Timing belt

Timing is everything

The timing belt is an essential part that synchronizes the timing of your vehicle’s combustion process. First, the pistons travel up and down in the cylinder, then intake valves open at the right time to let in air fuel. After, they close at the right time to allow the fuel to burn, then the exhaust valve opens at the right time to let out the exhaust. And it all happens a thousand times a minute.

Regular inspections save a lot of money

Timing belts wear out naturally over time and a worn or broken timing belt can cause very expensive engine damage. The timing belt should be replaced according to the manufacturer’s recommendations–usually every 100,000 km.

Replacing a timing belt is one of the most expensive routine maintenance items on your service schedule. That said, not replacing your timing belt can lead to some of the most expensive repairs you may ever have. Regular inspection is essential.


On some engines, the water pump is driven by the timing belt as opposed to the serpentine belt. In that case, it’s a good idea to replace the water pump at the same time as the timing belt and vice versa, since much of the same work has to be done for both these components. The same is true for the timing belt tensioner. It should be inspected and possibly replaced.

Your certified NAPA AUTOPRO technician can replace the timing belt according to extremely specific parameters and repair any engine damage.

Don’t fall out of sync

A broken timing belt will cause your vehicle to break down immediately. The worst case is when a valve opens at the wrong time and collides with the piston. The result is bent valves and maybe even more damage to the cylinder head. It is difficult to diagnose a worn timing belt.
Here are some common signs:

  • The engine won’t start
  • Squealing sounds from the engine
  • The engine misfires or runs roughly
  • Ticking and/or clicking sounds from the engine
  • Oil leaking at the front of the engine
  • The check engine light is on

If you recognize any of those signs, contact your NAPA AUTOPRO technician for maintenance.

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