Timing chain - OPEN TYPE. Porsche 996 / 986 Boxster  ❭  99610517753

Timing chain - OPEN Type
This OE Match timing chain is an open-type replacement camshaft timing chain for Porsche 996 and 986 Boxster engines. It is designed to match the original-style fit and function, helping maintain correct valve timing and reliable engine operation.
2 per engine. Sold each. 

Fits:
Porsche 996 3.4L C2/C4 1998 - 2001
Porsche 986 Boxster 1997 - 2004

Diagram Ref No 26

The timing chain links the crankshaft and camshaft drive system, keeping the camshafts synchronised with engine rotation. This ensures the intake and exhaust valves open and close at the correct time, supporting smooth running, efficient combustion, and dependable engine performance.

Functions
• Drives the camshaft timing system
• Keeps crankshaft and camshaft timing synchronised
• Supports correct intake and exhaust valve timing
• Helps maintain smooth engine running and performance
• Replaces stretched, worn, noisy, or damaged timing chains
• Open-type design for service and engine rebuild applications
• OE Match replacement for timing chain repair or engine overhaul.

Why Replace This Part?
Timing chains are exposed to constant load, oil, heat, and high-speed operation. Over time, the chain can stretch, wear, become noisy, or affect accurate camshaft timing. A worn timing chain may cause rattling noises, poor running, timing faults, reduced performance, or engine management warning lights. Replacing the chain helps restore timing accuracy and supports long-term engine reliability.

When to Replace This Part
•  The timing chain is stretched, worn, noisy, or damaged
•  There is rattling from the timing chain area
•  Camshaft timing faults or related diagnostic codes are present
•  The engine is being rebuilt or overhauled
•  Chain guides, tensioners, sprockets, or rails are being replaced
•  The timing system has been dismantled for repair
•  As preventative replacement during major engine service

Where it fits on the car
This timing chain fits inside the engine timing chain system, forming part of the camshaft drive assembly. It runs within the engine timing case area and works with the chain guides, tensioners, sprockets, and camshaft drive components.

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Related, superseded, cross reference or alternative numbers for comparison.

99610517753

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