Chain guide set. Porsche 986 Boxster 1997-02 / 996 3.4L 1998-01  ❭  99610517353KIT

Timing Chain Guide & Tensioner Guide replacement set, consisting of:
2x  99610517353/1 - OE Match Timing Chain Guides
2x  99610517552/1 - OE Match Timing Chain Tensioner Guides
Manufactured to closely replicate the original Porsche components, this set provides a complete replacement for the timing chain guide and tensioner guide wear surfaces on compatible Porsche engines.

Fits:
Porsche 986 Boxster  2.5L / 2.7L / 3.2L 1997 - 2002
Porsche 996 3.4L 1998 - 2001

Diagram Ref No 33 & 30

The timing chain guide & tensioner guide set includes four precision-engineered plastic guides designed to match the original Porsche timing system components in fit, shape, and performance. When installed, these guides support the timing chain and help maintain correct chain tension and alignment throughout engine operation.

The timing chain guides and tensioner guides provide support and controlled routing for the timing chain, keeping it properly positioned as it rotates over the cam and crank sprockets. They work with the hydraulic tensioner to maintain correct chain tension, helping preserve accurate valve timing and reduce chain slack or noise.

Function:
• Timing Chain Guides (OE ref no 99610517353): Provide a wear-resistant surface that the timing chain runs against, supporting proper alignment and reducing chain vibration.
•   Tensioner Guides (OE ref no 99610517552): Work in conjunction with the timing chain tensioner to keep chain tension stable, absorbing dynamic loads and preventing slack or chain chatter.
Together, the guides help ensure smooth, quiet chain operation, accurate timing, and long-term engine reliability.

Timing chain guides and tensioner guides are wear items in Porsche engines. Over time, original guide surfaces can wear, crack, or generate plastic debris due to heat and friction. Worn guides can lead to chain slack, noise, inaccurate valve timing, or accelerated chain and sprocket wear. Replacing them with OE Match components restores proper chain support, reduces operational noise, and helps protect expensive internal timing components.

When to replace:
•  During timing chain service or overhaul
•  If timing chain rattle / noise is detected at start-up or idle
•  When engine has high mileage
•  If prior guides show wear, cracking, or plastic debris
•  As part of preventive maintenance on performance or daily-use engines

Related reference numbers
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99610517353KIT

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