Valve Clearance: Notes

Adjust valves with engine at normal operating temperature. Remove accelerator linkage and cylinder head cover. Clearance adjustments are to be checked and made according to firing order sequence (1-2-4-5-3). Rotate crankshaft until cam lobes for No. 1 cylinder valves point upward; then measure valve clearances of No. 1 cylinder.
NOTE: When adjusting valves, turn engine CLOCKWISE only, or timing belt may slip.
If adjustment is necessary, use special tools US 4476 (disc removal tool) and 2078 (tappet depressing tool) to remove and install adjusting discs. Turn tappet until notches are at 90° to camshaft. Insert tool 2078 and depress tappet. Using tool US 4476, grasp tappet disc and rotate it out from under camshaft.
Thickness is stamped on bottom side of disc. Using clearance measurement, determine thickness of adjusting disc necessary to bring valve clearance within specifications. Discs are available in 0.0019" (.05 mm) increments from 0.1181 - 0.1673" (3.0-4.25 mm). Repeat procedure as required for remaining valves.

Valve Clearance Specifications(1)