Question about 1992 Cadillac DeVille
There are between 6 and 10 plugs. They are on the sides of the engine block, look under the exhaust manifolds. They are round plugs 1-1 1/2 " dia .. that are driven into the engine. Their purpose is to pop out in case the engine coolant freezes to keep the block from cracking.. They also allow the sand from sand casting to be removed from the engine block casting. during manufacture.. Replacing them can be easy if its one you can see and eaisly get at.. Can also be impossible without removing many parts and in some cases removing the engine from the car. Good luck. Go to an auto parts store (NAPA is a good one) And look at or purchase a plug so you know what you are looking for.
Posted on May 14, 2014
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Posted on Jan 02, 2017
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