Chains & Tensioners

Engine timing Chain Kit for camshaft and oil pump gears
This OE Match engine timing chain kit provides the listed components for the camshaft timing and oil pump drive systems used across selected Porsche 987.2, 981, 997.2 and 991.1 engines. It is intended for timing-system overhaul work where associated chains, guide components and sprockets are being renewed together.

Fits:
Porsche 987.2 Boxster
Porsche 981 Boxster
Porsche 987C.2 Cayman
Porsche 981C Cayman
Porsche 997.2
Porsche 991.1

Contains:
 2x 9A110514203
 1x 9A110523302
 1x 9A110523502
 2x 9A110515304
 2x 9A110515504
 2x 9A110515703
 1x 9A110522502
 1x 9A110514702
 1x 9A110514802
 2x 9A110510102

Diagram ref no 1

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

9A110514203

The product you are viewing cross references to these numbers

Engine timing Chain Kit for camshaft and oil pump.



2x Chain links 142 Closed chain,
1x Chain links 60 Closed chain,
2x Tensioner, timing chain

Fits:
Porsche 987.2 Boxster
Porsche 981 Boxster
Porsche 987C.2 Cayman
Porsche 981C Cayman
Porsche 997.2
Porsche 991.1

Click 'Zoom in' for large parts diagram.
Diagram ref no 1

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

9A110514203

The product you are viewing cross references to these numbers

Engine timing chain kit for oil pump gear.



Fits:
Porsche 987.2 Boxster / Boxster S - 2009 to 2012
Porsche 987C.2 Cayman / Cayman S
Porsche 981 Boxster - 2012 to 2016
Porsche 981C Cayman - 2013 to 2016
Porsche 718 Boxster / Boxster S - 2017 Onwards
Porsche 718 Cayman / Cayman S - 2017 Onwards
Porsche 997.2 - 2009 to 2012
Porsche 991.1 - 2012 to 2016

Contains
1 x Drive chain 9A110523302
1 x Tensioner blade 9A110523502
1 x Socket head bolt 9A110506201
1 x O-ring 99970734640

Click 'Zoom in' for large parts diagram.
Diagram ref no 2, 3, 10 and 11

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

9A110523302

The product you are viewing cross references to these numbers

Engine Timing Chain Tensioner Blade.

Fits:
Porsche 982 Boxster Spyder RS (718) 4.0L 2019>>
Porsche 982 Cayman GT4 RS (718) 4.0L 2019>>
Porsche 991 GT3 RS / R / Speedster 4.0L MKI / MKII 2014>>2020
Porsche 992.1 GT3 / RS / ST 4.0L MKI 2021>>

Diagram Ref No 3

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

0PB109508A

The product you are viewing cross references to these numbers

Timing Chain For Camshaft / Crankshaft.
The PORSCHE Timing Chain For Camshaft / Crankshaft 0PB109252C is a genuine Porsche internal engine timing component designed to maintain the precise mechanical relationship between the crankshaft and camshaft timing system.
Sold Each.
x2 Required Per Engine.

Fits:

• Porsche 991.1 R 4.0L (500 Bhp) 2016
• Porsche 991.1 GT3 RS 4.0L (500 Bhp) 2015-16
• Porsche 991.2 Speedster 4.0L (510Bhp) 2019
• Porsche 991.2 GT3 4.0L (500 Bhp) / GT3 RS 4.0L (520 Bhp) 2017-19  

Diagram Ref No 1

The timing chain transfers rotational drive from the crankshaft through the timing mechanism so that camshaft operation remains correctly synchronised with piston movement. This precise relationship allows the intake and exhaust valves to operate at the correct points during the engine's combustion cycle.

Timing chains are designed for extended service life, but continuous mechanical loading, friction, heat and lubrication conditions can gradually cause wear. Chain elongation, worn guides, defective tensioners or damaged sprockets can create excessive slack and affect timing accuracy.

If deterioration becomes severe enough for the chain to jump, derail or fail, incorrect valve timing and potentially serious internal engine damage can result.

What This Product Does:
The camshaft/crankshaft timing chain provides the mechanical connection required to keep crankshaft rotation and camshaft operation correctly synchronised.

As the crankshaft rotates, the timing drive transfers this movement to the camshaft timing system.

This helps maintain:

• Correct crankshaft-to-camshaft synchronisation
• Accurate valve timing
• Correct intake valve operation
• Correct exhaust valve operation
• Reliable mechanical timing
• Smooth combustion
• Stable engine operation
• Consistent power delivery

Correct timing-chain tension and accurate engagement with the associated sprockets are essential for maintaining this relationship.

