Slide rail for timing chain, Left. Porsche 964 / 993  ❭  96410502900

Slide rail for timing chain. LEFT
The guide rail provides a stable pathway for the timing chain as it connects the crankshaft and camshaft, maintaining correct alignment under heat, load, and rotational forces.

Fits:
Porsche 964 1989 - 1994
Porsche 993 1995 - 1998

Diagram Ref No 16.

• Application: Timing chain guide (straight/left) used in the timing system on 964 and 993 models to direct the chain path and maintain tension.

The guide rail helps support the timing chain’s smooth movement, reducing slack and guiding it over sprockets and tensioners. It works hand-in-hand with the tensioner to maintain proper chain tension, which is critical for accurate valve timing, smooth engine operation, and longevity of the timing chain system. Without a properly functioning guide rail, timing chain wear accelerates, potentially leading to engine misalignment or failure.

Installed in the engine block or timing cover pathway, this rail contacts the timing chain and provides a friction-resistant surface that helps the chain track correctly as the engine runs. Over time, original rails can wear, fracture, or lose their smooth surface, increasing chain wear and noise. An OE Match guide rail restores the correct surface finish and dimensions for reliable chain guidance and engine timing control.

The timing system in your Porsche engine relies on precise chain routing and tension to synchronize the crankshaft and camshafts. A worn or damaged guide rail can lead to:
•  Excessive chain wear and noise
•  Incorrect valve timing
•  Accelerated wear on sprockets and tensioners
•  Potential engine performance issues or damage
Replacing worn guide rails restores proper chain guidance, reduces engine noise, and helps maintain reliable engine timing - especially important in high-performance engines where precision is critical.

Replace the timing chain guide rail if you notice:
• Rattling or unusual chain noise from the timing cover area
• Visible wear on the rail surface
• Chain slack or timing inconsistencies
• During timing chain or tensioner replacement
• After significant mileage or engine overhaul work

Related reference numbers
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96410502900

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