GM 11588728
Alternator Bolt

When working on the valve stem sealed and valve spring a dorsal Crankshaft rotation preventions is first needed before using compressed air in a cylinder so the flywheel holding tool (J 43653) stays safe. You should keep manual transmissions in first gear and set the parking brake while automatic transmissions must have their Starter removed. To start the process insert the flywheel holding tool (J 43653) and then take out both the Camshaft and its rocker arms. Place the valve spring compressor (J 43649) parts onto the second Camshaft cover bolt hole and fit the others to the Cylinder Head. Place an Air Hose adapter into the Spark Plug opening and connect an Air Hose. Activate the pressure to 690 kpa (100 psi) into the cylinder. Our tool j 43649 with its compressor lets you compress the valve spring. Afterwards take off the keepers and their components before removing the valve spring. Use the valve guide seal remover (J 36017) to uninstall and replace a valve seal using this same tool while confirming complete valve guide contact. After putting back the valve spring parts use the valve spring compressor (J 43649) once more to compress and set the valve keepers into position. Detach the Air Hose while uninstalling the valve spring compressor (J 43649). Place new spark plugs then reinstall Camshaft roller followers and the Camshaft. Afterward detach the flywheel holding tool (J 43653) if present and put back the Starter.

Before installing the flywheel holding tool (J 43653) the Crankshaft needs to stay locked in its position because applying compressed air in the cylinder risks hurting the tool. Place vehicles with manual transmission in first gear and activate the parking brake while vehicles with automatic transmission should detach the Starter. Install the flywheel holding tool j 43653 first and remove the Camshaft plus associated roller components. Fit the valve spring compressor tool j 43649 to the cylinder head and take out the spark plugs from each cylinder. Push an air hose connector into the Spark Plug hole until the cylinder reaches 690 kpa (100 psi). To access the valve you must squeeze the spring until you can take off both valve spring keepers and the valve spring. To take out the valve seal use the valve guide seal remover tool j 36017. Insert the valve guide seal remover tool (J 36017) firstly then replace the valve spring to finish the installation. Reapply pressure on the valve spring then put back the spring keepers. Pull out the Spark Plug hose adapter and unfasten valve spring compressor tool j43649 from the cylinder head. Place back the spark plugs along with Camshaft roller followers plus Camshaft. Put back the Starter part if taken out then complete the process by removing the flywheel holding tool (J 43653).