Valve Guide Servicing

Check valve guide for wear or damage. Replace defective guides by using a suitable drift and pressing out guide through top of head. Press in new guide from top of head until correct projection of guide above cylinder head is achieved (see Fig 1).

Fig 1: Valve Guide Position

Courtesy of SUBARU OF AMERICA, INC.

Ream valve guide to specifications with a suitable reamer. Check valve seat to see if it is true with guide. Reface valve seat if necessary.