Symptoms Of Wear Or Failure:
Possible symptoms of timing-chain or associated timing-system deterioration include:

• Metallic rattling or clattering from the timing area
• Timing-chain rattle during cold starts
• Noise immediately after engine start-up
• Excessive chain slack
• Timing-chain elongation
• Mechanical noise that changes with engine RPM
• Rough or irregular engine operation
• Unstable idle
• Difficult or extended starting
• Reduced engine performance
• Poor throttle response
• Misfires
• Engine warning light
• Timing-related diagnostic fault codes
• Camshaft-position faults
• Crankshaft-position faults
• Crankshaft/camshaft correlation faults
• Variable camshaft timing faults where applicable
• Visible chain wear during inspection
• Worn or broken timing-chain guides
• Excessive tensioner travel
• Abnormal sprocket wear
• Metal or plastic debris in the engine oil or filter

These symptoms can also be caused by guides, tensioners, sprockets, variable timing components, sensors or lubrication problems. Proper diagnosis is therefore important before individual components are replaced.

Why Replacement Matters:
The Timing Chain is a critical component within the engine timing system.

Replacing a confirmed worn, elongated or damaged chain can help:

• Restore accurate crankshaft/camshaft synchronisation
• Maintain correct valve timing
• Restore dependable mechanical timing
• Reduce excessive chain slack
• Reduce abnormal timing-chain noise
• Maintain reliable sprocket engagement
• Protect timing-chain guides
• Protect associated sprockets
• Reduce the risk of timing deviation
• Reduce the risk of the chain jumping
• Reduce the risk of chain derailment
• Support smooth engine operation
• Protect expensive internal engine components

Continuing to operate an engine with a confirmed timing-chain problem can allow wear to progress and substantially increase the cost of the eventual repair.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

0PB109252C

The product you are viewing cross references to these numbers

Timing Chain For Camshaft / Crankshaft.
The IWIS Timing Chain For Camshaft / Crankshaft is a replacement internal engine timing component for compatible Porsche applications. It forms part of the mechanical timing drive responsible for maintaining the precise relationship between crankshaft rotation and camshaft operation.  
Sold Each.
x2 Required Per Engine.

Fits:

• Porsche 991.1 R 4.0L (500 Bhp) 2016
• Porsche 991.1 GT3 RS 4.0L (500 Bhp) 2015-16
• Porsche 991.2 Speedster 4.0L (510Bhp) 2019
• Porsche 991.2 GT3 4.0L (500 Bhp) / GT3 RS 4.0L (520 Bhp) 2017-19  

Diagram Ref No 1

The timing chain transfers rotational drive from the crankshaft through the timing mechanism so that camshaft operation remains correctly synchronised with piston movement. This precise relationship allows the intake and exhaust valves to operate at the correct points during the engine's combustion cycle.

Timing chains are designed for extended service life, but continuous mechanical loading, friction, heat and lubrication conditions can gradually cause wear. Chain elongation, worn guides, defective tensioners or damaged sprockets can create excessive slack and affect timing accuracy.

If deterioration becomes severe enough for the chain to jump, derail or fail, incorrect valve timing and potentially serious internal engine damage can result.

What This Product Does:
The camshaft/crankshaft timing chain provides the mechanical connection required to keep crankshaft rotation and camshaft operation correctly synchronised.

As the crankshaft rotates, the timing drive transfers this movement to the camshaft timing system.

This helps maintain:

• Correct crankshaft-to-camshaft synchronisation
• Accurate valve timing
• Correct intake valve operation
• Correct exhaust valve operation
• Reliable mechanical timing
• Smooth combustion
• Stable engine operation
• Consistent power delivery

Correct timing-chain tension and accurate engagement with the associated sprockets are essential for maintaining this relationship.

Symptoms Of Wear Or Failure:
Possible symptoms of timing-chain or associated timing-system deterioration include:

• Metallic rattling or clattering from the timing area
• Timing-chain rattle during cold starts
• Noise immediately after engine start-up
• Excessive chain slack
• Timing-chain elongation
• Mechanical noise that changes with engine RPM
• Rough or irregular engine operation
• Unstable idle
• Difficult or extended starting
• Reduced engine performance
• Poor throttle response
• Misfires
• Engine warning light
• Timing-related diagnostic fault codes
• Camshaft-position faults
• Crankshaft-position faults
• Crankshaft/camshaft correlation faults
• Variable camshaft timing faults where applicable
• Visible chain wear during inspection
• Worn or broken timing-chain guides
• Excessive tensioner travel
• Abnormal sprocket wear
• Metal or plastic debris in the engine oil or filter

These symptoms can also be caused by guides, tensioners, sprockets, variable timing components, sensors or lubrication problems. Proper diagnosis is therefore important before individual components are replaced.

Why Replacement Matters:
The Timing Chain is a critical component within the engine timing system.

Replacing a confirmed worn, elongated or damaged chain can help:

• Restore accurate crankshaft/camshaft synchronisation
• Maintain correct valve timing
• Restore dependable mechanical timing
• Reduce excessive chain slack
• Reduce abnormal timing-chain noise
• Maintain reliable sprocket engagement
• Protect timing-chain guides
• Protect associated sprockets
• Reduce the risk of timing deviation
• Reduce the risk of the chain jumping
• Reduce the risk of chain derailment
• Support smooth engine operation
• Protect expensive internal engine components

Continuing to operate an engine with a confirmed timing-chain problem can allow wear to progress and substantially increase the cost of the eventual repair.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

0PB109252C

The product you are viewing cross references to these numbers

Timing chain guide rail. Sold each.



