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Porsche Engine Rebuild Parts for Complete and Partial Engine Rebuild
Restore reliability and performance with a comprehensive range of Porsche engine rebuild parts supplied for both partial repairs and full engine rebuilds. Design911 stocks everything from critical IMS components and rotating assembly parts to sealing solutions and fuel delivery hardware.
Whether you are addressing known weak points such as the intermediate shaft IMS system, refreshing worn internals with engine gaskets and complete gasket kits, or rebuilding ancillaries using fuel system parts, our catalogue supports accurate, model-specific engine work across classic and modern Porsche platforms.
Crankcase Breather System (Air/Oil Separator)
The crankcase breather system, also known as the air/oil separator (AOS), is a critical engine component that should be replaced every 30,000 miles—or sooner if signs of failure appear.
When the system fails, it can cause:
- Vacuum leaks due to cracked hoses or a damaged air/oil separator
- Oil consumption and fouled spark plugs, as oil is drawn into the intake
- Increased crankcase pressure, which can lead to gasket leaks and other engine issues
Preventative Maintenance
Preventative maintenance is always the best approach. Our comprehensive Crankcase Breather Hose Kit includes all the components you need to replace the system properly. We also recommend performing an engine oil change at the same time to ensure peak performance and longevity.
The AOS is basically a small diaphragm distillery which distills the minute amounts of oil mist in the crankcase, liquifies it and sends it back to the crankcase. The "clean" air is now sent into the air intake (after the throttle body) to be burned off by the engine.
When the AOS starts to fail it cannot separate all of the oil out of the mist and some liquid oil is sent to the air intake.
A few drops of oil is enough to generate the GREAT SMOKE BOMB for which our cars are famous for.
A big smoke bomb once in a while is completely normal, due to the architecture of the flat-6 engine, which may let a drop of oil flow into one of the combustion chambers sporadically.
Fits:
Porsche 996 C2 3.4L 1997-08/01
Porsche 996 C4 3.4L 1997-08/01
Parts included are:
- 1 x AOS Oil / air separator. Porsche 996 3.4L (ref 99610702355)
- 1 x Oil separator breather hose. Porsche 996 3.4L >>2001 (ref 99610714555)
- 1 x Crankcase breather hose. Porsche Boxster 986 >>2002 / 996 (ref 99610714755)
- 1 x Oil / Air Separator Boot Clamp. Porsche 986 Boxster / 996 >>2001 (ref 99951263000)
- 1 x Oil / Air Separator Boot for Porsche 996 3.4L 1998-02 / Boxster 986 - (ref 99610723752)
Click pictures for large parts diagram.
Diagram Ref No 1, 4 , 5
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
OILSEPARATOR.996.1.OEM
The product you are viewing cross references to these numbers
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
Crankcase Breather System (Air/Oil Separator)
The crankcase breather system, also known as the air/oil separator (AOS), is a critical engine component that should be replaced every 30,000 miles—or sooner if signs of failure appear.
When the system fails, it can cause:
- Vacuum leaks due to cracked hoses or a damaged air/oil separator
- Oil consumption and fouled spark plugs, as oil is drawn into the intake
- Increased crankcase pressure, which can lead to gasket leaks and other engine issues
Preventative Maintenance
Preventative maintenance is always the best approach. Our comprehensive Crankcase Breather Hose Kit includes all the components you need to replace the system properly. We also recommend performing an engine oil change at the same time to ensure peak performance and longevity.
The AOS is basically a small diaphragm distillery which distills the minute amounts of oil mist in the crankcase, liquifies it and sends it back to the crankcase. The "clean" air is now sent into the air intake (after the throttle body) to be burned off by the engine.
When the AOS starts to fail it cannot separate all of the oil out of the mist and some liquid oil is sent to the air intake.
A few drops of oil is enough to generate the GREAT SMOKE BOMB for which our cars are famous for.
A big smoke bomb once in a while is completely normal, due to the architecture of the flat-6 engine, which may let a drop of oil flow into one of the combustion chambers sporadically.
