Both keep the crankshaft and camshaft in time. They age differently, and the maintenance gap between them can be large.
In this article
- Timing belts
- Timing chains
- What to do
Timing belts
A rubber belt with teeth. It usually needs replacing between 60,000 and 100,000 miles, and a failure can wreck the engine.
| Type | Typical life | Cost to replace |
|---|---|---|
| Belt | 60,000 to 100,000 mi | $500 to $1,200 |
| Chain | Often engine life | $1,000 to $2,500+ |
| Water pump (belt-driven) | With belt | $100 to $300 |
| Tensioner | With belt | $50 to $200 |
Intervals and costs are typical ranges. Your owner’s manual comes first.
Timing chains
A metal chain inside the engine that is often meant to last the engine’s life. Chains can stretch, and tensioners can fail.
A cheap belt can stop an expensive engine.
What to do
Check your car’s interval in the manual. When you replace a belt, replace the water pump and tensioners at the same time.
Do it in this order
- Look up your car’s interval
- Check service records
- Replace pump with belt
- Listen for rattles from a chain
Practical tip
When buying a used car with a belt, ask for proof of the last change. A missed one can mean a $3,000 repair.
Bottom line
Know whether your car has a belt or chain, and stick to the schedule.
Specifications, prices and rules change. Confirm current details with the manufacturer or the relevant authority before you buy or repair.
