E70 E82 E88 E89 plastic Engine Timing System BMW Chain Guide 11317621099

1131 7621 099 Engine Timing Chain Guide  For BMW E90 E91 E92 E93 E60 E61 E83 E70 E82 E88 E89

1.Key Functions

1. Chain Guidance – Maintains the correct path for the timing chain.

2. Friction Reduction – Minimizes contact between the chain and other engine components.

3. Noise Reduction – Helps dampen operational noise from the timing system.

4. Extended Lifespan – Protects the chain and related components, enhancing durability.

2. Vehicle Compatibility

3. Key Features

• Precision Guidance: Optimized track design minimizes chain lateral movement.

• Wear-Resistant: Composite plastic with metal inserts for extended durability.

• Noise Reduction: Surface texture reduces operational noise.

• OEM Replacement: Direct interchange with BMW original parts, no modifications needed.

• Preventive Maintenance: Addresses common chain guide cracking/wear issues.

4. Working Principle

The timing chain guide is a critical component of the engine timing system, performing these functions:

1. Path Control: Guides the chain along its predetermined route to prevent deviation.

2. Tension Management: Works with the tensioner to maintain proper chain tightness.

3. Friction Reduction: Low-friction materials minimize chain wear.

4. Vibration Dampening: Absorbs high-speed chain vibrations to protect other components.

Worn guides may cause chain slack, timing misalignment, and potentially trigger engine warning lights, unusual noises, or valve damage.

5. Frequently Asked Questions (FAQ)

Q1: How to identify if the guide needs replacement?

• Ticking/rattling noises from engine front (more noticeable during cold starts)

• Timing-related fault codes (e.g., P0016)

• Visible cracks or plastic debris upon inspection

Q2: Should the entire timing system be replaced?

• Recommended to replace chain and tensioner simultaneously (especially above 100,000km) to avoid repeat labor.

Q3: Is ECU reset required after installation?

• Some models need adaptation reset (use diagnostic tool for initialization).

Q4: Can I install it myself?

• Requires special tools (e.g., camshaft locking pins). Incorrect installation may cause severe engine damage – professional installation strongly recommended.