CLEANING
CYLINDER HEAD GASKET SURFACE PREPARATION
To ensure engine gasket sealing, proper surface preparation must be performed, especially with the use of aluminum engine components.
Never use the following to clean gasket surfaces:
Only use the following for cleaning gasket surfaces:
Fig. 136 Proper Tool Usage For Surface Preparation
1 - PLASTIC/WOOD SCRAPER
INSPECTION
(1) Inspect the cylinder head for out-of-flatness, using a straightedge and a feeler gauge. If tolerances exceed 0.0508 mm (0.002 in.) replace the cylinder head.
(2) Inspect the valve seats for damage. Service the valve seats as necessary.
(3) Inspect the valve guides for wear, cracks or looseness. If either condition exist, replace the cylinder head.