Fits:
Porsche 996 C2 3.6L
Porsche 996 C4 3.6L
Porsche 996 C4S 3.6L
Parts included are:
- 1 x AOS Oil / air separator. Porsche 996 3.4L (ref 99610702355)
- 1 x Oil separator breather hose. Porsche 996 3.4L >>2001 (ref 99610714555)
- 1 x Crankcase breather hose. Porsche Boxster 986 >>2002 / 996 (ref 99610714755)
- 1 x Oil / Air Separator Boot Clamp. Porsche 986 Boxster / 996 >>2001 (ref 99951263000)
- 1 x Oil / Air Separator Boot for Porsche 996 3.4L 1998-02 / Boxster 986 - (ref 99610723752)
Click pictures for large parts diagram.
Diagram Ref No 1, 4 , 5
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
OILSEPARATOR.996.2.OEM
The product you are viewing cross references to these numbers
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
Kit includes:
1 x Plastigauge PL-A box
1 x Plastiguage Mineral grease
1 x Plastiguage Silicone grease
PLASTIGAUGE PL-A is widely used in the measurement of clearance in plain automotive bearings. Measurement of clearance in big-end bearings can be achieved without dismantling the crankshaft.
3G Minerak Grease: To coat journal prior to use of Plastigauge
3G Silicone Grease: To apply to surface of shell
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
PLASKIT
The product you are viewing cross references to these numbers
2 x Bearing shell for intermediate shaft (with shoulder).
Set of 4pcs
Set of 4 includes four bearing shells for the intermediate shaft. This bearing set is used to control axial play and radial support of the intermediate shaft. These precisely machined shells maintain the correct end-float, allowing accurate cam timing and smooth chain drive function under high RPM loads.
Fits:
Porsche 911 - 1965 to 1989
Porsche 964 - 1989 to 1994
Porsche 993 - 1994 to 1998
Porsche 996 turbo / GT2 / GT3
Porsche 997.1 turbo / GT2 / GT3
Porsche 997.2 GT2 / GT3
Diagram ref no 29 & 30.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610143571
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) GT2 1994-97
- Porsche 993 (911) TURBO S 1994-97
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT3 / GT3 RS 2007-09
- Porsche 997 MK1 GT2 2007-09
12 x Big end bearing shells in standard size
12 x Connection Rod Bolts
6 x Connection Rod Bearing
Engineered to replace the original connecting rod bearings used on Porsche Boxster 986 / 987 and 911 996 / 997 and 987 Cayman platforms
Fits:
Porsche 986 Boxster 1997 - 2004
Porsche 987.1 Boxster 2005 - 2008
Porsche 987C.1 Cayman 2006 - 2008
Porsche 996 1997 - 2005
Porsche 997 2005 - 2008
Diagram ref no 10, 11 & 12.
Each bearing shell is produced with smooth, low-friction bearing surfaces and consistent wall thickness to maintain correct rod-to-crankshaft clearances when installed in the rod big end. The standard size designation indicates these bearings retain factory bore dimensions, ideal for engines where no crankshaft undersize machining has been performed.
Big end bearing shells provide the low-friction interface between the connecting rod and crankshaft journal. They help to support dynamic engine loads and maintain a stable lubricating oil film that protects both the rod and crankshaft from metal-to‐metal contact. With proper oil flow and clearance, these bearings help ensure reliable rotation and reduce wear under normal and high-load conditions.
Installed in pairs inside each connecting rod’s big end bore, these bearing shells support the rotating crankshaft by maintaining correct clearance and offering a durable, smooth surface for the journal to ride on. Their design promotes even oil distribution and stable hydrodynamic lubrication - essential for wear resistance, smooth engine operation, and long service life.
Big end bearings are central to engine bottom-end integrity. They endure high loads, RPMs, and constant motion. Over time or due to lubrication issues, bearings can wear, lose material, or show surface degradation - leading to increased clearances, knocking noises, reduced oil pressure, and accelerated wear of the crankshaft journal.
Replacing worn bearings with OE Match shells during a rebuild restores proper oil clearances and hydrodynamic lubrication, helping protect the crankshaft and rod journals from premature wear while supporting smooth, reliable engine operation.
