GM 19308036 Spark Plug Asm

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On V6 models, the spark plugs are in the center of the valve covers, while those of VB models are to the left and right of the engine. Equipment required for spark plug replacement includes a definite spark plug socket that fits a ratchet, various bars, and a gap gauge for testing gaps of the new spark plug, with a torque wrench advisable for a tightness of the plug. New plugs should be bought ahead of time, installed using a gap convenient for the engine type, and put in one by one to acquire the correct plug for the singular engine. Therefore it is recommended to let the engine to cool before any plugs are removed in order not to harm the aluminum cylinder heads and inspect the new plugs for defective ones as well as their gaps. The gap is controlled by fitting the correct thickness of gauge into the tip of the plug, before the wire can be slid between the electrodes it should just drag slightly. All of the ignition coils for V6 engines are located underneath the upper intake manifold and as usual begin by having to remove the upper intake manifold to accesses all of the coils for the engine, next, unplug the wiring harness from each coil, and unscrew the retention bolts which releases the ignition coils from the valve cover. On V8 engines, with the engine off and cooled down: pull on the spark plug wire boot only and twist if needed to remove it from one of the plugs. In case compressed air is available, it should be used to blow of the spark plug hole to see that no dirt falls into the cylinder. In turn the spark plug socket is placed over the plug and unscrewed using a ratchet and extension and taken off in the anticlockwise direction. About half a thread of anti-seize compound should be spread on the threads of the spark plug and a new plug screwed in as tightly as it can be turned by hand and then with the help of a torque wrench or a ratchet. A short length of rubber hose can be used in helping in threading of the plug to avoid damaging the threads of the hole. This has to be done for the remaining spark plugs then screw back the ignition coil and join the wiring for the V6 vehicles while inspecting the boot and the wire for any signs of damage before joining the plug wire to the new spark plug of the V8 vehicles by twisting it until it comes into contact.