Fits:
Porsche 987.2 Boxster
Porsche 981 Boxster Spyder 2012 to 2016
Porsche 987.2 Cayman
Porsche 981 Cayman GT4 - 2016
Porsche 718 Cayman GT4 RS - 2022 Onwards
Porsche 997.2 Carrera / Carrera 4 - 2009 to 2012
Porsche 997.2 Carrera S / Carrera 4S - 2009 to 2012
Porsche 991 turbo - 2012 to 2018
Porsche 991 GT3 - 2012 to 2018
Porsche 992 GT3 - 2019 Onwards

Replaces OE numbers - 9A110515502, 9A110515503 and 9A110515504

Click 'Zoom in' for large parts diagram.
Diagram ref no 6

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

0PB109509A

The product you are viewing cross references to these numbers

Timing chain guide rail.



Fits:
Porsche 987.2 Boxster / Boxster S - 2009 to 2012
Porsche 981 Boxster S 3.4ltr - 2012 to 2016
Porsche 997.2 Cayman / Cayman S - 2009 to 2012
Porsche 981 Cayman S 3.4ltr - 2012 to 2016
Porsche 981 Cayman GT4 - 2016
Porsche 997.2 - Carrera / Carrera 4 - 2009 to 2012
Porsche 997.2 Carrera S / Carrera 4S - 2009 to 2019
Porsche 991.1 Carrera S  3.8ltr - 2012 to 2016
Porsche 991.1 Carrera 4S 3.8ltr - 2012 to 2016
Porsche 991 turbo - 2012 to 2016
Porsche 991 GT3 - 2012 to 2018

Replaces OE numbers 9A110515302 and 9A110515303

Click 'Zoom in' for large parts diagram.
Diagram ref no 4

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

9A110515304

The product you are viewing cross references to these numbers

Timing Chain Slide Rail.
Keep your engine running with factory precision. The Timing Chain Guide Rail is an OEM Porsche component designed to maintain correct alignment and tension of the timing chain. By guiding chain movement smoothly and accurately, this rail helps ensure perfect synchronization between the crankshaft and camshafts — a critical factor for optimal engine performance, efficiency, and longevity.

Fits:

• Porsche Boxster 981 S / GTS 3.4L 2012-16
• Porsche Boxster 981 Spyder 3.8L 2016
• Porsche Boxster Spyder 718 4.0L (420 Bhp)
• Porsche Boxster 25 Years 718 4.0L Manual (400 Bhp)
• Porsche Boxster 25 Years 718 4.0L PDK (400 Bhp)
• Porsche 991.1 Carrera C2S 3.8L (400Bhp) 2012-16
• Porsche 991.1 Carrera C4S 3.8L (400Bhp) 2012-16
• Porsche 991.1 R 4.0L (500 Bhp) 2016
• Porsche 991.1 GT3 3.8L (475Bhp) 2014-16
• Porsche 991.1 GT3 RS 4.0L (500Bhp) 2015-16
• Porsche 991.2 Turbo Coupe 3.8L (540 Bhp) 2016-19
• Porsche 991.2 Turbo S Coupe 3.8L (580 Bhp) 2016-19
• Porsche 991.2 Turbo Cabriolet 3.8L (540 Bhp) 2016-19
• Porsche 991.2 Turbo S Cabriolet 3.8L (580 Bhp) 2016-19
• Porsche 991.2 Speedster 4.0L (510Bhp) 2019
• Porsche 991.2 GT3 4.0L (500 Bhp) / GT3 RS 4.0L (520 Bhp) 2017-19
• Porsche 991.2 GT2 RS 3.8L PDK (700 bhp) 2018-19
• Porsche 992.1 GT3 4.0L / 992 S/T 4.0L 2021-24
• Porsche 992.1 GT3 RS 4.0L 2022-24
• Porsche Cayman S / GTS 3.4L 981 2013-16
• Porsche Cayman GT4 3.8L 2015-16
• Porsche Cayman GT4 718 4.0L / GT4 RS 718 4.0L  

Diagram Ref No 5

What This Product Does:

• The guide/slide rail helps maintain correct path and tension for the timing chain, preventing the chain from flopping, jumping, or hitting other components.

Symptoms Of Failure:

• Rattling or clattering noise from the timing chain cover area (especially at cold start or idle) because the chain may be loose and hitting the guide/rail or adjacent parts.
  
• Poor engine performance: misfires, rough idle, hesitation on acceleration. This is because incorrect timing = valves and pistons not synchronised.
  
• Check Engine Light: with timing or cam/crank correlation codes. If the chain jumps or the guide fails significantly, the timing can get out of spec, triggering the ECU. 
  
