Valve Clearance: Adjustments

ADJUSTING
Adjust valve clearance while engine is cold.
1. Turn crankshaft, to position cam lobe on camshaft of valve that must be adjusted upward.





2. Place Tool (A) around camshaft as shown in figure. Before placing Tool (A), rotate notch toward center of cylinder head (See figure.), to simplify shim removal later.

CAUTION: Be careful not to damage cam surface with Tool (A).





3. Rotate Tool (A) (See figure.) so that valve lifter is pushed down.





4. Place Tool (B) between camshaft and the edge of the valve lifter to retain valve lifter.

CAUTION:
^ Tool (B) must be placed as close to camshaft bracket as possible.
^ Be careful not to damage cam surface with Tool (B).

5. Remove Tool (A).





6. Blow air into the hole to separate adjusting shim from valve lifter.





7. Remove adjusting shim using a small screwdriver and a magnetic finger.
8. Determine replacement adjusting shim size following formula.





^ Using a micrometer determine thickness of removed shim.
^ Calculate thickness of new adjusting shim so valve clearance comes within specified values.
R = Thickness of removed shim
N = Thickness of new shim
M = Measured valve clearance
Intake: N = R + [M - 0.30 mm (0.0118 inch)]
Exhaust: N = R + [M - 0.33 mm (0.0130 inch)]
Shims are available in 64 sizes from 2.32 mm (0.0913 inch) to 2.95 mm (0.1161 inch), in steps of 0.01 mm (0.0004 inch).





^ Select new shim with thickness as close as possible to calculated value.





9. Install new shim using a suitable tool.
^ Install with the surface on which the thickness is stamped facing down.





10. Place Tool (A) as mentioned in steps 2 and 3.
11. Remove Tool (B).
12. Remove Tool (A).
13. Recheck valve clearance.

Valve clearance: