Valve Clearance: Adjustments

Fig. 8 Checking valve clearance:

1. Using feeler gauges, check valve clearance with cam lobe in position shown in Fig. 8. Engine should be at normal operating temperature, with thermostat open and coolant temperature approximately 195°F. If necessary to check valve clearance with cylinder head cold, use following specifications: Intake, .006 - .010 inch; Exhaust, .014 - .018 inch, then recheck after engine has reached normal operating temperature.
2. If valve clearance is greater than specified, remove valve adjusting disc and insert a thicker disc to obtain proper clearance.
3. If valve clearance is less than specified, remove valve adjusting disc and insert a thinner disc to obtain proper clearance.

Fig. 9 Valve adjusting disc replacement:

4. To replace valve adjusting disc, depress cam follower with tool L-4417 or equivalent and remove with a narrow screwdriver, Fig. 9, and a magnet. Install new disc and recheck clearance.
5. Valve adjusting discs are available in thicknesses of 3.00 mm to 4.25 mm in increments of .05 mm.