Chevrolet 19417055 Plug

The spark plugs can be accessed only when the air intake resonator and the ignition coils are pulled off; they are screwed into the top of the cylinder head. Equipment usually required for replacement comprises a spark plug socket that screws into the handle of a ratchet, several extensions, a gap gauge to measure the distances between electrodes in the new spark plugs, and a torque wrench, although the last is not indispensable. Bear in mind that spark plugs on these models are 1/8-inch longer than standard plugs; therefore, the spark plug socket should not hit on the longer plugs to avoid cracking the insulators. The proper procedure is to buy new plugs before when they are needed and set them to the correct gap, besides putting them one by one and making sure that the right plug is for the engine. Ensure the engine has cooled down before taking out any plugs and wait for the new plugs you intend to use and ensure that none of them has defects and ensure you check on the gap as well. The gap is verified using a proper-thickness gauge intercalated between the electrodes at the end of a plug, and the thickness gauge comes in a tapered form due to the recommendation by the manufacturers to prevent scratching of the platinum layers on the electrodes. Now that the engine should be cool, go on and remove the ignition coils; gently twist and pull the spark plug boots upward. If it is possible, first expel air in the spark plug hole with the compressed air to avoid introduction of contamination when withdrawing the spark plug. Insert the ceramic of the spark plug socket over the plug and rotate it anti-clockwise to unscrew it, sometimes there is need to use extension bar in order to access some of the plugs. Check the deposited condition on the old spark plug to note the running condition and before fitting new spark plugs apply anti seize on the spark plug threads but not on the lower threads. Insert a new plug to the point where it cannot be turned manually and then snug it up with a torque wrench or a ratchet head, with rubber hose slipped on the end of the plug to help you cover the plug hole just in case you'll get to thread the plug crosswise. Lastly fit the plug boot on to the coil and to the spark plug in the same way, until all the spark plugs are fitted.