Valve Guides Service
- Check valve stem-to-valve guide clearance. See CYLINDER HEAD SPECS TABLE at end of article. Ensure valve stem diameter is within specification. Valve guide can be replaced if clearance exceeds specification.
- To replace valve guide, use hammer and Valve Guide Remover (J-37968-1). Drive valve guide from combustion side of cylinder head toward valve spring side.
- To install valve guide, heat cylinder head to 176-212°F (80-100°C). Using hammer and Valve Guide & Seal Installer (J-37968-2), drive valve guide into cylinder head until installer contacts cylinder head surfaced. Using Reamer (J-37971), ream valve guide.
CAUTION:
Valve guide installed height must be .45" (11.4 mm) above cylinder head surface.