Valve Guide: Service and Repair

Special Tools, Testers And Auxiliary Items
- 3120 Hand reamer and cutting fluid
- 3121 Drift

Removal
- Clean and inspect cylinder head

NOTE: New valve guides cannot be installed in cylinder heads having:
^ Valve seats that can no longer be reworked
^ Heads which have already been machined to the minimum dimension (height), refer to item -7- of Disassembly/Assembly. Service and Repair
^ Already have service version valve guides installed.





- Press out worn valve guides using 3121 from the cam side

Installation
- Coat new guides with oil and press in (from camshaft side) with 3121 (cylinder head cold) until valve guide shoulder bottoms out.
Cylinder head must lay flat during press operation

CAUTION: When valve guide shoulder makes contact, do not exceed 1 ton hydraulic pressure, otherwise the guide shoulder (on service versions) could break.

- Ream out guides using 3120 hand reamer and plenty of cutting fluid
- Rework valve seats, refer to Refinish. Service and Repair