Valve Guide: Service and Repair

Valve Guides, Replacing

NOTE:
- Clean and check cylinder head.
- Cylinder heads on which the valve seat surface can no longer be refaced, valve guides have been previously installed, or cylinder heads that have been refaced down to the minimum dimension cannot be repaired further.




- lay cylinder head flat on workbench
- press worn valve guides with tool 3121 from camshaft side

CAUTION! Once guide shoulder is seated do not use more than 1 ton pressure or guide shoulder may break off.

- coat new guides with oil and press into cold cylinder head to the shoulder from camshaft side with tool 3121
- ream valve guides by hand with reamer 3120
- use proper cutting lubricant

- reface valve seats