Before taking off the cylinder heads, unbend the cable from the negative terminal of the battery, lift the vehicle on safety jack stands but first drain the cooling system and engine oil. Relieve the exhaust pressure by removing the exhaust pipe or pipes from the manifold or manifolds and lower the car. Playing it part by part, start by doffing the rocker arms and pushrods, the lower
Intake Manifold, and the exhaust manifold. Should one remove the front head, then the dipstick tube must also be pulled out by the removing bolt on the front cylinder head. The removal of the rear cylinder head involves the removal of the heater outlet hose as well as the heater core outlet hose attached to the heater outlet tube; thereafter you have to remove the tube by naked force by the mere use of a nut. Take out the engine coolant temperature sensor, and the engine hoist bracket. Make sure all those elements that keep interfering with the cylinder head are removed, then follow by the removal of the spark plug. When it is time to remove the cylinder heads, undo each cylinder head bolt a quarter of a turn in the reverse order of the sequence that was used in the tightening process until they can be fully undone by hand: discard the bolts because new ones are needed for reassembly. Pull the head(s) up and away from the engine gently, ensuring therefore to look for nuts/bolts that one might have missed, and may use sledge hammer and bar of wood in breaking the gasket so that one can pull the head(s) off. Upon, removal position the head on wooden blocks to protect the gasket surfaces. For installation, it is required for the two surfaces of each cylinder head and block to be free from contaminants; use of a gasket scraper to remove gasket debris accompanied by brake system cleaner. The lifter valley should be covered with shop rags to prevent any debris from getting in and all areas where block and head interface should be inspected, and any damage repaired. Wash the threads in the head bolt holes with a tap Then put the new gasket on over the dowel pins on the block make certain that the gap is on the right side up. Safely position the head on the block over the existing gasket, new cylinder head bolts should be inserted and tightened according to sequence in the recommended torque then each bolt should be turned to the prescribed angle. Reverse the process of removal and charge the cooling system, while on the same process change the engine oil and filter.