Valve: Adjustments

Valve Clearance

Special Tools:

1. Disconnect battery ground cable.
2. Remove valve cover.

3. NOTE: Camshaft lobes must be directed 90 degrees or more away from valve tappets.





Insert feeler gauge under lobe at 90 degree angle to camshaft.
a. valve clearance intake (cold): 0.15-0.25 mm (0.006-0. 010 inch)
b. valve clearance exhaust (cold): 0.25-0.35 mm (0.010-0.014 inch)

Fig. 9 Valve Lifter Depression:

4. To adjust clearance, insert Tappet Compressor 303-344 (T89P-6500-A) under camshaft next to lobe and rotate down to depress bucket valve tappet.

Fig. 10 Lifter Holder Tool Insertion:

5. Insert Tappet Holder 303-545 (T96P-6500-AH), and remove compressor tool.

6. WARNING: EYE PROTECTION IS REQUIRED TO BE WORN DURING USE OF COMPRESSED AIR. FAILURE TO WEAR EYE PROTECTION COULD RESULT IN POSSIBLE PERSONAL INJURY.






Direct a jet of compressed air toward hole in face of valve adjusting spacer to lift the valve adjusting spacer off of the valve tappet.
7. Determine size of valve adjusting spacer by numbers on bottom face of valve adjusting spacer or by measuring with a micrometer. Install replacement valve adjusting spacer that will permit specified clearance. Refer to Specifications. Install valve adjusting spacer with numbers down. Make sure valve adjusting spacer is properly seated.
8. Release tappet holder by installing tappet compressor tool.
9. Repeat procedure for each valve by rotating crankshaft as necessary.
10. After all valve clearances are checked and/or adjusted, inspect all valve adjusting spacers to make sure that they are fully seated in their bucket valve tappets.
11. Inspect valve cover gaskets and replace if damaged.
12. Install valve covers and intake manifold.
13. Connect battery ground cable.