To remove intake manifold start with the removal of the valve covers then proceed to go around the head and loosen the 
Rocker Arm bolts before swinging the rocker arms to the side. In case they are to be reused, some pushrods should be withdrawn from the engine and put in a place in a manner that they will not be mixed with others by using the pushrod holder. Subsequently, it is possible to pull valve lifters from the engine and to unscrew the 
Timing Chain cover. Unthread the camshaft sprocket assemble in such a manner that the engine is not rotated when this is being done. Go on to take off timing chain and sprockets and the bolts that hold the camshaft thrust plate to the engine block. Gently pull out the camshaft out of the engine ensure that the cam lobes do not damage the bearings. For the operations for the camshaft and lifters as for an inspection procedure, the following specific shall be followed. For installation, it is recommended that the camshaft journals be oiled whereas the cam lobes be lubricated with engine assembly lube when slotting it into position though being careful not to damage the bearings. The camshaft thrust plate should be bolted and tightened to the necessary tension, and the timing chain, as well as both sprockets, should then be fitted. In case of utilizing original hydraulic valve lifters, those must be as fitted in the original cylinder, and must be treated with engine assembly lube. Reverse all the removal steps as part of the final steps and if the system has a camshaft position sensor then it should be installed.