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Porsche 996 (911) (1997-2005) 996 C2 3.4L 1997-08/01 Engine Rebuild Parts

Chains & Tensioners

Chains & Tensioners

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DISPLAYING 33 to 41 (of 41 products)
1 2 3
Timing chain guide. Porsche 986 Boxster 1997-02 / 996 3.4L 1998-01 - 99610517353 - 25606
3
Timing chain guide. Porsche 986 Boxster 1997-02 / 996 3.4L 1998-01
99610517353/1
Product Information
Product Information
Timing chain guide.
OE Match timing chain guide designed to replicate the original Porsche factory component used in the timing chain system of certain Porsche flat-six engines. It provides a smooth, wear-resistant surface against which the timing chain runs, helping maintain correct chain alignment and reduce noise.
Sold each, 2 required per engine. 

Fits:
Porsche 986 Boxster 2.5L / 2.7L / 3.2L 1997 - 2002
Porsche 996 3.4L 1998 - 2001

Diagram Ref No 33.

The timing chain guide provides a guided surface for the timing chain, helping it run smoothly over the cam and crank sprockets. It helps minimize vibration, reduce “chain slap,” and maintain correct chain tracking as the chain cycles through its range of motion.

Function: Installed within the timing cover/case, the guide sits along the chain’s routing path and offers a stable, sliding surface that interacts with the chain links. In conjunction with the timing chain tensioner (such as part 99610517552), it helps maintain correct chain tension, reduces wear on both the chain and sprockets, and supports quiet, efficient engine operation.

Timing chain guides are wear items subject to constant chain contact and engine vibration. Over time, original guides can wear unevenly, crack, or shed material - which can lead to chain noise, reduced tension stability, and accelerated wear on the chain and sprockets. Replacing worn guides with an OE Match component helps preserve timing accuracy and reduces the risk of serious timing system damage.

When to replace:
• Engine exhibits chain rattle or timing noise
• Original guides are cracked, worn, or contaminated
• Timing system is being serviced or rebuilt
• During high-mile preventive maintenance
• After tensioner service or replacement

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Related, superseded, cross reference or alternative numbers for comparison.

99610517353
99610517353

The product you are viewing cross references to these numbers
Timing chain strap / support. Porsche 996 / 997 - SR222, SR222-GT3
2
Timing chain strap / support. Porsche 996 / 997
SR222-GT3
Product Information
Product Information

The Stomski Racing timing chain strap / support holds the chain during Porsche 911 crankcase assembly. Two versions are offered: SR222 for all 911 engines and SR222-GT3 for 996/997 GT2, GT3 and TT engines. Sold individually

Fits:

  • 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 996 GT2 2001-05
  • Porsche 996 GT3 MKI 1999-02
  • Porsche 996 GT3 MKII 2003>>
  • Porsche 996 GT3 RS 2003-04
  • 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 997 MK1 TURBO 2007-09
  • Porsche 997 MK1 GT3 / GT3 RS 2007-09
  • Porsche 997 MK1 GT2 2007-09
  • 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 GT3 / GT3 RS 2010-11
  • Porsche 997 MKII Turbo 2010-13
  • Porsche 997 MKII GT2 RS 2011-13

SR222 for the 911 / 964 / 993 engines.

Check fitment for your specific vehicle (model, year, engine) before ordering.

What This Product Does

This workshop tool supports the timing chain while the crankcase sections are brought together. Its length, curved profile and tension are designed to assist that assembly operation; it is not a replacement timing chain or an operating chain tensioner.

Functions

Supports the chain during engine assembly.
Helps the crankcase sections come together with the chain supported.

Technical Details

Manufacturer: Stomski Racing.
Construction: steel.
Versions: SR222 and SR222-GT3, with different sizes for their stated engine applications.
Quantity: sold individually.

