Valve Guide: Service and Repair

NOTE: Cylinder heads with valve seats that can no longer be refaced, or which have already been machined to the minimum dimension, should no longer be repaired.





1. Press out worn valve guides from camshaft side using drift tool No. 10-206, or equivalent.

NOTE: Replacement guides with shoulder must be pressed out from combustion chamber side.

2. Coat new guides with oil and, using drift tool No. 3121, or equivalent, press into cold cylinder head from camshaft side until shoulder makes contact.

NOTE: When the shoulder on the new guide makes contact, the pressing force must not exceed 1.0 ton or the guide shoulder could break off.

3. Use 7mm reamer tool No. 3120, or equivalent, to ream new valve guides to size, using plenty of cutting fluid.