• Metal shavings in oil or oil pan (in more advanced wear). If the chain or guide breaks up, fragments can circulate.
  
• Engine won’t start or sudden failure in worst-case: if timing chain jumps many teeth or breaks, the engine may stop or suffer internal damage.
  
  

Why Replacement Matters:

• Because the timing chain and its guides are critical for engine timing: if the guide rail fails and allows the chain to slip, the engine’s valve timing will go off. This can lead to serious internal engine damage (valves hitting pistons, heavy wear) in many high-performance engines.
  
• Replacing the guide rail (and possibly the chain, tensioners, etc) before catastrophic failure helps avoid a full engine rebuild or replacement, which is far more expensive.
  
• Even though the part itself may not be extremely expensive (the guide rail), the labour cost of access is high (because to reach it you may need to remove covers, maybe ancillary components) — doing it early is more cost-effective.
• Ensures the engine continues to operate as designed, maintaining performance, reliability and longevity.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

0PB109513A

The product you are viewing cross references to these numbers

Timing chain tensioner for the camshaft-to-crankshaft chain.

Sold individually; x2 per engine. 

Fits:
Porsche 987-2 Boxster 2009-12
Porsche 987-2 Cayman 2009-12

Porsche 981 Boxster 2012-16
Porsche 981 Boxster Spyder 2016
Porsche 981 Cayman 2014-16
Porsche 981 Cayman GT4 2016

Porsche 718 (982) Boxster GTS 4.0L 2017>>
Porsche 718 (982) Boxster Spyder / RS 2019>>
Porsche 718 (982) Cayman GTS 4.0L 2017>>
Porsche 718 (982) Cayman GT4 / RS 2019>>

Porsche 997-2 Carrera 2009-12
Porsche 997-2 Turbo 2010-13 - Excludes GT2

Porsche 991-1 Carrera 2012-16
Porsche 991 Turbo / GT2 RS 2014-20
Porsche 991 GT3 / RS 2014-21

Porsche 992-1 Turbo 2020>>
Porsche 992 GT3 / RS 2021>>

Diagram ref. 4. 

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

0PB109507E

The product you are viewing cross references to these numbers

Timing Chain, Oil Pump / Crankshaft.
The PORSCHE Timing Chain, Oil Pump / Crankshaft 0PB109229B is a genuine Porsche internal engine drive component designed to provide the mechanical connection between the crankshaft drive and oil pump system on compatible Porsche applications.

Fits:

• Porsche Boxster Spyder RS 718 4.0L 01/2019>>
• Porsche 991.1 R 4.0L (500 Bhp) 2016
• Porsche 991.1 GT3 RS 4.0L (500 Bhp) 2015-16
• Porsche 991.2 Speedster 4.0L (510Bhp) 2019
• Porsche 991.2 GT3 4.0L (500 Bhp) / GT3 RS 4.0L (520 Bhp) 2017-19
• Porsche 992.1 GT3 4.0L / 992 S/T 4.0L 2021-24
• Porsche 992.1 GT3 RS 4.0L 2022-24
• Porsche 992.2 GT3 2025>>
• Porsche Cayman GT4 RS 718 4.0L 

 
Diagram Ref No 2

The chain transfers rotational drive from the engine to the oil pump, allowing the pump to circulate engine oil through critical lubrication points. Reliable operation is essential because the engine depends on continuous oil circulation to lubricate bearings, crankshaft journals, camshaft components, timing components and other moving internal parts.

Although designed for extended service life, an oil pump drive chain operates continuously whenever the engine is running. Wear to the chain, sprockets, guides or tensioning components can eventually cause excessive slack, abnormal noise or unreliable oil pump drive.

What This Product Does:
The oil pump/crankshaft chain transfers mechanical rotation from the crankshaft drive system to the engine oil pump.

As the engine runs, the chain keeps the oil pump mechanically driven so that it can circulate engine oil throughout the lubrication system.

This supports lubrication of critical components including:

• Crankshaft bearings
• Connecting-rod bearings
• Camshaft components
• Valvetrain components
• Timing-system components
• Other internal moving and friction surfaces

The chain itself does not create oil pressure. Its function is to drive the oil pump; the pump and lubrication system are responsible for generating and maintaining the required oil flow and pressure.

Symptoms Of Wear Or Failure:
Possible symptoms of chain or associated drive-system deterioration include:

• Metallic rattling or clattering from the engine
• Mechanical chain noiseNoise that changes with engine RPM
  
• Excessive chain slack
• Chain elongation
• Visible wear to chain links or pins
• Abnormal sprocket wear
• Worn or damaged guides, where fitted
• Excessive tensioner movement, where applicable
• Metal or plastic debris in the engine oil
• Debris found in the oil filter
• Oil-pressure warning light
• Low oil-pressure warning message
• Oil-pressure-related diagnostic faults
• Abnormal engine noise caused by inadequate lubrication

A low oil-pressure warning does not automatically mean the drive chain has failed. Low oil level, a worn oil pump, blocked oil passages, pickup problems, incorrect oil, pressure-control faults, bearing wear or an oil-pressure sensor problem can produce similar symptoms.

