Chain Tensioner Adjuster. Porsche 986 / 996 / 987 / 997.1 2001-2008

Chain Tensioner Adjuster.

The Chain Tensioner Adjuster is an essential part of your engine’s timing system. Its role is to keep the timing chain under precise tension, ensuring smooth synchronization between the crankshaft and camshafts for accurate valve timing and dependable engine performance.
Over time, chain tensioners can weaken, leading to slack, noise, and timing irregularities. Left unchecked, this can cause severe engine damage. Replacing the adjuster restores proper chain tension, reduces rattling, and helps protect your engine from costly failures.

Fits:

• Porsche Boxster 986 2.7L 2001 - 2002
• Porsche Boxster 986 S 3.2 2001- 2002

Cars With Engine Codes:
M96.21 / M96.22 / M96.23 / M96.24

• Porsche Boxster 987 2.7L 2005 -08/08
  
• Porsche Boxster 987 S 3.2/3.4L 2005-08/08
  

Cars With Engine Codes:
M96.25 / M96.26 / M97.20 / M97.21 / M97.22

• Porsche Cayman 2.7L 987C 2006-08
  
• Porsche Cayman S 3.4L 987C 2005-08
  

Cars With Engine Codes:
M97.21 / M97.20 / M97.22

• Porsche Boxster 996 3.4L 2001
• Porsche Boxster 996 3.6L 2001- 2005

Cars With Engine Codes:
M96.01 / M96.02 / M96.03 / M96.04

• Porsche 997 Carrera 2 3.6L 2005>>
• Porsche 997 Carrera 2S 3.8L 2005>>
• Porsche 997 Carrera 4 3.6L 2005>>
• Porsche 997 Carrera 4S 3.8L 2005>>

Cars With Engine Codes:
M97.01 / M96.05

What This Product Does:
The chain tensioner adjuster is a key component in Porsche engines with timing chains. Its job is to keep the chain at the correct tension, ensuring the crankshaft and camshafts remain perfectly synchronized.

Functions:

• Maintains proper chain tension for precise valve timing.
• Reduces slack, vibration, and chain rattle.
• Prevents chain skipping or jumping teeth under load.
• Protects the chain, guides, and sprockets from premature wear.
  
  

Symptoms Of A Faulty Chain Tensioner Adjuster:

• Rattling or metallic noise from the timing chain area, especially at cold start.
  
• Engine light from timing irregularities.
  
• Engine misfires or rough idle due to incorrect valve timing.
  
• Loss of performance or efficiency.
  
• In severe cases timing chain failure, which can cause catastrophic engine damage.
  
  

Why Replacement Matters:
This part is critical to engine reliability. A worn or failing chain tensioner can lead to major timing issues, risking serious internal damage.
Replacing it ensures:

• Correct tension and timing accuracy.
  
• Reduced noise and vibration from the chain system.
• Long-term protection of the timing chain, guides, and engine.

It’s strongly recommended to replace the tensioner during timing chain service, rebuilds, or if early warning symptoms are present.

Diagram Ref No 35

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99610518058

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