When to replace:
• Engine is undergoing rebuild or overhaul
• Bearing wear, noise, or rod knock detected
• After lubrication or oil starvation incident
• During high-mile preventive maintenance
• When crankshaft journals are within standard size (no undersize needed)
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610312162
The product you are viewing cross references to these numbers
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- Porsche Boxster 987 2.7L 2005-08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
Fits:
Porsche 987 MKI Boxster 2005-08
Porsche 987C MKI Cayman 2006-08
Porsche 996 Carrera 1998-05
Porsche 996 Turbo 2001-05
Porsche 997 MKI Carrera 2005-08
Porsche 955 Cayenne S / Turbo 4.5L 2003-06
Click 'Zoom in' for large parts diagram.
Diagram Ref No 5.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610504172
The product you are viewing cross references to these numbers
- Porsche Boxster 987 2.7L 2005-08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 TURBO 2000-05
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
- Porsche 955 Cayenne S 4.5L V8 2003-06
- Porsche 955 Cayenne Turbo 4.5L 2003-06
2x 99610517353/1 - OE Match Timing Chain Guides
2x 99610517552/1 - OE Match Timing Chain Tensioner Guides
Manufactured to closely replicate the original Porsche components, this set provides a complete replacement for the timing chain guide and tensioner guide wear surfaces on compatible Porsche engines.
Fits:
Porsche 986 Boxster 2.5L / 2.7L / 3.2L 1997 - 2002
Porsche 996 3.4L 1998 - 2001
Diagram Ref No 33 & 30
The timing chain guide & tensioner guide set includes four precision-engineered plastic guides designed to match the original Porsche timing system components in fit, shape, and performance. When installed, these guides support the timing chain and help maintain correct chain tension and alignment throughout engine operation.
The timing chain guides and tensioner guides provide support and controlled routing for the timing chain, keeping it properly positioned as it rotates over the cam and crank sprockets. They work with the hydraulic tensioner to maintain correct chain tension, helping preserve accurate valve timing and reduce chain slack or noise.
Function:
• Timing Chain Guides (OE ref no 99610517353): Provide a wear-resistant surface that the timing chain runs against, supporting proper alignment and reducing chain vibration.
• Tensioner Guides (OE ref no 99610517552): Work in conjunction with the timing chain tensioner to keep chain tension stable, absorbing dynamic loads and preventing slack or chain chatter.
Together, the guides help ensure smooth, quiet chain operation, accurate timing, and long-term engine reliability.
Timing chain guides and tensioner guides are wear items in Porsche engines. Over time, original guide surfaces can wear, crack, or generate plastic debris due to heat and friction. Worn guides can lead to chain slack, noise, inaccurate valve timing, or accelerated chain and sprocket wear. Replacing them with OE Match components restores proper chain support, reduces operational noise, and helps protect expensive internal timing components.
When to replace:
• During timing chain service or overhaul
• If timing chain rattle / noise is detected at start-up or idle
• When engine has high mileage
• If prior guides show wear, cracking, or plastic debris
• As part of preventive maintenance on performance or daily-use engines
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610517353KIT
The product you are viewing cross references to these numbers
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
This set includes four Genuine Porsche OEM timing system components used in the timing chain assembly of Porsche engines:
2 × 99610517353 – Genuine Porsche Timing Chain Guides
2 × 99610517552 – Genuine Porsche Timing Chain Tensioner Guides
These parts are factory-original Porsche components engineered to the exact specifications used on production vehicles, ensuring proper fit, material performance, and long-term reliability.
Fits:
Porsche 986 2.5L / 2.7L / 3.2L Boxster 1997 - 2001
Porsche 996 3.4L 1998 - 2001
Diagram ref no 33 & 30
These OEM components are critical wear surfaces that support the timing chain’s routing and tension control, helping maintain accurate valve timing and quiet operation throughout the engine’s service life. Sold as a complete set, this kit is ideal when performing timing belt/chain servicing, major engine overhauls, or preventive maintenance on engines susceptible to guide degradation due to age or mileage.
