Valve: Testing and Inspection

1. Clean valves thoroughly and replace burned, warped and cracked valves.





Fig. 99

2. Measure valve stems for wear (Fig. 99). Refer to Specifications.

NOTE: Valve stems are chrome plated and should not be polished (Fig. 99).

3. Remove carbon and varnish deposits from inside of valve guides with a reliable guide cleaner.

Checking Valve Guides
1. Measure valve stem-to-guide clearance as follows:
2. Install valve into cylinder head so it is 15 mm (0.590 inch) off the valve seat. A small piece of hose may be used to hold valve in place.





Fig. 100

3. Attach dial indicator Tool C-3339 to cylinder head and set it at right angle of valve stem being measured.
4. Move valve to and from the indicator. Refer to Valve Guide Specification Chart.

NOTE: Replace cylinder head if stem-to-guide clearance exceeds specifications, or if guide is loose in cylinder head.





Valve Guide Specification Chart