Valve Guide: Service and Repair

Valve guides, replacing

Special tools and equipment





^ 3121 Drift





^ 3120 Reamer and cutting fluid

Removing
- Clean and check cylinder head.

Note: 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 drift 3121 from camshaft side (repair versions with shoulder, 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: When the shoulder on guide makes contact the pressure must not exceed 10 kN (approx. 1.0 t) or the shoulder may break off.

- Ream valve guide using hand reamer 3120. Always use cutting fluid when reaming.
- Rework valve seats.