• Timing Chain Guides (99610517353) - Provide stable support surfaces for the timing chain, maintaining its path over the sprockets and preventing lateral movement or unwanted vibration.
• Timing Chain Tensioner Guides (99610517552) - Work with the hydraulic tensioner to maintain correct chain tension, absorbing dynamic loads and helping prevent slack, noise, or chain wear.
Together, these guides help deliver stable, accurate timing chain function - crucial for maintaining precise cam/crank synchronization and long-term engine durability.
Timing chain guides and tensioner guides are wear components that degrade naturally over time due to friction, heat, and engine operation cycles. Deteriorated guides can contribute to timing chain noise, vibration, and inaccurate timing tension - potentially leading to premature chain and sprocket wear or timing system damage. Installing Genuine Porsche OEM guides restores the exact engineered surfaces and helps ensure timing accuracy, quiet operation, and long-term reliability.
When to replace:
• During scheduled timing system service or timing chain inspection
• If the engine exhibits chain rattle or timing-related noise
• After significant mileage or high-temperature operation
• When rebuild or overhaul procedures remove the original guides
• As part of preventive maintenance in performance or daily drivers
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610517353KIT.OE
The product you are viewing cross references to these numbers
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
Fits:
Porsche 986 Boxster 1997-04
Porsche 987 Boxster MKI 2005-08
Porsche 987C Cayman MKI 2005-08
Porsche 996 Carrera 1998-05
Porsche 997 Carrera 2005-08
Porsche 958 Cayenne 3.6ltr V6 - 2010-2017
Porsche 970.2 Panamera S / 4S 3.0ltr V6 - 2014 to 2016
Porsche 95B Macan S / GTS / turbo V6 Petrol - 2014 to 2018
Click 'Zoom in' for large parts diagram.
Diagram Ref No 11.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99710311501KIT
The product you are viewing cross references to these numbers
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- Porsche Boxster 987 2.7L 2005-08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
- Porsche 958 Cayenne V6 3.6L Petrol (300Hp) 2010-17
- Porsche 970.2 Panamera S V6 Turbo 3.0L 2WD (420Hp) 2014-16
- Porsche 970.2 Panamera S V6 Turbo 3.0L 2WD Executive 2014-16
- Porsche 970.2 Panamera 4S V6 Turbo 3.0L 4WD (420Hp) 2014-16
- Porsche 970.2 Panamera 4S V6 Turbo 3.0L 4WD Executive 2014-16
- Porsche 95B.1 Macan S Petrol 3.0L V6 (340Bhp) 2014-18
- Porsche 95B.1 Macan GTS Petrol 3.0L V6 (360Bhp) 2014-18
- Porsche 95B.1 Macan Turbo 3.6L V6 (400Bhp) 2014-18
Fits:
Porsche 993 1994-98
Porsche 996 Turbo / GT2 1998-05
Porsche 997 Turbo / GT2 2005-08
Click 'Zoom in' for large parts diagram.
Diagram Ref No 10.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610317670KIT
The product you are viewing cross references to these numbers
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) GT2 1994-97
- Porsche 993 (911) TURBO S 1994-97
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT2 2007-09
Fits:
Porsche 986 Boxster 1997-04
Porsche 987 Boxster MKI 2005-08
Porsche 987C Cayman MKI 2005-08
Porsche 996 Carrera 1998-05
Porsche 997 Carrera 2005-08
Porsche 958 Cayenne 3.6ltr V6 - 2010-2017
Porsche 970.2 Panamera S / 4S 3.0ltr V6 - 2014 to 2016
Porsche 95B Macan S / GTS / turbo V6 Petrol - 2014 to 2018
Click 'Zoom in' for large parts diagram.
