Valve Guide: Service and Repair

Special tools





^ 3121 Drift





^ 3120 Reamer and cutting fluid

Removing
- Clean and check cylinder head.

Note: Do not replace the valve guides in cylinder heads where the valve seats can no longer be reworked, or cylinder heads, which have already been machined to the minimum dimension.

- Press out worn valve guides using 3121 from camshaft side (valve guides with shoulder - service version - from combustion chamber side).

Installing
- Press new guides in up to shoulder (lubricated with oil) from camshaft side in cold cylinder head using 3121 drift.

Note: When the valve guide shoulder makes contact, do NOT allow the pressure to exceed 2000 psi or the shoulder could break off.

- Ream out guides with 3120 hand reamer and plenty of cutting fluid.
- Rework valve seats.