Valve Guide Servicing
- Check valve guide for wear or damage. Using a drift punch, drive defective guides out through top of head. Press in new guide from top of head until it projects .689-.709" (17.50-18.00 mm) for intake valves and .886-.906" (22.50-23.01 mm) for exhaust valves.
- Ream valve guide to provide correct clearance. Inspect valve seat to make sure it is true with guide. Reface valve seat if necessary.