Valve Guide Replacement

^ Tool(s) Required
- J 37968 Valve Guide Remover/Installer
- J 37972 11 mm Valve Guide Reamer
- J 43842 Valve Guide Remover/Installer
- J 38342 6 mm Valve Guide Reamer





1. Tap out the valve guide from the combustion chamber side of the cylinder head using a hammer and the J 37968.





Notice: Clean the valve guides before reaming. Packing of chips or carbon may result in the reamer jamming into the valve guide or broken reamer flutes.

2. Ream the valve guide bore with the J 37972 11 mm reamer (1).





3. Gradually heat the cylinder head to 80-100°C (176-212°F).





Important: Intake and exhaust valve guides are identical. The new valve guide is 0.03 mm (0.0012 inch) oversize. Intake and exhaust valve guides should protrude 13.5 mm (0.53 inch) above the cylinder head surface.

4. Tap the new (oversize) valve guide into the cylinder head from the camshaft side using the J 37968, the J 43842 and a hammer.
5. Install the valve guide to the specified protrusion height of 13.5 mm (0.53 inch). The J 43842 should bottom out on the cylinder head when the specified protrusion height is reached.





6. Ream the new valve guide with the J 38342 6 mm reamer.