This will require buying a new set of head bolts to complete this procedure and enable study of the causes of failure. This process should be started by removing the cable of the negative terminal of the battery, and, further, by draining the engine coolant, as well as the charge air cooler in the supercharged version. When using a hoist to remove the supercharger you will need to remove the hood for LS9 engines. Thirdly, take out the drivebelt and spark plugs when necessary. For LS1, LS6, LS2, LS7 and LS3 (non-supercharged) engines, remove the
Intake Manifold and the coolant bleed pipin g mounting bolts and pipe. On LS9 engines, take off the supercharger, supercharger belt tensioner, and PS pump and bracket. Move on to disconnect the air bleed pipe and the valve covers and going on to the
Exhaust Manifold(s) and the
Rocker Arms and the
Pushrods should be removed while ensuring that all theparts are saved for reuse. Unfasten the head bolts in a criss-cross manner and a quarter turn at a time in reverse of the sequence routinely used until they can be unscrewed manually; discard these used up bolts for new ones needed for tightening during reassembly. The head bolts also come in different lengths and sizes and used in different part of the vehicle hence do well to note their positions. Unbolt the heads gently and lift the heads off the engine if there is some amount of friction with a pry bar or long screwdriver inserted in the intake port , the heads should be placed on wooden blocks so that it will not be damaged. When setting the new cylinder head it's very important that the mating surfaces of cylinder heads and block are free from any contaminants, it advisable to use a scraper but make sure you don't dig into the aluminum. Ensure that the faces that are to make contact have no nicks, deep scratches, or other potential sources of trouble; for slight manifestations of this, use a file; for severe manifestations, call a machine shop. In case one believes there is some warpage, one should use a straight edge to check for distortions. Cleam all surface with mating and head bolt holes especially the upper portion of the block, or the metal surface that will face the cylinder head. Located the new gaskets over the dowels in the block in such a manner that the mark on the gasket is in front of the vehicle, very carefully put the heads on the block in such a manner that they do not affect the gaskets' positions. The new head bolts should be fitted in the conduits and tightened to be just finger-tight and the same should always be replaced with new ones. After tightening the bolts according to the recommended sequence, turn them to the necessary torque and the number of turns. Bolt the coolant bleed pipe with new O-rings onto the cylinder heads then tighten the bolts of the new coolant bleed pipe. The rest of the installation is the mirror image of the removal. Last, put coolant, replace the engine oil and filter, engage the engine, and examine for optimal working and signs of leakage.