Diagram Ref No 11.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99710311501
The product you are viewing cross references to these numbers
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- Porsche Boxster 987 2.7L 2005-08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
- Porsche 958 Cayenne V6 3.6L Petrol (300Hp) 2010-17
- Porsche 970.2 Panamera S V6 Turbo 3.0L 2WD (420Hp) 2014-16
- Porsche 970.2 Panamera S V6 Turbo 3.0L 2WD Executive 2014-16
- Porsche 970.2 Panamera 4S V6 Turbo 3.0L 4WD (420Hp) 2014-16
- Porsche 970.2 Panamera 4S V6 Turbo 3.0L 4WD Executive 2014-16
- Porsche 95B.1 Macan S Petrol 3.0L V6 (340Bhp) 2014-18
- Porsche 95B.1 Macan GTS Petrol 3.0L V6 (360Bhp) 2014-18
- Porsche 95B.1 Macan Turbo 3.6L V6 (400Bhp) 2014-18
12x Connecting Rod Bolt Piece 99610317670
12x Connecting Rod Nut Piece 99310317403
Fits:
Porsche 993 1994-98
Porsche 996 Turbo / GT2 1998-05
Porsche 997 Turbo / GT2 2005-08
Click 'Zoom in' for large parts diagram.
Diagram Ref No 10 & 11
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610317670KIT2
The product you are viewing cross references to these numbers
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) GT2 1994-97
- Porsche 993 (911) TURBO S 1994-97
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT2 2007-09
12x Connecting Rod Bolt Piece 99610317670
12x Connecting Rod Nut Piece 99310317403
Fits:
Porsche 993 1994-98
Porsche 996 Turbo / GT2 1998-05
Porsche 997 Turbo / GT2 2005-08
Click 'Zoom in' for large parts diagram.
Diagram Ref No 10 & 11
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610317670KIT3
The product you are viewing cross references to these numbers
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) GT2 1994-97
- Porsche 993 (911) TURBO S 1994-97
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT2 2007-09
Fits:
Porsche 911 1984-89
Porsche 911 (930) Turbo 1978-89
Porsche 964 1989-94
Porsche 993 1994-98
Porsche 996 Turbo / GT2 1998-05
Porsche 997 Turbo / GT2 2005-08
Diagram Ref No 11.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99310317403
The product you are viewing cross references to these numbers
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) GT2 1994-97
- Porsche 993 (911) TURBO S 1994-97
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT2 2007-09
Kit Includes
11 x Crank case Long screw studs
2 x Crank case Short screw studs
13 x Crank case screw Washers
13 x Crank case screw O-rings
11 x Crank case screw Nuts
Fits:
Porsche 964 1989-94
Porsche 993 1994-98
Porsche 996 Turbo
Click 'Zoom in' for large parts diagram.
Diagram Ref No 26, 27, 28, 29, 46.
Related reference numbers
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ENGINEKIT06
The product you are viewing cross references to these numbers
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) GT2 1994-97
- Porsche 993 (911) TURBO S 1994-97
- Porsche 996 TURBO 2000-05
Engine Cylinder Head Gasket Kit
The cylinder head gasket is a critical component that seals the cylinder head to the engine block. It serves several key functions, It seals the combustion chamber, ensuring proper compression for efficient engine performance. It prevents coolant and engine oil from mixing by sealing the fluid passages between the cylinder head and engine block.