Why Replacement Matters:
The Oil Pump / Crankshaft Timing Chain performs a critical mechanical function within the engine lubrication system.

Replacing a confirmed worn, elongated or damaged chain can help:

• Restore reliable oil pump drive
• Maintain dependable oil circulation
• Reduce excessive chain slack
• Reduce abnormal mechanical noise
• Restore reliable sprocket engagement
• Protect associated sprockets and guides
• Reduce the risk of chain derailment
• Reduce the risk of chain breakage
• Support correct engine lubrication
• Protect bearings and other internal engine components
• Reduce the risk of lubrication-related engine damage

Because the oil pump is essential to engine survival, a confirmed fault in its mechanical drive system should not be ignored.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

0PB109229B

The product you are viewing cross references to these numbers

Timing Chain, Oil Pump / Crankshaft.
The IWIS Timing Chain, Oil Pump / Crankshaft is a replacement internal engine drive chain for compatible Porsche applications. It forms part of the engine lubrication system and provides the mechanical drive connection between the crankshaft drive and oil pump.

Fits:

• Porsche Boxster Spyder RS 718 4.0L 01/2019>>
• Porsche 991.1 R 4.0L (500 Bhp) 2016
• Porsche 991.1 GT3 RS 4.0L (500 Bhp) 2015-16
• Porsche 991.2 Speedster 4.0L (510Bhp) 2019
• Porsche 991.2 GT3 4.0L (500 Bhp) / GT3 RS 4.0L (520 Bhp) 2017-19
• Porsche 992.1 GT3 4.0L / 992 S/T 4.0L 2021-24
• Porsche 992.1 GT3 RS 4.0L 2022-24
• Porsche 992.2 GT3 2025>>
• Porsche Cayman GT4 RS 718 4.0L 

 
Diagram Ref No 2

The chain transfers rotational drive from the engine to the oil pump, allowing the pump to circulate engine oil through critical lubrication points. Reliable operation is essential because the engine depends on continuous oil circulation to lubricate bearings, crankshaft journals, camshaft components, timing components and other moving internal parts.

Although designed for extended service life, an oil pump drive chain operates continuously whenever the engine is running. Wear to the chain, sprockets, guides or tensioning components can eventually cause excessive slack, abnormal noise or unreliable oil pump drive.

What This Product Does:
The oil pump/crankshaft chain transfers mechanical rotation from the crankshaft drive system to the engine oil pump.

As the engine runs, the chain keeps the oil pump mechanically driven so that it can circulate engine oil throughout the lubrication system.

This supports lubrication of critical components including:

• Crankshaft bearings
• Connecting-rod bearings
• Camshaft components
• Valvetrain components
• Timing-system components
• Other internal moving and friction surfaces

The chain itself does not create oil pressure. Its function is to drive the oil pump; the pump and lubrication system are responsible for generating and maintaining the required oil flow and pressure.

Symptoms Of Wear Or Failure:
Possible symptoms of chain or associated drive-system deterioration include:

• Metallic rattling or clattering from the engine
• Mechanical chain noise
• Noise that changes with engine RPM
• Excessive chain slack
• Chain elongation
• Visible wear to chain links or pins
• Abnormal sprocket wear
• Worn or damaged guides, where fitted
• Excessive tensioner movement, where applicable
• Metal or plastic debris in the engine oil
• Debris found in the oil filter
• Oil-pressure warning light
• Low oil-pressure warning message
• Oil-pressure-related diagnostic faults
• Abnormal engine noise caused by inadequate lubrication

A low oil-pressure warning does not automatically mean the drive chain has failed. Low oil level, a worn oil pump, blocked oil passages, pickup problems, incorrect oil, pressure-control faults, bearing wear or an oil-pressure sensor problem can produce similar symptoms.

Why Replacement Matters:
The Oil Pump / Crankshaft Timing Chain performs a critical mechanical function within the engine lubrication system.

Replacing a confirmed worn, elongated or damaged chain can help:

• Restore reliable oil pump drive
• Maintain dependable oil circulation
• Reduce excessive chain slack
• Reduce abnormal mechanical noise
• Restore reliable sprocket engagement
• Protect associated sprockets and guides
• Reduce the risk of chain derailment
• Reduce the risk of chain breakage
• Support correct engine lubrication
• Protect bearings and other internal engine components
• Reduce the risk of lubrication-related engine damage

Because the oil pump is essential to engine survival, a confirmed fault in its mechanical drive system should not be ignored.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

0PB109229B

The product you are viewing cross references to these numbers

Timing Chain, Oil Pump / Crankshaft.
The PORSCHE Timing Chain, Oil Pump / Crankshaft 9A110523391 is a genuine Porsche internal engine drive component designed to transfer mechanical rotation between the crankshaft drive system and the engine oil pump on compatible Porsche applications.

