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Timing chain guide. Porsche 986 Boxster 1997-02 / 996 3.4L 1998-01 ❭ 99610517353
- 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
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Related, superseded, cross reference or alternative numbers for comparison.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
The product you are viewing cross references to these numbers
- 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
- Porsche 997 MKII GT3 / GT3 RS 2010-11
- Porsche 997 MKII Turbo 2010-13
- Porsche 997 MKII GT2 RS 2011-13
This guide rail ensures the timing chain follows the correct path, maintaining chain alignment and tension over the life of the engine. The guide is engineered to resist wear from chain contact, vibration, thermal expansion and age. It installs into the existing timing cover without modification. It is used on the left/right-hand / lower side (depending on engine layout) and works in conjunction with the chain tensioners and other guide rails to keep valve timing accurate and engine operation smooth.
Fits:
Porsche 996 Turbo 2001 - 2005
Porsche 996 GT3 2000 - 2005
Porsche 997 Turbo 2007 - 2011
Porsche 997 GT3 2007 - 2011
Diagram ref no 21
Ideal for engine rebuilds, timing-chain replacements, or preventive maintenance on high-mileage engines.
This chain guide rail:
• Guides the timing chain to follow the correct path between crankshaft, camshafts, and intermediate shafts - ensuring synchronised valve timing.
• Maintains chain tension and alignment under load and throughout thermal cycles, preventing chain slippage or jumping that could damage the engine.
• Reduces noise, rattles, and wear that occur when the chain rubs against incorrect or worn surfaces.
• Serves as a critical component for overall engine longevity and reliability, especially in high-mileage or performance-oriented engines.
Timing-chain guide rails wear over time due to constant metal-to-plastic/rubber contact, heat, and vibration. A worn guide rail can lead to:
• Chain misalignment, slippage or jumping - risking engine timing errors, valve-to-piston contact, or catastrophic engine damage
• Excessive timing noise, rattling, or vibration
• Premature wear on chain, sprockets, and tensioners - leading to costly repairs.
Replacing with a correctly spec’d guide rail restores proper chain pathing, prolongs timing-system life, and helps avoid severe engine damage.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610516
The product you are viewing cross references to these numbers
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT3 / GT3 RS 2007-09
- Porsche 997 MK1 GT2 2007-09
- Porsche 997 MKII GT3 / GT3 RS 2010-11
- Porsche 997 MKII Turbo 2010-13
- Porsche 997 MKII GT2 RS 2011-13
Fits:
Porsche 997.1 Turbo / GT2 2007-09
Porsche 997.2 Turbo / GT2 2010-13
Porsche 997 GT3 2007-11
Diagram ref no 7
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99710506171
The product you are viewing cross references to these numbers
- Porsche 996 TURBO 2000-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 997 MK1 GT3 / GT3 RS 2007-09

Fits:
Porsche 996 Turbo 2001-05
Porsche 996 GT3 1999-05
Porsche 997.1 GT3 2007>>
Porsche 959
Click 'Zoom in' for large parts diagram.
Diagram ref no 11
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95910505204
The product you are viewing cross references to these numbers
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