Valve Guides
- Check valve stem-to-valve guide oil clearance. Ensure valve guide inside diameter is within specification. See CYLINDER HEAD table under ENGINE SPECIFICATIONS.
- Completely disassemble cylinder head. Gradually heat cylinder head in water to 194°F (94°C). Using Valve Guide Remover (49-B002-005), drive valve guide out, working from combustion chamber side of cylinder head. Repeat procedure if required, keeping cylinder head hot so aluminum head will not warp.
- If required, install new circlip on guide. Using proper components of Valve Guide Installer (49-L012-0A0), adjust installer guide depth (dimension "L") to specification using depth micrometer or caliper. See VALVE GUIDE INSTALLED HEIGHT table. See Fig 1.
- Insert guide into pre-adjusted installer, and drive guide into cylinder head from camshaft side until guide circlip and/or installer contact cylinder head. Measure dimension "L" (guide installed height). See Fig 1 or Fig 2. If installed height is not within specification, adjust or replace valve guide or cylinder head as necessary. See VALVE GUIDE INSTALLED HEIGHT table.
VALVE GUIDE INSTALLED HEIGHT
| Application | In. (mm) |
|---|---|
| Intake | .72-.74 (18.3-18.9) |
| Exhaust | .66-.69 (16.8-17.4) |