Fits:

• Porsche 991.1 R 4.0L (500 Bhp) 2016
• Porsche 991.1 GT3 RS 4.0L (500 Bhp) 2015-16 

 
Diagram Ref No 2

The oil pump must operate continuously while the engine is running to circulate lubricant to critical internal components. This chain provides the mechanical drive required for that operation, helping maintain dependable engine lubrication and protection of bearings, timing components and other moving surfaces.

Although designed for long service life, continuous mechanical loading, heat, friction and lubrication conditions can gradually cause wear to the chain and associated components. Excessive chain elongation or damage can create slack, abnormal noise and, in severe cases, compromise the mechanical drive to the oil pump.

What This Product Does:
The chain transfers rotational movement from the crankshaft drive system to the engine oil pump.

As the engine rotates, this mechanical drive allows the oil pump to circulate engine oil through the lubrication system.

Reliable oil circulation supports lubrication of critical components such as:

• Crankshaft bearings
• Connecting-rod bearings
• Camshaft and valvetrain components
• Timing chains and sprockets
• Timing-chain guides and tensioners
• Other internal moving components and friction surfaces

The chain itself does not generate oil pressure. Its purpose is to mechanically drive the oil pump. The pump, pressure-control system and lubrication circuit are responsible for producing and regulating oil flow and pressure.

Symptoms Of Wear Or Failure:
Possible symptoms of deterioration within the chain or associated drive system include:

• Metallic rattling or clattering
• Mechanical chain noise from the engine
• Noise that changes with engine RPM
• Rattle during engine start-up
• Excessive chain slack
• Chain elongation
• Excessive chain movement
• Visible wear to chain links or pins
• Abnormal sprocket wear
• Worn or damaged chain guides, where fitted
• Excessive tensioner travel, where applicable
• Metal or plastic debris in the engine oil
• Wear debris found in the oil filter
• Oil-pressure warning light
• Low oil-pressure warning message
• Oil-pressure-related diagnostic faults
• Abnormal engine noise associated with inadequate lubrication

An oil-pressure warning does not automatically mean the chain has failed. Low oil level, oil pump wear, a blocked pickup, pressure-regulation faults, excessive bearing clearance, incorrect oil or a defective pressure sensor can produce similar symptoms.

Why Replacement Matters:
The Timing Chain performs a critical mechanical role within the engine lubrication system.

Replacing a confirmed worn, elongated or damaged chain can help:

• Restore reliable oil pump drive
• Maintain dependable engine oil circulation
• Reduce excessive chain slack
• Reduce abnormal mechanical noise
• Restore reliable sprocket engagement
• Protect associated sprockets
• Protect chain guides and tensioning components
• Reduce the risk of chain derailment
• Reduce the risk of chain breakage
• Support correct engine lubrication
• Protect bearings and other internal components
• Reduce the risk of lubrication-related engine damage

Because reliable lubrication is fundamental to engine operation, confirmed wear or damage within the oil pump drive system should not be ignored.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

9A110523391

The product you are viewing cross references to these numbers

Timing Chain, Oil Pump / Crankshaft.
The IWIS Timing Chain, Oil Pump / Crankshaft is a replacement internal engine drive chain for compatible Porsche applications. It forms part of the engine lubrication system and provides the mechanical drive connection between the crankshaft drive and engine oil pump.

Fits:

• Porsche 991.1 R 4.0L (500 Bhp) 2016
• Porsche 991.1 GT3 RS 4.0L (500 Bhp) 2015-16 

 
Diagram Ref No 2

The oil pump must operate continuously while the engine is running to circulate lubricant to critical internal components. This chain provides the mechanical drive required for that operation, helping maintain dependable engine lubrication and protection of bearings, timing components and other moving surfaces.

Although designed for long service life, continuous mechanical loading, heat, friction and lubrication conditions can gradually cause wear to the chain and associated components. Excessive chain elongation or damage can create slack, abnormal noise and, in severe cases, compromise the mechanical drive to the oil pump.

What This Product Does:
The chain transfers rotational movement from the crankshaft drive system to the engine oil pump.

As the engine rotates, this mechanical drive allows the oil pump to circulate engine oil through the lubrication system.

Reliable oil circulation supports lubrication of critical components such as:

• Crankshaft bearings
• Connecting-rod bearings
• Camshaft and valvetrain components
• Timing chains and sprockets
• Timing-chain guides and tensioners
• Other internal moving components and friction surfaces

The chain itself does not generate oil pressure. Its purpose is to mechanically drive the oil pump. The pump, pressure-control system and lubrication circuit are responsible for producing and regulating oil flow and pressure.