Timing chain tensioner blade. Porsche 997.1 / 987 Boxster / 987C Cayman - 99610515801, 99610515800, 99610515600 - 104876, 104877
5
Timing chain tensioner blade. Porsche 997.1 / 987 Boxster / 987C Cayman
99610515
Product Information
Product Information

Timing chain tensioner blade
This OE Match timing chain tensioner blade is a replacement guide rail used within the engine timing chain system. It provides a controlled contact surface for the timing chain and works together with the chain tensioner to maintain correct chain position and tension.

Fits
Porsche 997.1 Carrera 3.8L 2005 - 2008
Porsche 987.1 Boxster 2.7L / 3.2L / 3.4L 2005 - 2008
Porsche 987C.1 Cayman 2.7L / 3.4L 2006 - 2008

Diagram ref no 30

What This Product Does

Located within the camshaft drive assembly, the blade provides a contact surface for the chain. It cooperates with the tensioning mechanism to control chain movement and support consistent tracking on applicable M96 / M97 flat-six engines.


Functions

  • Supports the chain along its intended route.
  • Transfers tensioner action through the blade.
  • Helps limit unwanted chain movement and vibration.
  • Contributes to stable camshaft drive operation.


Technical Details

  • 99610515600: Left bank, cylinders 1–3.
  • 99610515801: Right bank, cylinders 4–6.


Symptoms of Fault

  • Rattling or slapping sounds around the chain drive.
  • Visible scoring, fractures or missing sections on the blade.
  • Guide fragments discovered during oil-system inspection.
  • Timing deviation faults requiring further investigation.

These findings do not establish blade failure on their own; inspect the complete timing assembly before selecting replacement components.


Why Replacement Matters

Repeated chain contact, temperature changes and oil exposure can deteriorate the guiding surface. Renewing a damaged blade addresses wear at that contact point. OE Match provides a Porsche-focused replacement option, with application and specification checks forming part of its component assessment.

Consider blade renewal during chain-drive repairs, camshaft timing work or an engine rebuild when inspection identifies deterioration. Assess the chains, tensioners and neighbouring guides together rather than assuming one replacement will resolve every source of noise.


FAQs

Which reference should I select?
Match the original reference and cylinder bank: 99610515600 serves cylinders 1–3, while 99610515801 serves cylinders 4–6.

Does start-up noise prove the blade needs replacing?
No. Increasing or persistent rattling warrants diagnosis of the chain drive, including its tensioners and guides.

Should related guides be inspected?
Yes. Check adjoining timing components for wear whenever the assembly is accessible.



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

99610515
99610515801
99610515800
99610515600

The product you are viewing cross references to these numbers
Timing chain. Porsche 996 / 986 - 99610517053, 99610517054, 99610517052, 25396
8
Timing chain. Porsche 996 / 986
Special Order item
99610517054
Product Information
Product Information
Timing chain. 2 per engine. Price is for each.

Fits:
Porsche 996 3.4L C2 / C4 1998-01
Porsche 986 Boxster 1997-04

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

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

99610517054
99610517053
99610517054
99610517052
25396

The product you are viewing cross references to these numbers
Timing Chain. Porsche 996 / 986 - 99610517053, 99610517054, 99610517052, 25396, 50027067
2
Timing Chain. Porsche 996 / 986
99610517054/1
Product Information
Product Information
Timing Chain. 2 per engine

Fits:
Porsche 996 3.4L C2 / C4 1998-01
Porsche 986 Boxster 1997-04

Click 'Zoom in' for large parts diagram.
Diagram Ref No 6.

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

99610517054
99610517053
99610517054
99610517052
25396
50027067

The product you are viewing cross references to these numbers
Timing chain. Porsche 996 / 986 - 99610517155, 25394, 99610517157
2
Timing chain. Porsche 996 / 986
Special Order item
99610517157
Product Information
Product Information
Timing chain. 1 per engine.

Fits:
Porsche 996 3.4L 1998-00
Porsche 986 Boxster 1997-01

Click 'Zoom in' for large parts diagram.
Diagram Ref No 17.

