Valve Guides, Removing and Replacing

Valve Guides, Removing And Replacing

Special tools, testers and auxiliary items
^ Drift 3121
^ 7 mm reamer 3120 and cutting fluid

Replacing

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

- Press worn guides out from camshaft side with drift 3121. Guides with shoulders (previously replaced) should be pressed out from the combustion chamber side.

- Lubricate new guides with oil.

- Press into cold cylinder head from camshaft side with 3121. Press in up to shoulder.

CAUTION!
After shoulder makes contact DO NOT increase pressure over 1.0 ton. Otherwise the shoulder can break off.

- Ream valve guide to size using reamer 3120 and cutting fluid.

- Reface valve seats.