Symptoms Of Wear Or Failure:
Possible symptoms of deterioration within the chain or associated drive system include:

• Metallic rattling or clattering
• Mechanical chain noise from the engine
• Noise that changes with engine RPM
• Rattle during engine start-up
• Excessive chain slack
• Chain elongation
• Excessive chain movement
• Visible wear to chain links or pins
• Abnormal sprocket wear
• Worn or damaged chain guides, where fitted
• Excessive tensioner travel, where applicable
• Metal or plastic debris in the engine oil
• Wear debris found in the oil filter
• Oil-pressure warning light
• Low oil-pressure warning message
• Oil-pressure-related diagnostic faults
• Abnormal engine noise associated with inadequate lubrication

An oil-pressure warning does not automatically mean the chain has failed. Low oil level, oil pump wear, a blocked pickup, pressure-regulation faults, excessive bearing clearance, incorrect oil or a defective pressure sensor can produce similar symptoms.

Why Replacement Matters:
The Timing Chain performs a critical mechanical role within the engine lubrication system.

Replacing a confirmed worn, elongated or damaged chain can help:

• Restore reliable oil pump drive
• Maintain dependable engine oil circulation
• Reduce excessive chain slack
• Reduce abnormal mechanical noise
• Restore reliable sprocket engagement
• Protect associated sprockets
• Protect chain guides and tensioning components
• Reduce the risk of chain derailment
• Reduce the risk of chain breakage
• Support correct engine lubrication
• Protect bearings and other internal components
• Reduce the risk of lubrication-related engine damage

Because reliable lubrication is fundamental to engine operation, confirmed wear or damage within the oil pump drive system should not be ignored.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

9A110523391

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Timing chain
OE Match timing chain for Porsche Boxster, Cayman, 997, and 991 models. This replacement timing chain helps maintain accurate camshaft timing and reliable engine operation.
Sold individually

Fits:
Porsche 987.2 Boxster 2009 - 2012
Porsche 981 Boxster 2012 - 2016
Porsche 987C.2 Cayman 2009 - 2012
Porsche 981C Cayman 2013 - 2016
Porsche 997.2 2009 - 2012
Porsche 991.1 2012 - 2016

Diagram ref no 1

The timing chain synchronises engine rotation between the crankshaft and camshafts. Correct timing chain operation is essential for accurate valve timing, smooth running, engine performance, and long-term reliability.

Functions
• Replaces the engine timing chain
• Helps synchronise crankshaft and camshaft movement
• Supports accurate valve timing
• Helps maintain smooth engine running and performance
• Used during timing chain, camshaft drive, or engine rebuild service
• Replaces stretched, noisy, worn, or damaged timing chains
• OE Match replacement for Porsche engine timing system repair.

Why Replace This Part?
Timing chains are highly loaded engine components and can wear, stretch, become noisy, or suffer damage over time. A worn or stretched timing chain may cause timing noise, poor running, fault codes, reduced performance, or incorrect camshaft timing. Replacing the timing chain helps restore correct engine timing and protects related timing system components.

When to Replace This Part
•  Timing chain noise or rattle is present
•  Timing chain stretch is detected
•  Camshaft timing faults or related engine codes are present
•  Engine performance is reduced or running is uneven
•  Timing chain guides, tensioners, or camshaft drive parts are being replaced
•  Engine rebuild or major timing service is being carried out
•  Preventative replacement is required during Porsche engine maintenance

Where it fits on the car
This timing chain fits within the engine timing / camshaft drive system on Porsche Boxster, Cayman, 997, and 991 models. Exact chain position can vary depending on engine type and timing layout.

Related reference numbers
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9A110514203

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Timing Chain.
Restore your Porsche’s timing drive system with this genuine OEM chain. Designed for Porsche 987.2 / 981 / 982 Boxster / Cayman / 997.2 / 991.1 / 991.2 2009>> fitments, this timing chain drives the crank to oil pump/cam chain path. If your engine is showing timing cover noise, fault codes or high mileage, a new timing chain is key to maintaining performance and reliability.

Fits:

