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Chain guide rail, Black. Porsche 911 1966-89 ❭ 91110522207
- 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)
This guide rail maintains correct chain alignment, reduces wear on the timing chain and sprockets, and helps ensure accurate cam-shaft to crank-shaft timing over the life of the engine. Manufactured to match the original Porsche geometry, this rail provides direct-fit installation and restores proper chain path, quiet operation and long service life.
Sold each, 5 required per car.
Fits:
Porsche 911 1966 - 1989
Diagram ref no 2
• Position: Timing gearcase — the guide rail that supports/locates the front timing chain (or chains), depending on engine version.
• Function: Guides the timing chain to prevent excessive slack, misalignment or premature wear; supports longevity and accurate timing performance.
The timing chain guide rail is a critical component in the timing system of air-cooled Porsche engines: if the guide is worn, cracked, warped or missing, it can cause chain vibration, accelerated wear of the chain/sprockets, timing errors, noise or even catastrophic engine damage. Replacing it with a proper rail ensures correct chain path, quieter operation and long-term reliability.
When and why to replace:
• Timing chain slap or rattle is audible at startup or under load
• Visible wear on the existing guide rail (grooving, cracking, deformation)
• During engine rebuild or timing chain service when the covers are already open
• High-mileage or track-used engines where timing-system components have extended service life.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91110522207
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 3.6L 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
Timing chain from the intermediate shaft to the heads.
Sold each, Two chains are typically required per engine, as each bank uses its own camshaft timing chain.
Fits:
Porsche 996 Carrera 3.6L 2002 - 2004
Porsche 987 Boxster / Boxster S 2005 - 2008
Porsche 987C Cayman / Cayman S 2005 - 2008
Porsche 997 Carrera 3.6L / S 3.8L 2005 - 2008 COUPE / CABRIO
Diagram ref no. 26
The timing chain transfers rotational movement through the engine’s timing system so the camshafts open and close the intake and exhaust valves at the correct moment in the combustion cycle. Accurate synchronization between the crankshaft and camshafts is essential for optimal engine performance, efficiency and reliability.
Replacing worn or stretched timing chains helps maintain correct valve timing and prevents potential engine damage caused by timing inaccuracies.
Function
• Engine Timing Synchronisation: Links the intermediate shaft and camshafts
• Valve Control: Ensures intake and exhaust valves operate at precise timing intervals
• Durability: Designed to withstand continuous high-speed engine operation
• Direct Replacement: OE Match construction ensures correct fit and performance
Timing chains operate continuously under high load and temperature inside the engine. Over time they may stretch or wear, which can lead to inaccurate valve timing, engine noise, or performance loss. Installing a new OE Match timing chain helps maintain precise engine timing, ensures smooth operation of the valve train and protects critical engine components from premature wear.
Consider replacing the timing chain when:
• Performing a major engine rebuild
• Servicing the timing system or chain tensioners
• Experiencing timing chain noise or rattle
• High-mileage engine maintenance
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610515201
The product you are viewing cross references to these numbers
- 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 3.6L 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 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT3 / GT3 RS 2007-09
- Porsche 997 MK1 GT2 2007-09
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
- Porsche Carrera GT 2003-06
Fits:
Porsche 996 C2 / C4 / C4S - 2002 to 2005
Porsche 986 Boxster 2.7ltr / 3.2ltr - 1997 to 2004
Porsche 987 Boxster - 2005 to 2008
Porsche 987C Cayman - 2005 to 2008
Porsche 997 - 2005 to 2008
Porsche Carrera Gt - 2004 to 2006
Diagram Ref No 41
This product supersedes Porsche's old part numbers:
99610530302, 99610530303, 99610530304, 99610530305, 99610530306, 99610530307
Common issues or symptoms:
Rough idle / misfires: Faulty actuator disrupts precise valve timing, leading to uneven idling or misfires.
Reduced engine performance: Loss of power or hesitation at certain RPMs can be linked to improper camshaft adjustment Check Engine Light (CEL), often triggered when the engine control unit (ECU) detects misalignment or malfunction in camshaft timing - very common with actuator failure.
Faulty actuator disrupts precise valve timing, leading to uneven idling or misfires Diagnostic Trouble Codes (DTCs): Codes like P0010, P0011, P0012, P0013, P0014 often point to camshaft actuator or timing issues. They indicate conditions such as stuck timing advance/retard, or electrical faults in the actuator circuit Failure Causes: Oil contamination or sludge can clog the actuator, impairing function. Electrical problems such as wiring degradation or poor connector contact can impede correct activation
Diagnostic & repair advice check oil quality and change intervals - fresh, clean oil helps prevent buildup that hampers actuator performance scan for and interpret fault codes using an OBD-II scanner to pinpoint actuator failure or control circuit issues Inspect connectors and wiring for corrosion or looseness Replace defective solenoid(s) with OEM or high-quality equivalents if internal stick or mechanical failure is suspected.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610530307
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 986 Boxster / S 1997-04 - x3 required
Porsche 987 Boxster / S 2005-08 - x3 required
Porsche 987 Cayman / S 2006-08 - x4 required
Porsche 996 Carrera 1998-05 - x3 required
Porsche 997-1 Carrera 2005-08 - x4 required
Diagram ref. 25.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99970734440
The product you are viewing cross references to these numbers
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