guide rail Genuine Porsche part 91110522207

Code: 91110522207

Genuine Porsche part

guide rail

Additional information:

• This part is brand new and unused.
• Please verify that it is 100% suitable for your specific vehicle before purchase to ensure compatibility.

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Chain guide rail, Black. Porsche 911 1966-89

91110522207/1

Product Information

Chain guide rail, Black.
This guide rail maintains correct chain alignment, reduces wear on the timing chain and sprockets, and helps ensure accurate cam-shaft to crank-shaft timing over the life of the engine. Manufactured to match the original Porsche geometry, this rail provides direct-fit installation and restores proper chain path, quiet operation and long service life.
Sold each, 5 required per car.

Fits:
Porsche 911 1966 - 1989

Diagram ref no 2

• Position: Timing gearcase — the guide rail that supports/locates the front timing chain (or chains), depending on engine version.

• Function: Guides the timing chain to prevent excessive slack, misalignment or premature wear; supports longevity and accurate timing performance.

The timing chain guide rail is a critical component in the timing system of air-cooled Porsche engines: if the guide is worn, cracked, warped or missing, it can cause chain vibration, accelerated wear of the chain/sprockets, timing errors, noise or even catastrophic engine damage. Replacing it with a proper rail ensures correct chain path, quieter operation and long-term reliability.

When and why to replace:
•  Timing chain slap or rattle is audible at startup or under load
•  Visible wear on the existing guide rail (grooving, cracking, deformation)
•  During engine rebuild or timing chain service when the covers are already open
•  High-mileage or track-used engines where timing-system components have extended service life.

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Related, superseded, cross reference or alternative numbers for comparison.

91110522207

91110522206

91110522207

The product you are viewing cross references to these numbers

5 5 5 5 5

Chain guide rail set. Porsche 911 1966-89

91110522207/1KIT

Product Information

Chain guide rail set.
This set is for total timing chain system renewal on Porsche 911/914/964 flat-six engines. It includes one brown-type guide rail (part number 91110522205) plus five black-type guide rails (part number 91110522207) - the exact quantities required for a complete timing-train overhaul. Each rail is manufactured to match Porsche’s original specification in material, geometry and wear profile.

SET OF 6, includes:
1 × Guide Rail Brown – part no. 91110522205
5 × Guide Rails Black – part no. 91110522207

Fits:
Porsche 911 1966 - 1989

Diagram ref no 2

• Function: Ensures proper timing-chain alignment, guides chain over sprockets and tensioners, controls chain path geometry, minimises vibration/noise and extends chain & sprocket life.

Over time, guide rails degrade through wear, cracking, distortion or mis-alignment. If any single guide rail is worn or old, you risk chain vibration or changing chain geometry - potentially causing chain noise, accelerated wear of sprockets, timing drift or even catastrophic failure. By replacing all six guide rails (1 brown + 5 black) as a coordinated set, you ensure:
• Uniform wear and material condition across the entire chain path
• Balanced chain ride, consistent tension and accurate timing
• Reduced noise, less chain slap or vibration
• Longer service life for chain, sprockets and tensioners
• Peace of mind during a major engine service or rebuild

When to replace:
• Chain noise or slap detected during start-up or under load
• Visual inspection shows grooves, wear tracks, deformation or cracked guides
• You are performing a full engine bottom end or top-end rebuild
• The engine has high mileage or you’re restoring to full specification

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

91110522207

91110522206

91110522205

91110522207

The product you are viewing cross references to these numbers

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guide rail Genuine Porsche part 91110522207