Signs of Cylinder Head Gasket Failure
A failing head gasket can lead to serious engine problems. Common symptoms include:
- Engine overheating
- Low cylinder compression
- External coolant or oil leaks
- White smoke from the exhaust
- Bubbles in the radiator or coolant reservoir
- Milky or white-colored engine oil
Fits:
Porsche 996 C2 3.4L 1997-08/01
Porsche 996 C4 3.4L 1997-08/01
Click 'Zoom in' for large parts diagram
Diagram ref no 19 & 20.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610418059
The product you are viewing cross references to these numbers
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
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replacement engine: without drive plate tiptronic, without flywheel manual transmission, without compressor for 996 CARRERA 2/4/4S M96.01/02/03/04 1998-05 101-00
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crankshaft 996 Carrera 2/4/4S M96.01/02/03/04 1998-05 102-00
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cylinder head 996 CARRERA 2/4 M96.01/02/04 UPTO 2001 103-00
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cylinder head 996 CARRERA 2/4/4S M96.03 2002 ONWARDS 103-01
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camshaft driving mechanism 996 CARRERA 2/4/4S M96.01/02/04 UPTO 2001 103-10
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camshaft driving mechanism 996 CARRERA 2/4/4S M96.03 2002 ONWARDS 103-11
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crankcase bleeding 996 CARRERA 2/4/4S M96.01/02/03/04 1998-05 104-10
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crankcase left 996 TURBO 2001-05 101-05
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crankcase right 996 TURBO 2001-05 101-10
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crankshaft 996 TURBO 2001-05 102-00
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valve control 996 TURBO 2001-05 103-15
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turbocharging 996 TURBO/GT2 2001-05 107-20
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crankcase left 996 GT3-1 M96.76 2000-01 and 996 GT3-1/GT3 RS M96.79 2004-05 101-05
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crankcase right 996 GT3-1 M96.76 2000-01 and 996 GT3-1/GT3 RS M96.79 2004-05 101-10
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valve control 996 GT3-1 M96.76 2000-01 and 996 GT3-1/GT3 RS M96.79 2004-05 103-15
Porsche Engine Rebuild Parts
Whether you’re planning a complete Porsche engine overhaul or simply replacing a small gasket, Design911 has the right parts for the job. We stock everything from O-rings and gaskets to crankshafts and camshafts, sourced from the most reputable manufacturers including Victor Reinz, Elring, Goetze, Mahle, and Federal-Mogul.
Our catalogue covers both classic and modern Porsche engines, with components and tools designed to meet or exceed OEM specifications. From intricate timing chains and belts to major assemblies, we provide the parts you need to rebuild, refresh, or upgrade your Porsche’s engine.
Our Range of Engine Rebuild Parts
We also supply the tools and accessories needed for precision rebuilding, ensuring professional results whether you’re working on a home restoration or motorsport preparation.
Common Porsche Engine Issues
Porsche engines are robust, but some models face well-known
issues that require rebuild or replacement parts:
- Excessive
Engine Smoke – often caused by oil separator failure or oil overfill;
a common issue in 996 and 986 models
- IMS Bearing Failures – particularly affecting certain 996 models; early detection can save an engine, but advanced failure may require a complete rebuild
- Timing
Chain & Belt Problems – worn components can affect performance and
cause catastrophic failures if neglected
- Exhaust Leaks – damaged manifolds or gaskets allow fumes to escape, impacting performance and emissions
While some issues are minor and corrected with a single replacement part, others can escalate into major rebuilds if ignored.
Do I Need to Rebuild My Porsche Engine?
Not every problem requires a full rebuild. Regular oil changes, inspections, and routine servicing can prevent many issues. However, an engine rebuild may be required if:
- IMS bearing failure has caused internal damage
- Timing components have failed
- Major wear or overheating has damaged pistons, valves, or crankshafts
- You want to restore your engine to factory condition
- You’re seeking performance gains beyond OEM output
Rebuilds are common across a wide range of Porsches, from air-cooled icons like the 356, 911, and 914s, through to 996, 997 GT3s, and turbocharged models. Whether for restoration or performance, rebuilding can breathe new life into your Porsche.
Why Choose Design911 for Engine Rebuild Parts?
Worldwide
Shipping – expertly packed and delivered fast
Shop Porsche engine rebuild parts today – from IMS bearing kits and gaskets to full turbo upgrades – and give your Porsche engine the performance and reliability it deserves.
Buy Porsche Engine Rebuild Parts with Confidence: Trusted by 18,000+ Porsche Owners
Porsche owners trust Design911 for the quality of our engine rebuild parts and the expertise behind them. From IMS components and internal engine parts to complete rebuild solutions, our team supports accurate part selection and reliable results. Discover why over 18,000 Porsche owners rate Design911 as “Excellent” on Trustpilot.
Porsche Engine Bearings, Pistons and Internal Engine Components
Rebuilding the internal structure of a Porsche engine requires correctly matched components manufactured to precise tolerances. Design911 supplies a wide range of Porsche engine rebuild parts covering the complete rotating and valvetrain assemblies, suitable for both partial repairs and full engine rebuilds. This includes critical items such as engine shell bearings, piston rings, pistons and cylinders and connecting rods, all supplied as Genuine Porsche or OEM-approved components.
