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Porsche > 997 (911) MK1 2005-2008 > Engine Rebuild Parts > Chains & Tensioners >

Timing Chain. Porsche 997 Turbo/GT2 MKI / MKII 3.6L M97.70 2007-11  ❭  99710555171

Timing Chain. Porsche 997 Turbo/GT2 MKI / MKII 3.6L M97.70 2007-11 - 99710555171
3
Related to Chains & Tensioners for 997 (911) MK1 2005-2008
Special Order item
99710555171
Product Information
Product Information
Timing Chain.
Genuine Porsche duplex timing chain for 911 997 Turbo/GT2 MKI / MKII 3.6L M97.70 2006-2011 – replaces stretched or worn chain to restore precise engine timing.
Sold Each.
x2 Required Per Car.

Fits:
  • Porsche 997 MK1 TURBO 2007-09
  • Porsche 997 MK1 GT2 2007-09
  • Porsche 997 MKII Turbo 2010-11
  • Porsche 997 MKII GT2 RS 2011-11

Diagram Ref No 29

What This Product Does:

  • The timing chain transfers rotational motion from the crankshaft or intermediate shaft to the camshaft(s) (and/or to the secondary shaft) allowing valves to open and close in synchrony with piston movement.
  • A “duplex” chain (two rows of links) provides greater strength and durability under the high loads and high engine speeds typical of a Porsche 911 performance engine.
  • Because the chain drives critical timing, any slack, wear or movement will affect valve timing, ignition timing, engine management, and can result in noise, performance loss or engine damage.
  • In this context, this chain is often replaced as part of a full timing drive overhaul (including guides, rails, tensioners) rather than alone.

Symptoms & When You Should Replace:
  • Rattling or clattering noise from the front of the engine (timing cover area), often heard at idle or on start-up — typical of chain slack.
  • Check engine light related to camshaft or timing chain position sensors, or codes showing timing deviation.
  • Loss of engine power, mis-firing, rough running — could indicate timing drift due to chain wear.
  • High mileage or older engine with original chain: preventive replacement recommended to avoid catastrophic failure.
  • During major engine service (removing timing cover, replacing chains/guides) — because labour is high, replacing the chain proactively makes sense.
  • If inspection reveals visible wear: elongated chain links, damaged chain guides or missing/broken tensioner components.

Why Replacement Matters:
  • Protects the entire engine: A failed timing chain can lead to valve-to-piston contact, major damage and extremely costly repairs — replacing the chain is preventive.
  • Restores proper timing & performance: A new chain ensures correct valve and ignition timing, helping engine run smoothly, powerfully and reliably.
  • Eliminates noise & wear risk: Worn chains and guides cause noise and degrade timing drive integrity — a new chain reduces risk and improves sound.
  • Cost-efficient when engine is opened: Since accessing the chain involves removing major parts (timing cover, possibly front of engine), replacing the chain while it’s open saves re-labour.



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This product supersedes Porsche's old part numbers:
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Click 'Zoom in' for large parts diagram.
Diagram Ref No 41

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Fits:
Porsche 987 Boxster MKI 2005-08
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Porsche 997 Carrera MKI 2005-08
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Click 'Zoom in' for large parts diagram.
Diagram ref no 34

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Fits:
Porsche 986 Boxster 2.7L /  3.2L  2003 - 2004
with Engine codes: M96.23 / M96.24

Porsche 987 Boxster 2.7L / 3.2L / 3.4L 2005 - 2008
with Engine codes M96.25 / M96.26 / M97.20 / M97.21 / M97.22

Porsche 987C 2.7L / 3.4L Cayman 2006 - 2008
with Engine codes  M97.20 / M97.21 / M97.22

Porsche 996 3.6L C2 / C4 / C4S 2002 - 2005
with Engine codes M96.03

Porsche 997.1 3.6L /3.8L  2005 - 2008
with Engine codes M96.05 / M97.01

Diagram Ref No 33.

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