End Play

CAUTION: Prying against the camshaft sprocket (6256) with the valve train load on the camshaft (6250) 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.

1. Push camshaft toward rear of engine. Install Dial Indicator with Bracketry TOOL-4201-C or equivalent so indicator point is on camshaft sprocket retaining bolt.
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 (6269).
3. After replacing camshaft thrust plate, check end play again. If it is still out of specified range, inspect camshaft and cylinder head and/or cylinder block (6010) for excessive wear.
4. Remove dial indicator.