Chain guide rail, Brown. Porsche 911 1966-89  ❭  91110522205

Chain Guide Rail, Brown.
The OE Match Brown Chain Guide Rail is a high-quality replacement timing chain guide designed for Porsche engines. This essential component provides a smooth, low-friction running surface for the timing chain, helping to maintain correct chain alignment and tension while reducing wear within the engine timing system.

Fits:

• Porsche 911 1965-1968 2.0L / 912 SWB (F)
• Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
• Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
• Porsche 911 1978-1983 3.0L / SC
• Porsche 911 1984-1986 3.2L
• Porsche 911 1987-1989 3.2L G50
• Porsche 911 1975-1977 3.0L Turbo (930)
• Porsche 911 1978-1989 3.3L Turbo (930)  

Manufactured from durable wear-resistant material and engineered to OE specifications, this brown chain guide rail is designed to withstand constant contact with the timing chain under high temperatures and demanding operating conditions. It is an important service item during engine rebuilds, timing chain maintenance or timing system overhauls.

What This Product Does:

• Guides and supports the engine timing chain during operation.
• Maintains correct timing chain alignment.
• Helps reduce chain vibration and movement.
• Provides a low-friction wear surface for the chain.
• Supports accurate camshaft and crankshaft timing.
• Contributes to smooth engine operation and long-term reliability.

Symptoms Of Wear Or Failure:

• Timing chain rattling or excessive chain noise.
• Increased engine mechanical noise during start-up.
• Visible wear grooves or scoring on the guide surface.
• Cracked, chipped or broken guide material.
• Excessive timing chain movement.
• Accelerated timing chain wear.
• Inconsistent timing system operation.
• Plastic debris or guide material found during servicing.

Why Replacement Matters:

• Chain guide rails operate under constant load as the timing chain moves at high speed throughout the engine's operating range. Over time, the guide material can wear, harden, crack or become brittle due to heat cycles, oil exposure and age.
• A worn chain guide rail can allow excessive chain movement, increasing stress on the timing chain, sprockets and tensioners. If guide deterioration becomes severe, fragments may break away, potentially leading to accelerated timing system wear and costly engine repairs.

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Related, superseded, cross reference or alternative numbers for comparison.

91110522205

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