GMC 10241692 Camshaft Asm

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The camshaft thrust plate should be installed with the dowel pin at 3 o'clock.

The final step is to lubricate the lifter bores with engine oil and install the lifters. Then, install the lifter guides and reinstall the cylinder head. Finally, install the pushrods, pushrod guides, rocker arms, and rocker arm retaining nuts, tightening the rocker arm nuts.

To determine the extent of cam lobe wear, position the number one piston at TDC on the compression stroke, remove the valve cover, and loosen the rocker arm nuts to access the pushrods. Then, mount a dial indicator on the engine, position the plunger against the top of the first pushrod, and zero the dial indicator. Slowly turn the crankshaft in the normal direction of rotation until the indicator needle stops and moves in the opposite direction, indicating maximum cam lobe lift. Record this figure and repeat the check for each valve.

Before starting the engine after camshaft installation, it is essential to change the oil and install a new oil filter.

After removing the camshaft, you should clean and inspect the bearing journals for damage. Measure the bearing journals and camshaft lobes. Check the lobes for discoloration, score marks, chipped areas, pitting, and uneven wear.

The camshaft thrust plate should be installed with the dowel pin at 3 o'clock.

The camshaft thrust plate should be installed with the dowel pin at 3 o'clock.

Removing the lifters requires removing the cylinder head. You should remove the lifter guides and extract the lifters using a special removal tool, magnet, or scribe.