GMC 12711967 CAMSHAFT ASM,OVERHEAD VLV

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The steps to remove the camshaft are as follows: 1. Remove the intake manifold. 2. Remove the rocker arms. 3. Remove the pushrods. 4. Remove the timing chain. 5. Remove the camshaft sprocket. 6. Remove the balance shaft drive gear. 7. Remove the fan, radiator, and condenser. 8. Store the lifters in a labeled box. 9. Remove the lifter retainer. 10. Extract the lifters from the bores using a special tool, magnet, or your fingers. 11. Remove the camshaft retainer plate. 12. Use three 6-inch long, 5/16-18 bolts as a handle to remove the camshaft from the block.

After installing the camshaft, the cooling system should be refilled, the oil should be changed, and a new oil filter should be installed before starting and running the engine.

The camshaft should be installed by lubricating the bearing journals and lobes with assembly lube, sliding it into the engine, and securing it with the camshaft thrust plate. The timing chain and sprockets, camshaft position sensor, and lifters should also be installed.

After installing the camshaft, you should: 1. Refill the cooling system. 2. Change the engine oil and filter. 3. Start the engine and check for leaks.

The steps for installing the camshaft are as follows:1. Lubricate the camshaft bearing journals and cam lobes with assembly lube.2. Slide the camshaft into the engine.3. Install the camshaft thrust plate.4. Install the balance shaft drive gear.5. Install the timing chain and sprockets.6. Lubricate the lifters with clean engine oil.7. Install the lifters in the block.8. Complete the installation in reverse order of removal.

The initial steps to remove the camshaft are disconnecting the cable from the negative battery terminal and relieving the fuel system pressure.