Cylinder Head - Inspection

INSPECTION

1. Cylinder head must be flat within 0.1 mm (0.004 in.) (Figure 1).
2. Inspect camshaft bearing journals for scoring.




Figure 1 Checking Cylinder Head Flatness






3. Remove carbon and varnish deposits from inside of valve guides with a reliable guide cleaner.
4. Using a small hole gauge and a micrometer, measure valve guides in 3 places top, middle and bottom (Figure 2). Refer to ENGINE SPECIFICATIONS Replace guides if they are not within specification.
5. Check valve guide height (Figure 3).




Figure 2 Checking Wear on Valve Guide-Typical










Figure 3 Valve Guide Height