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

99610517157
99610517155
25394
99610517157

The product you are viewing cross references to these numbers
Timing chain. Porsche 996 / 986 - 99610517154, 99610517155, 99610517157 - 50034371, 25394
3
Timing chain. Porsche 996 / 986
99610517157/2
Product Information
Product Information
Timing chain. 
This OE Match timing chain is a replacement camshaft timing chain for Porsche 996 and 986 Boxster models. It is designed to match the original-style fit and function, helping maintain correct engine timing and reliable valve train operation.
1 per engine

Fits:
Porsche 996 3.4L 1998 - 2000
Porsche 986 Boxster 1997 - 2001

Diagram Ref No 17

The timing chain links the crankshaft drive to the camshaft drive system, keeping the camshafts synchronised with the crankshaft. Correct timing allows the engine valves to open and close at the right moment, supporting smooth running, correct combustion, and dependable engine performance.

Functions
•  Drives the camshaft timing system
•  Helps keep crankshaft and camshaft timing synchronised
•  Supports correct valve opening and closing timing
•  Helps maintain smooth engine running and performance
•  Replaces stretched, noisy, worn, or damaged timing chains
•  Supports reliable valve train operation
•  OE Match replacement for engine timing repair or rebuild work.

Why Replace This Part?
Timing chains are exposed to constant load, heat, oil, and high-speed engine operation. Over time, a chain can stretch, wear, become noisy, or affect accurate camshaft timing. A worn timing chain may cause rattling noises, poor running, timing deviation faults, reduced performance, or potential engine damage if left unresolved. Replacing the timing chain helps restore accurate timing and long-term engine reliability.

When to Replace This Part
•   The timing chain is stretched, worn, noisy, or damaged
•   There is rattling from the timing chain area
•   Camshaft timing deviation faults are present
•   The engine has poor running, misfires, or reduced performance linked to timing issues
•   Chain guides, tensioners, sprockets, or related timing components are being replaced
•   The engine is being rebuilt or overhauled
•   Preventative replacement is being carried out during major engine service.

Where it fits on the car
This timing chain fits inside the engine timing chain system on Porsche 996 and 986 Boxster models. It forms part of the camshaft drive arrangement and should be installed according to the factory timing layout and engine specification.

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

99610517157
99610517154
99610517155
99610517157

The product you are viewing cross references to these numbers
Timing chain. Porsche 996 / 986 Boxster - 99610517752, 99610517753
2
Timing chain. Porsche 996 / 986 Boxster
Special Order item
99610517753
Product Information
Product Information
Timing Chain. 2 per engine. Sold each

Fits:
Porsche 996 3.4L C2/C4 1998-01
Porsche 986 Boxster 1997-04

Click 'Zoom in' for large parts diagram.
Diagram ref No 26.

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

99610517753
99610517752
99610517753

The product you are viewing cross references to these numbers
Timing chain. Porsche 996 / 986 Boxster - 99610517753, 99610517752 - 50035791, 25393, 25199
2
Timing chain. Porsche 996 / 986 Boxster
99610517753/2
Product Information
Product Information
Engine timing chain. CLOSED TYPE.
OE Match replacement engine timing chain - also referred to as the camshaft/intermediate shaft timing chain - designed to replicate the original Porsche timing chain used in the engine timing drive system of early 911 (996) and Boxster engines.
2 per engine. Sold each.

Fits:
Porsche 996 3.4L C2/C4 1998 - 2001
Porsche 986 Boxster 1997 - 2004

Diagram Ref No 26.

The timing chain ensures precise mechanical synchronization between critical rotating components of the engine - primarily the crankshaft and camshafts (and in some layouts, the intermediate shaft). It maintains the correct timing of valve opening and closing events relative to piston position, which is vital for efficient combustion, smooth engine operation, and proper power delivery.

Function:
•  Synchronises rotation of the crankshaft and camshafts
•  Maintains correct valve timing for intake and exhaust events
•  Transfers mechanical drive through intermediate gears/shafts
•  Supports reliable engine performance and emissions control.

A worn or elongated timing chain can cause timing errors, engine noise, rough running, or in more severe cases, engine damage if the timing relationship is lost.

