- Measure valve stem oil clearance. Replace valve guide if not within specification. See appropriate «VALVES & VALVE SPRINGS»(ref-26423-S09056945582001011500000) table under ENGINE SPECIFICATIONS.
- Using rod of Valve Guide Remover/Installer (MD998115) for SOHC, drive out valve guide toward combustion chamber side of cylinder head. Note length of valve guides. On DOHC, use press and appropriate driver to press valve guide out toward combustion chamber side of head.
- On all models, cylinder head must be bored to install oversized valve guide once guide is removed. DO NOT install valve guide of same O.D. as old guide. Bore cylinder head to specification for oversize valve guide. See appropriate «OVERSIZE VALVE GUIDE SPECIFICATIONS»(ref-26423-S28211789572001011500000) table.
- On SOHC, install proper length valve guide. Intake guide is 1.73" (43.9 mm) long; exhaust guide is 1.89" (48.0 mm) long. On all models, position cylinder head with combustion chamber downward.
- Using valve guide remover/installer, install valve guide. Remover/installer sets valve guide height on SOHC. On DOHC, install valve guide to .689" (17.5 mm), measured from cylinder head spring seating area to top of valve guide. On all models, ensure valve slides smoothly in valve guide. Recondition valve seat.
| Oversize - In. (mm) | Size Mark | Bore Size - In. (mm) |
|---|---|---|
| .002 (.05) | 5 | .5138-.5147 (13.050-13.073) |
| .010 (.25) | 25 | .5217-.5224 (13.251-13.269) |
| .020 (.51) | 50 | .5315-.5323 (13.500-13.520) |
OVERSIZE VALVE GUIDE SPECIFICATIONS
| Oversize - In. (mm) | Size Mark | Bore Size - In. (mm) |
|---|---|---|
| .002 (.05) | 5 | .4744-.4752 (12.050-12.070) |
| .010 (.25) | 25 | .4823-.4830 (12.251-12.269) |
| .020 (.51) | 50 | .4921-.4929 (12.500-12.519) |
OVERSIZE VALVE GUIDE SPECIFICATIONS