Engine
Timing Chain System
A timing chain synchronizes the camshafts and crankshaft — it usually lasts the life of the engine.
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Combustion flow
Interactive — tap a partTap a part to see how it fits in the system.
What it does
- Drives the camshafts from the crankshaft
- Lubricated by engine oil
- Silent compared to a belt
When it fails
- Rattle on cold start
- Chain noise that follows RPM
- P0011–P0017 codes
- Low oil pressure
How to diagnose
- Listen for cold-start rattle
- Check oil level and pressure
- Verify cam/crank correlation
- Check chain stretch with a scope
Maintenance
- Keep oil changed — chains die on dirty oil
- Replace chain, guides and tensioner together
- Some engines are known for premature stretch
Use the diagnosis order. When a part fails, confirm each hypothesis with measurements before replacing anything — codes and symptoms overlap.
Related part
Timing Belt / Chain
The timing belt or chain keeps the crankshaft and camshaft synchronized for correct valve timing.