bow Genuine Porsche part 96410501802

Chain tensioner adjuster. 
The OE Match timing chain adjuster (also known as a chain tensioner adjuster) is an engine timing component used in Porsche 964 and Porsche 993 models. These adjusters help maintain the correct tension in the engine’s timing chain system, ensuring accurate synchronization between the crankshaft and camshafts.

Fits:
Porsche 964 1989 - 1994
Porsche 964 Turbo 1993 - 1994 3.6L
Porsche 964 RS
Porsche 993 1994 - 1998

Diagram Ref no 9 and 10.

The OE Match versions correspond to Porsche reference numbers 96410507900 / 96410507901 (left side) and 96410508000 / 96410508001 (right side) and are designed as direct replacements for the original factory components.

The timing chain adjuster is part of the camshaft timing system used in air-cooled Porsche flat-six engines. The component works together with the timing chain tensioner and guide rails to keep the chain correctly tensioned as the engine operates.

Each engine uses separate left and right adjusters, depending on the cylinder bank.

The chain adjuster maintains the proper position and tension of the timing chain, preventing slack or vibration within the timing assembly. By keeping the chain properly tensioned, it helps ensure precise valve timing and smooth engine operation.

Replacing worn adjusters helps prevent timing chain noise, improves reliability and protects critical engine components from excessive wear.

Function
• Timing Chain Tension Control: Maintains proper tension in the camshaft timing chain
• Valve Timing Accuracy: Ensures correct synchronization between crankshaft and camshafts
• Engine Protection: Prevents chain slack, vibration and premature wear
• Smooth Operation: Helps eliminate chain rattle and timing instability

Timing components are constantly exposed to engine heat, oil pressure and mechanical load. Over time adjusters can wear or lose precision, leading to timing chain noise, unstable valve timing or reduced engine performance. Replacing worn chain adjusters ensures proper tensioning of the timing chain and helps protect the engine’s internal components.

Consider replacing the timing chain adjuster when:
•  Timing chain rattle or knocking noise appears
•  Performing timing chain or tensioner replacement
•  During engine rebuild or top-end service
•  High-mileage engines with original timing components


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Related, superseded, cross reference or alternative numbers for comparison.

9641050

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Slide rail for timing chain. LEFT



Fits:
Porsche 964 1989-94
Porsche 993 1995-98

Click 'Zoom in' for large parts diagram.
Diagram Ref No 16.

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

96410502900

The product you are viewing cross references to these numbers

Slide rail for timing chain.
RIGHT



Fits:
Porsche 964 1989-94
Porsche 993 1995-98

Click 'Zoom in' for large parts diagram.
Diagram Ref No 16.

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

96410503000

The product you are viewing cross references to these numbers

Engine Chain Cover. RIGHT



Fits:
Porsche 964 1989-94
Porsche 993 1994-97

Click 'Zoom in' for large parts diagram.
Diagram ref no 5

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

96410509404

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Chain tensioner blade.
This chain tensioner blade is an OE-Match replacement built to Porsche’s original specifications. It ensures proper timing chain tension, smooth operation, and reduced noise and wear within the engine’s timing system.
Fits left or right side, Sold each.

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

Diagram Ref 13

The tensioner blade maintains proper tension on the timing chain, keeping it securely in place as it runs between the camshaft and crankshaft sprockets. By guiding chain movement, it ensures smooth operation, accurate valve timing, and reduced friction and wear. It also minimizes chain noise, helping the engine run quietly and efficiently.

The tensioner blade is located inside the timing chain assembly. It is mounted against the chain path, where it works with the hydraulic chain tensioner to keep the chain properly aligned and tensioned throughout all engine speeds and loads.

Over time, chain tensioner blades can wear, crack, or deform due to constant stress, heat, and oil exposure. A failing blade may cause the timing chain to loosen, rattle, or fall out of alignment. This can result in inaccurate timing, loss of performance, or even major engine damage. Installing an replacement restores the correct fit and function. Ensures long-term reliability, smoother operation, and protection of engine health.

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

96410504302

The product you are viewing cross references to these numbers

Chain tensioner adjuster. Porsche 964 / 993



Fits:
Porsche 964 1989-94
Porsche 964 Turbo 1993-94 3.6L
Porsche 964 RS
Porsche 993 1994-98

Click 'Zoom in' for large parts diagram.
Diagram Ref no 9 and 10.

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

9641050

The product you are viewing cross references to these numbers

Chain tensioner blade. Fits left or right side.



Fits:
Porsche 964 1989-94
Porsche 993 1994-98

Click 'Zoom in' for large parts diagram.
Diagram Ref 13

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

96410504302

The product you are viewing cross references to these numbers