Bottom end rebuilds are supported with precision parts including crankshafts and crankcase components designed to maintain correct oil clearance, balance and long-term reliability. For top end engine work, Design911 offers a complete selection of cylinder heads and camshaft covers, camshaft covers and gaskets and performance camshafts, allowing accurate valve timing and dependable operation across all Porsche models.
Why Buy Porsche Engine Rebuild Parts from Design911
- Specialist Expertise: Over 25 years of experience supplying Porsche engine parts and rebuild components.
- Extensive Stock: More than half a million Porsche parts available, including IMS components, gaskets, bearings, pistons and internal engine parts.
- Dedicated Support: A knowledgeable team providing fast assistance by phone or email.
- Free UK Delivery: Free delivery on orders over £200, with worldwide shipping including Europe and beyond.
- Trusted by Porsche Owners: Over 110,000 Porsche enthusiasts trust Design911. View Trustpilot reviews.
Order your Porsche engine rebuild parts with confidence, or call us for advice and fitting options
Porsche IMS Bearings, Timing Chains and Tensioner Systems
Correct timing is critical to Porsche engine reliability, particularly on models affected by intermediate shaft design. Design911 supplies a full range of Porsche IMS bearings and components developed to address known wear points and support long-term engine durability during rebuilds and preventative maintenance.
Alongside IMS solutions, we stock complete timing system components including timing chains and tensioners designed to maintain accurate valve timing and consistent chain tension throughout the engine’s operating range. Supporting drive systems are covered with engine rebuild belts, tensioners and rollers ensuring correct belt tracking, reduced vibration and reliable auxiliary operation.
For comprehensive rebuilds, Design911 also supplies related sealing and protection parts such as timing covers and gaskets, helping to prevent oil contamination and premature wear. All timing and IMS components are offered as Genuine Porsche or OEM-approved parts to ensure correct fitment, longevity and factory-correct engine behaviour.
Engine Rebuild Parts for All Porsche Models
Whatever your Porsche model, Design911 supplies engine rebuild parts tailored to your vehicle:
- Porsche 911 (classic models, 996, 997, 991)
- Porsche Boxster and Cayman
- Porsche Cayenne
- Porsche Macan
- Porsche Panamera
- Porsche Taycan
- Porsche 924, 928, 944, 968 and more
Whether you are carrying out a partial engine repair, replacing worn components or planning a complete engine rebuild, find the correct parts easily by model and engine specification.
Engine Fitment, Tolerances and Component Compatibility
Correct fitment and component compatibility are essential when rebuilding a Porsche engine. Design911 supplies Genuine Porsche and OEM-approved engine rebuild parts designed to match original factory specifications, ensuring every component integrates correctly within the engine assembly.
Matched to Original Porsche Specifications
Each engine component, whether a set of piston rings, a connecting rod, a camshaft or a radial oil seal, is produced to original dimensions and material standards. This ensures correct seating, proper oil flow and reliable interaction between moving parts across all Porsche engine generations.
Designed for Accurate Mechanical Integration
Engine rebuild parts supplied by Design911 are selected to maintain the correct relationships between critical systems:
IMS components align with factory timing geometryGaskets and complete gasket kits maintain correct sealing pressure and oil system integrityTiming chains and tensioners support stable and accurate valve timingPistons, cylinders and piston rings maintain consistent compression and wear characteristicsEngine mounts, vacuum pumps, fuel system and oil system components integrate cleanly with OEM interfaces
Compatibility Across Porsche Engine Platforms
Whether working on an air-cooled flat six or a modern water-cooled turbocharged engine, Design911 supports compatibility across the full Porsche range by supplying parts manufactured to:
Original material specificationsFactory torque and installation requirementsOEM machining tolerancesModel-specific sequencing and alignment standards
Reducing Fitment Errors and Premature Wear
Using incorrectly matched engine components can lead to issues such as timing misalignment, oil pressure loss, bearing failure, compression imbalance or premature wear of internal parts. Design911 helps reduce these risks by offering engine rebuild components that meet Porsche’s original design intent and fitment requirements.
