2007 Chevrolet Colorado Valve Stem Oil Seal

You need to remove the camshaft cover, rotate the crankshaft until the affected cylinder valve is fully open, install the EN-47945 on the engine cylinder head using either one or two of the supplied fasteners installed in the coil fastener hole, rotate the engine clockwise enough to ensure the cam is on the base circle, remove the valve Rocker Arm and valve lash adjuster, then clean and inspect the valve rocker arm and valve lash adjuster.

You should lubricate the valve rocker arm and fill the valve lash adjuster with oil, then install the valve rocker arm and valve lash adjuster, rotate the engine counterclockwise enough that the cam lobe fully depresses the spring again, then remove the EN-47945 from the cylinder head and repeat as required, lastly install the camshaft cover.

You need to remove the intake manifold and the ignition coils, remove the fuel injector, the heated oxygen sensor (HO2S), and the engine coolant temperature (ECT) sensor from the camshaft cover, then remove the camshaft cover ground wire bolt from the cover, remove the ground wire from cover, the camshaft cover bolts, the camshaft cover from the cylinder head, the seals from the camshaft cover, finally clean and inspect the cylinder head sealing surface.