Valve Guide: Service and Repair

Valve Guides, Removing and Installing

Special tools






- 3120 Reamer and cutter






- 3121 Driver

Removing

- Clean and check cylinder head. Cylinder heads in which the valve seats can no longer be reworked, or cylinder heads, which have already been machined to the minimum dimension, should not have the valve guides replaced.

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

Installing

- Press in new guides, moistened with oil, from camshaft side onto shoulder in cold cylinder head using drift 3121.

Note:

- Once the guide shoulder makes contact, DO NOT allow the pressure to exceed 2000 psi otherwise the guide shoulder could break off.

- Ream out guides with 3120 hand reamer using plenty of cutting fluid.

- Rework valve seats.