Valve Guide: Service and Repair

1. Using service tool SA9126E, or equivalent, and a hammer, drive out the valve guide(s).
2. Inspect the bushing bore for scoring. If heavily scored, machine the bore to oversize dimensions to remove scoring.





3. Using a ball gauge, measure the guide bore diameter of the cylinder head. If the bore is 11.337-11.368 mm (.4467-.4479 inch) install standard size valve guides.
4. If the bore diameter of the cylinder head is more than 11.368 mm (0.4478 inch), use the large reamer in kit SA8126E and machine the bore to the following dimensions to install an oversized bushing (11.587-11.613 mm [0.456-0.457 inch]). If the bushing bore diameter of the cylinder head exceeds 11.613 mm (0.457 inch), replace the cylinder head.








5. Using the driver in kit SA9126E, or equivalent, and a hammer, drive in a new valve guide bushing.

CAUTION: Do not oil or use any thread locking materials when installing valve guides.





6. Using the two sharp reamers from kit SA9126E, ream the valve guide bushing to obtain the specified clearance between the valve guide bushing and the new valve stem.

CAUTION: Two special reamers are required to ream the guide. Oil the reamer with SAE 5W30 SG engine or cutting oil. Slowly drive the small reamer through the valve guide bore first with a 1/2 HP drill motor set at 500 rpm. Check the valve guide bore to valve stem clearance. If required, slowly drive the second (larger) reamer through the guide to obtain the specified clearance. Make sure the reamer flutes are clean prior to reaming each guide.