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- Porsche 971.1 Panamera 4S Diesel V8 4.0L 4WD (422 Hp) 2017-18
- Porsche 971.1 Panamera 4S Diesel 4.0L Twin-Turbo V8 Sport Turismo 2017-18
The IWIS Timing Chain is a replacement internal engine timing component for compatible Porsche applications. It forms part of the engine's mechanical timing system, transferring rotational drive and helping maintain precise synchronisation between associated engine components.
Fits:
- Porsche 971.1 Panamera 4S Diesel V8 4.0L 4WD (422 Hp) 2017-18
- Porsche 971.1 Panamera 4S Diesel 4.0L Twin-Turbo V8 Sport Turismo 2017-18
Diagram Ref No 16
The timing chain operates continuously whenever the engine is running, transferring rotational movement through the timing system and helping maintain the precise mechanical relationship required between associated engine components. Accurate timing is essential for correct valve operation, smooth combustion and dependable engine performance.
Although timing chains are designed for long service life, continuous mechanical loading, friction, heat and lubrication conditions can gradually cause wear to the chain pins, links and contact surfaces. Associated guides, tensioners and sprockets can also deteriorate. Excessive wear can increase chain slack, create abnormal mechanical noise and eventually affect timing accuracy.
What This Product Does:
The Timing Chain transfers mechanical rotation through the engine timing system and helps maintain the required synchronisation between associated rotating components.
Depending on the specific engine configuration, correct timing-chain operation helps support:
- Accurate mechanical engine timing
- Correct camshaft operation
- Correct valve timing
- Crankshaft and camshaft synchronisation
- Stable combustion
- Reliable engine starting
- Smooth idle
- Consistent engine performance
- Predictable throttle response
- Reliable power delivery
The chain must remain correctly tensioned, properly lubricated and accurately engaged with its sprockets to maintain reliable timing.
Symptoms Of Wear Or Failure:
Possible symptoms of deterioration within the timing chain or associated timing components include:
- Metallic rattling or clattering
- Timing-chain rattle during cold starts
- Rattle immediately after engine start-up
- Mechanical noise from the timing area
- Noise that changes with engine RPM
- Excessive chain slack
- Timing-chain elongation
- Excessive tensioner travel
- Rough or unstable idle
- Difficult or extended starting
- Reduced engine performance
- Poor throttle response
- Engine misfires
- Check-engine warning
- Timing-related diagnostic fault codes
- Camshaft-position faults
- Crankshaft/camshaft correlation faults
- Variable valve timing faults, where applicable
- Visible chain or link wear
- Worn or damaged timing-chain guides
- Abnormal sprocket wear
- Metal or plastic wear debris in the engine oil or filter
These symptoms do not automatically confirm that the chain itself is defective. Worn guides, defective tensioners, damaged sprockets, variable timing components, sensors, wiring or lubrication problems can produce similar symptoms.
Why Replacement Matters:
The Timing Chain performs a critical role within the engine timing system.
Replacing a confirmed worn, elongated or damaged chain can help:
- Restore accurate mechanical synchronisation
- Maintain correct engine timing
- Restore dependable timing-chain operation
- 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 potentially result in significantly more extensive engine damage.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9A710922931
The product you are viewing cross references to these numbers
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- 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>>
Porsche 986 Boxster 2.7L / 3.2L 1997-04
Porsche 987 Boxster 2005-08
Porsche 987C Cayman 2005-08
Porsche 997 2005-08
Porsche Carrera Gt 2004-06
This product supersedes Porsche's old part numbers:
- 99610530302
- 99610530303
- 99610530304
- 99610530305
Click 'Zoom in' for large parts diagram.
Diagram Ref No 41
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610530307
The product you are viewing cross references to these numbers
- Porsche 996 TURBO 2000-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT3 / GT3 RS 2007-09
- Porsche 997 MKII GT3 / GT3 RS 2010-11
- Porsche 997 MKII Turbo 2010-13
Fits:
Porsche 996 Turbo 2000-2005
Porsche 996 GT3-1 1999-2005
Porsche 997 Gen 1 Turbo 2007-2009
Porsche 997 Gen 2 Turbo 2010-2013
Porsche 997 GT3-2 2007-2011
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99614722371
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
Fits:
Porsche 996 Turbo 2001-05
Porsche 996 GT3 2000-05
Porsche 997 Turbo 2007-11
Porsche 997 GT3 2007-11
Click 'Zoom in' for large parts diagram.
Diagram ref no 21
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610516
The product you are viewing cross references to these numbers