Porsche Engine Wear, Service Intervals and Maintenance Guide
Porsche engine components wear at different rates depending on mileage, driving conditions, maintenance history and engine generation. The table below outlines typical service or inspection intervals along with common symptoms of wear for key Porsche engine rebuild components.
| Component | Typical Service or Inspection Interval | Common Signs of Wear |
|---|---|---|
| Piston Rings | 80,000 to 120,000 miles | Increased oil consumption, blue exhaust smoke |
| Engine Bearings | 80,000 to 150,000 miles | Knocking noises, low oil pressure |
| Engine Mounts | 60,000 to 90,000 miles | Excessive vibration, engine movement |
| Fuel Pumps | 70,000 to 110,000 miles | Hard starting, hesitation, noisy operation |
| Fuel Injectors | 60,000 to 100,000 miles | Misfires, rough idle, poor fuel economy |
| Vacuum Pumps | 60,000 to 80,000 miles | Oil leaks, reduced brake assist |
| Timing Chains and Tensioners | Inspect every 80,000 miles | Rattle on cold start, timing faults |
| IMS Component | 40,000 to 70,000 miles (affected models) | Metallic debris in oil, abnormal noise |
| Gaskets and Seals | 5 to 10+ years | Oil leaks, smoke on start-up |
| Turbo and Intercooler Components | 80,000 to 140,000 miles | Boost loss, whistling noises, smoke |
IMS Bearing Replacement and Porsche Engine Reliability
Maintaining Porsche engine reliability starts with addressing known wear points, particularly on models equipped with an intermediate shaft. Design911 supplies a full range of IMS bearings and intermediate shaft components designed to support preventative maintenance and long-term engine durability on affected Porsche engines.
Why Replace the IMS Bearing
- Improved Engine Longevity: Replacing worn IMS components helps reduce the risk of engine failure on Porsche 986, 996 and early 997 models.
- Improved Reliability Under Load: Correct replacement parts help maintain stability under normal driving conditions and during higher engine loads.
- Correct Fitment and Compatibility: Design911 IMS components are supplied as Genuine Porsche or OEM-approved parts, ensuring correct alignment, lubrication and compatibility with factory engine geometry.
- Peace of Mind for Owners: Replacing the IMS bearing during an engine rebuild or clutch replacement helps protect the engine and preserve long-term vehicle value.
Design911 offers IMS-related components suitable for inspection, replacement or preventative servicing, allowing owners and workshops to address this critical area with confidence.
Complete Engine Rebuild Kits and Specialist Tools
For customers planning a full engine rebuild or major engine work, Design911 offers complete engine rebuild kits and specialist engine tools to simplify the process and ensure consistency across all components. Engine rebuild kits typically combine essential parts such as gaskets, seals, bearings and fasteners, helping reduce the risk of mismatched components and repeated downtime.
Alongside rebuild kits, Design911 supplies a wide range of Porsche engine specialist tools designed specifically for Porsche engines. These tools support accurate disassembly, measurement and installation of internal components, including timing systems, crankshafts and cylinder heads. Using the correct tools helps protect precision parts and ensures work is carried out to Porsche-recommended standards.
Whether you are an experienced workshop or a knowledgeable enthusiast, sourcing engine rebuild kits and specialist tools from a single supplier helps streamline the rebuild process and improve overall reliability.
See How Our Performance Parts Transform a Porsche 997 GT3
Take a closer look at how Steve upgraded his Porsche 997 GT3 using trusted performance parts from Design911. This video highlights how smarter brakes, sharper suspension, improved cooling and carefully selected engine related components come together to create a focused driver’s car.
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Porsche Engine Rebuild Parts FAQs
IMS related concerns mainly affect:
- Porsche Boxster 986
- Porsche 911 Carrera 996
- Porsche 911 997.1 (early models)
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Saturday: Closed
Sunday: Closed