DIY: Replace Your Timing Belt
Installation:
Caution: Do not rotate the crankshaft or camshaft after removing the timing belt unless it's necessary to correct a timing mark misalignment. This could cause engine damage on an "interference" design engine.
- Compare the old and new timing belts. Compare the shape of the belt teeth, the spacing between the teeth, and the width of the belt.
- While the belt is off, check the cam and crankshaft sprockets for wear or damage. Replace them if any damage is found.
- Slide the new timing belt into position on the sprockets.
CAUTION: Do not force a new timing belt over the sprockets. If the belt won't slide easily check to make sure the belt tensioner is fully released. Timing belts are strong in their correctly installed position only. Do not bend or twist them into any configuration other than the correct one.
- Loosen the bolt(s) holding the timing belt tensioner and allow it to contact the belt.
- Proper timing belt tension is essential. Adjust the timing belt to the correct tension, following the procedures for your specific vehicle as outlined in your service manual.
- After the belt tension is properly adjusted, verify the timing marks on the cam, crank, and accessory sprockets are still in alignment.
- With a wrench on the crankshaft pulley, turn the engine over by hand at least two complete revolutions in its normal direction of travel returning to the 0° mark. This will help seat the new belt into place on the sprockets. On "interference" engines, it will also allow you to feel for any hard resistance that may indicate pistons and valves coming into contact.
- Verify the position of all timing marks.
- Reinstall the timing covers and tighten the attaching bolts or screws securely.
- Reinstall the components and drive belts that were removed to gain access to the timing cover.
- Reconnect the negative battery cable.
- Start the engine and verify proper operation.
That's it, you're done. The average time for this job is from three to four hours. Some vehicles will take somewhat longer, especially for a V-6 engine. By doing it yourself, you'll save anywhere from $250.00 to $400.00.
Copyright © 2001 - 2003 Vincent T. Ciulla All Rights Reserved
