![]() When replacing spark plugs be sure to use a spark plug socket. Be very careful to not mix up the firing order when removing spark plugs and spark plug wires. If you get the wrong plug wire back on the spark plug you will have a misfiring engine. It will also help seal out moisture that can cause corrosion and high resistance at the plug to wire connection.Īll gasoline engines have a very specific firing order. This will make it much easier to remove the plug wire in the future. Also when installing any spark plug wire it is a good practice to place di-electric silicon grease between the spark plug and the spark plug boot. Spark plug wires wear out over time and there is no way to reliably repair them. If the plug wire becomes damaged, you should replace the entire plug wire and I recommend replacing all spark plug wires. Twisting the boot may help break it loose from the ceramic spark plug shell. There are special pliers and tools designed to help remove spark plug wires. ![]() Grab onto the spark plug boot or get under the boot to pop it off. Use care when removing the spark plug wires. If you notice extra oil collecting around the spark plug recommend new valve cover gaskets and oil seals as this will deteriorate spark plug wires and will lead to an engine misfire. Of course you will always wear safety glasses! Some spark plugs point straight down into the engine and this is an excellent catch basin for dirty and abrasive junk that can damage the inside of the combustion chamber. Be sure to remove disposable (nitrile) gloves before working around a hot engine as they can easily melt and make a burn much worse.īefore removing any spark plugs take compressed air and blow out all the dust and junk that may collect around the outside of the spark plug. It is also a good practice to change clothing if gas or oil is spilled on them. A good work practice is to wear nitrile gloves, or mechanics gloves and also to wash hands often if they become oily or greasy. Some technicians will become hyper sensitive to motor oil and develop skin rashes when working around motor oil and grease. I personally recommend this practice as used motor oil is a known carcinogen. Many technicians wear disposable nitrile gloves when working on vehicles. Without proper hand and arm protection you can quickly get a very bad burn just by accidentally touching the exhaust manifold. Exhaust manifolds on a running engine are about 300 degrees and can easily get up to 500 degrees under a load. Some gloves have extra-long cuffs designed to protect your fore arms from burning on a manifold. Most commonly this is leather however Kevlar gloves may provide superior protection. If you are working near a hot exhaust manifold I recommend wearing a quality pair of mechanics gloves made of a heat resistant material. ![]() Removing sparkplugs may require you to work close to the exhaust manifold that can quickly and severely burn your hands or arms. Removing spark plugs is best done on a cold engine however when performing a compression test, or a cylinder leakage test the engine must be at operating temperature. STUDY THE ARTICLE BELOW to help you compete this first Assignment Link to Printer version of Spark Plug R & R
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