The timing chain is a critical engine component. Over long service intervals and high mileage, the chain can stretch or wear, leading to slack, improper timing, and noisy operation. If not addressed, timing chain issues can cause:
•  Engine noise (chain rattle)
•  Poor idle and power delivery
•  Timing inaccuracies affecting combustion
•  Potential engine damage if timing is lost.

Replacing worn chains with an OE Match unit helps ensure accurate timing, preserves engine performance, and protects other internal engine components.

When to replace. Replace the timing chain when:
•  There is rattling or slapping noise from the timing cover area
•  Timing chain slack is detected in inspection
•  You are performing an engine rebuild or overhaul
•  Timing tensioner or guides show wear
•  Irregular idle or misfires suggest timing drift


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

99610517753
99610517753
99610517752

The product you are viewing cross references to these numbers
DISPLAYING 33 to 41 (of 41 products)
1 2 3
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About Chains & Tensioners

Precision Timing Chains & Tensioners – Engine Synchronisation and Reliability for Porsche Models

The timing chain system is one of the most critical components of a Porsche engine, ensuring perfect synchronisation between the crankshaft and camshafts. This precise coordination allows valves to open and close at the right moment, maintaining smooth power delivery, fuel efficiency, and long-term engine health.

At Design911, we supply a comprehensive range of precision-engineered timing chains, guides, and hydraulic tensioners designed to meet or exceed manufacturer performance standards. Each component is manufactured from high-strength materials for exceptional wear resistance and durability — vital for high-revving, performance-oriented Porsche engines.

What Do Timing Chains and Tensioners Do?

A timing chain connects the crankshaft to the camshafts, ensuring accurate valve timing. The tensioner keeps the chain taut to prevent slack, vibration, or noise, maintaining precise timing under all load conditions.

Core Functions:

  • Synchronise engine timing between the camshaft and crankshaft.
  • Maintain valve timing accuracy for optimal combustion and power.
  • Prevent chain slack and noise through hydraulic or spring-loaded tensioning.
  • Ensure long-term reliability in both performance and everyday driving.

Together, these components preserve the exacting standards of Porsche engine operation — vital for both power and longevity.

Why Do Timing Chains and Tensioners Fail?

Over time, wear, oil degradation, and heat cycles can cause timing components to deteriorate. When neglected, they may stretch, seize, or lose tension — leading to severe engine damage.

Common Causes of Failure Include:

  • Chain stretch or elongation, resulting in timing misalignment.
  • Worn or leaking hydraulic tensioners, causing chain rattle on start-up.
  • Contaminated or degraded engine oil, accelerating wear.
  • Broken chain guides from heat stress or material fatigue.
  • Insufficient oil pressure, reducing hydraulic tensioner performance.

A failing timing chain system can lead to poor performance, rough idling, check-engine lights, or — in extreme cases — catastrophic valve-to-piston contact.

Why Replace with Performance-Grade Timing Components?

Replacing aging timing components with manufacturer-quality parts ensures reliable valve timing, smoother operation, and peace of mind.

Key Benefits:

  • Restores precise valve timing for peak performance and efficiency.
  • Prevents engine noise and vibration caused by chain slack.
  • Protects against catastrophic engine damage due to chain failure.
  • Constructed from heat-treated, high-grade steel for long service life.
  • Engineered to match original timing profiles for Porsche engines.
  • Perfect fitment for classic air-cooled and modern water-cooled models.

Whether performing preventive maintenance or a complete rebuild, these timing chains and tensioners deliver race-ready reliability with road-tested durability.

Highlights:

  • Precision-engineered timing chains, guides, and tensioners for Porsche engines.
  • Restores timing accuracy and eliminates start-up rattle or misfire issues.
  • Built from heat-treated alloy steel for maximum longevity.
  • Hydraulic and mechanical tensioners available for various Porsche models.
  • Ideal for performance rebuilds and preventative maintenance.
  • Compatible with air-cooled and water-cooled Porsche engines.

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