• Porsche Boxster 987 MKII 2.9L 2009-2012
• Porsche Boxster S 987 MKII 3.4L 2009-2012
• Porsche Boxster 981 2.7L 2012-16
• Porsche Boxster 981 S / GTS 3.4L 2012-16
• Porsche Boxster 981 Spyder 3.8L 2016
• Porsche Boxster 718 2.0L Manual (300 Bhp)
• Porsche Boxster 718 2.0L PDK (300 Bhp)
• Porsche Boxster S 718 2.5L Manual (350 Bhp)
• Porsche Boxster S 718 2.5L PDK (350 Bhp)
• Porsche Boxster T 718 2.0L Manual (300 Bhp)
• Porsche Boxster T 718 2.0L PDK (300 Bhp)
• Porsche Boxster GTS 718 2.5L Manual (365 Bhp)
• Porsche Boxster GTS 718 2.5L PDK (365 Bhp)
• Porsche 997 MKII Carrera C2 3.6L 2009-12
• Porsche 997 MKII Carrera C4 3.6L 2009-12
• Porsche 997 MKII Carrera C2S 3.8L 2009-12
• Porsche 997 MKII Carrera C4S 3.8L 2009-12
• Porsche 997 MKII Turbo 2010-13
• Porsche 997 MKII GT2 RS 2011-13
• Porsche 991.1 Carrera C2 3.4L (350Bhp) 2012-16
• Porsche 991.1 Carrera C2S 3.8L (400Bhp) 2012-16
• Porsche 991.1 Carrera C4 3.4L (350Bhp) 2012-16
• Porsche 991.1 Carrera C4S 3.8L (400Bhp) 2012-16
• Porsche 991.1 Turbo 3.8L (520bhp) 2014-16
• Porsche 991.1 Turbo S 3.8L (560Bhp) 2014-16
• Porsche 991.1 R 4.0L (500 Bhp) 2016
• Porsche 991.1 GT3 3.8L (475Bhp) 2014-16
• Porsche 991.1 GT3 RS 4.0L (500Bhp) 2015-16
• Porsche 991.2 Carrera 2 3.0L (370 Bhp) 2016-19
• Porsche 991.2 Carrera 2S 3.0L (420 Bhp) 2016-19
• Porsche 991.2 Carrera 4 3.0L (370 Bhp) 2016-19
• Porsche 991.2 Carrera 4S 3.0L (420 Bhp) 2016-19
• Porsche 991.2 Cabriolet 2 3.0L (370 Bhp) 2016-19
• Porsche 991.2 Cabriolet 2S 3.0L (420 Bhp) 2016-19
• Porsche 991.2 Cabriolet 4 3.0L (370 Bhp) 2016-19
• Porsche 991.2 Cabriolet 4S 3.0L (420 Bhp) 2016-19
• Porsche 991.2 Targa 4 3.0L (370 Bhp) 2016-19
• Porsche 991.2 Targa 4S 3.0L (420 Bhp) 2016-19
• Porsche 991.2 Turbo Coupe 3.8L (540 Bhp) 2016-19
• Porsche 991.2 Turbo S Coupe 3.8L (580 Bhp) 2016-19
• Porsche 991.2 Turbo Cabriolet 3.8L (540 Bhp) 2016-19
• Porsche 991.2 Turbo S Cabriolet 3.8L (580 Bhp) 2016-19
• Porsche 991.2 Speedster 4.0L (510Bhp) 2019
• Porsche 991.2 GT3 4.0L (500 Bhp) / GT3 RS 4.0L (520 Bhp) 2017-19
• Porsche 991.2 GT2 RS 3.8L PDK (700 bhp) 2018-19
• Porsche Cayman 2.9L 987C MKII 2009-12
• Porsche Cayman S / R 3.4L 987C MKII 2009-12
• Porsche Cayman 2.7L 981 2013-16
• Porsche Cayman S / GTS 3.4L 981 2013-16
• Porsche Cayman GT4 3.8L 2015-16
• Porsche Cayman 718 2.0L Manual (300Bhp)
• Porsche Cayman 718 2.0L PDK (300Bhp)
• Porsche Cayman S 718 2.5L Manual (350Bhp)
• Porsche Cayman S 718 2.5L PDK (350Bhp)
• Porsche Cayman T 718 2.0L Manual (300Bhp)
• Porsche Cayman T 718 2.0L PDK (300 Bhp)
• Porsche Cayman GTS 718 2.5L Manual (365 Bhp)
• Porsche Cayman GTS 718 2.5L PDK (365 Bhp)  

Diagram Ref No 10

What This Product Does:

• The timing chain synchronises the crankshaft with other components — here especially linking to the oil pump / cam drive path — so that the engine’s valves operate at the correct times relative to piston movement.
• Over time, chains can stretch, guides may wear, tensioners may degrade — all of which will allow slack in the drive, noise, timing drift or even failure.
• Essentially, this chain is a critical link in the engine’s timing system — it must stay within spec to ensure the engine runs as designed.

When You Should Consider Replacement:

• Rattling or clattering noise from the engine’s timing‐cover area, especially on cold start, idle or at low revs. Slack chain often causes this.
  
• Timing-related fault codes — cam/ crank correlation errors, or variable valve timing issues that could stem from chain/tensioning irregularity.
  
• Loss of engine performance, rough running, mis-fires, or inconsistent response — because timing drift can affect the engine’s breathing and ignition.
  
• High mileage or long service interval without chain replacement — wear accumulates even if symptoms are subtle.
  
• Visual inspection (where possible) may show wear or elongation in chain links, damaged guides or tensioner issues.

Why Replacement Matters:

• Engine protection: A failed or excessively worn timing chain can cause piston-valve contact, or major internal engine damage. Replacing the chain significantly reduces that risk.
  
• Maintains timing accuracy: A new chain ensures correct timing events — vital for power delivery, engine smoothness, efficiency and longevity.
  
• Noise & NVH improvement: Slack or worn chain components often produce unwanted noise and degrade refinement — renewed parts improve comfort.
  
• Cost-efficiency: Since accessing the chain involves significant labour (front engine cover, oil pump, possibly other removal), replacing the chain while you’re already in saves repeated work.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

9A110523302

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