End Play

1. Push camshaft toward rear of engine. Install Dial Indicator with Bracketry 100-002 (TOOL-4201-C) or equivalent so indicator point is on camshaft sprocket retaining bolt.

CAUTION: Prying against the camshaft sprocket with the valve train load on the camshaft can break or damage the camshaft sprocket. The rocker arm adjusting nuts must be backed off or the rocker arm seat bolt must be loosened sufficiently to free the camshaft. After checking the camshaft end play, adjust the valve clearance.

2. Zero the dial indicator. Pull camshaft forward and release it. Compare dial indicator reading with specifications. If end play is excessive, replace camshaft thrust plate.
3. Remove dial indicator.
4. After replacing camshaft thrust plate, check end play again. If it is still out of specified range, inspect camshaft, and camshaft sprocket for excessive wear.