timing chain Genuine Porsche part 99610555271

Diagram ref: #1, #3, #18, #23, # 24, #27, #33

Diagram ref: #1, #3, #18, #23, # 24, #27, #33

This overhaul kit ensures your engine’s timing system is brought back to proper specification — chain, guides, rails, tensioning path — all refreshed in one package.

Fits:

• Porsche 996 TURBO 2000-05

• The timing chain system synchronises the crankshaft and camshafts (and sometimes intermediate shafts) so that valves open/close at the correct times relative to piston position.
• The chain itself drives the cam from the crank or intermediate shaft. Guides/rails ensure the chain runs in the correct path, stays under tension, and minimises noise and wear.
• Over time, the chain can stretch, guides can wear or fracture, tensioners can lose preload — which leads to timing slack, chain noise, and in worst cases mis-timing or catastrophic engine damage.
• A full kit replacing the chain and guides resets the timing system back to proper specification — chain path, tension, alignment — thereby restoring performance, reliability, and longevity of the engine.

• You hear rattling or clattering from the front of the engine (timing cover area) during start-up, idle or under load — a classic sign of chain slack.
  
• You experience poor engine performance, rough running or misfires linked to timing errors.
  
• The engine has high mileage or long service history with original timing components — wear is cumulative and replacing early can prevent failure.
  
• On inspection you find worn guides/rails (cracked plastic, split surfaces) or visible chain slack.
• You catch related diagnostic trouble codes (DTCs) for camshaft timing or intermediate shaft etc.

• Protects the engine: Timing chain failure can lead to valve-to-piston contact, major engine damage and huge cost. Replacing the chain system early is preventive.
  
• Restores correctly timed operation: With new chain/guides, your cam/valve timing is returned to spec; the engine runs smoother, more reliably, and with full power.
  
• Eliminates noise & improves reliability: Worn guides or slack chain produce unacceptable noise and indicate impending failure. Replacing resolves these.
  
• Cost-effective while open: Major labour is already required to access the timing chain; replacing only part of the system risks repeated labour later.