The camshaft, for instance, cannot be pulled out of its place when the
Cylinder Head is still fitted in the car. Start by taking out all the cylinder heads and the
Rocker Arm assemblies. Subsequent to this, remove the Camshaft position sensor and then gently pull the camshaft out through the rear opening of the cylinder head without harming the camshaft lobes or bearing journals in any way. Following removal, unscrew the/each seal from the camshaft(s) and wash them as well as the gasket surface. Camshaft lobes, and bearing journals, and seal contact surface should be checked for excessive wear or possible damage A camshaft end play that has increased or the camshaft bearing surface in the cylinder head has develop scoring or other unacceptable wear patterns. Check the camshaft bearing journal diameters with a micrometer while the inside diameter and face runout of the bearing surfaces in the cylinder head should be checked with an Artist PA-350 telescoping gauge. Deduct the journal measurement from the bearing measurement and establish the camshaft bearing oil clearance to compare this also. Clean the camshaft journals and apply clean engine oil to it and install the camshaft back in the cylinder head and the camshaft sensor. Mount a dial indicator to measure the camshaft end play and then check from the standard value of the camshaft. If any inspection reveals failure replace the camshaft, and in the case of worn out lobes also replace the rocker arms. Camshaft bearing surfaces in the head may be damaged or excessively worn or end play may be excessive so that cylinder head must be replaced. Before fitting, the journals of the camshaft should be cleaned before sliding some assembly lube or engine oil on the journals, lobes, and thrust areas and then slowly fitting the camshaft in the cylinder head. Place new camshaft oil seal and Camshaft Position sensor, cylinder head, rocker arm shaft assembly and
Timing Belt with covers. Last but not the least step is to start the engine and look for oil leaks.