Q:

How do you replace a car's timing belt?

A:

Quick Answer

In order to replace the timing belt on a car the coolant needs to be drained, timing belt covers, alternator pulley, crankshaft pulley, valve cover and old belt all have to be removed. After that, the timing belt will need to be properly adjusted and timed so the engine does not become damaged.

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Full Answer

The timing belt turns the cam-shafts on an engine, which opens and closes the valves. This occurs while the pistons move simultaneously missing the valves. If the timing is set incorrectly on interference engines, the valves will make contact with the piston and resulting in engine failure. Use the following steps to replace a timing belt in a car.

  1. Remove the hoses, valve cover and timing covers
  2. Drain the coolant to remove any heater hoses in the front of the engine. Remove the valve cover and timing belt cover.

  3. Remove the A/C pulley, belt and alternator belt
  4. Loosen the belt tensioners for the A/C pulley and alternator. Remove the belt for both components, some engine's may have a serpentine belt running throughout the system.

  5. Remove the crankshaft pulley
  6. Use a breaker bar to loosen the crank pulley bolt, then remove it. Next, remove the crankshaft pulley.

  7. Replace the timing belt
  8. Replace the timing belt, and adjust it to top-dead-center.

  9. Re-install removed components
  10. Re-install the A/C belt, alternator belt, crankshaft pulley, and other components that were removed. Before installing the valve cover, replace its gasket.

  11. Adjust the timing
  12. Check and adjust the timing belt until certain it is all set correctly, then torque everything down to the correct specifications for the particular car.

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