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To change the rear spark plugs, you have to change them from underneath the car at the rear of the engine, place car on stands or ramps, allow car to cool at least 45 minutes, do one at a time, if the boots are hard to pull off you will need a boot puller or you will pull the end off, you need a 5/8 socket with the end that takes a box wrench, use ac delco plugs, they are expensive but other name brands will give you trouble down the road.

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โˆ™ 2011-10-20 17:50:30
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Q: How do you change the rear spark plugs on a 1990 sedan deville with a 4.5L?
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