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Where is the freeze plug located - 1992 Cadillac DeVille

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Freeze plugs are usually located on the sides of the engine block. There are more than one on an engine. There purpose is to "give way" and push out and allow a place for water to expand when it freezes in the event that you don't have enough anti-freeze/coolant in your radiator when the temperatures get below freezing.

Posted on Feb 03, 2009

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Rear driver side heard freeze plug replacement.


It is impossible to propose a diagnosis without knowing the YEAR, MAKE and MODEL of your vehicle.
That being said, replacement of freeze plugs on any vehicle is not a minor undertaking. The mere failure of a freeze plug suggests poor maintenance of the vehicle over time, and is often a precursor of additional underlying cooling system damage.
To replace freeze plugs, often the engine must be removed, or at least decoupled from the car and elevated, to access the freeze plug location. Once you have access to the freeze plug location, you need to pry out the existing freeze plug, removing all rust deposits from the visible cavity and filing the freeze plug seating surface smooth, then use a mallet and large wooden peg to install the new freeze plug.
Once you are done, it is highly advisable to replace the thermostat in the vehicle, check the condition of the radiator, and be certain to maintain a 50/50 ratio of antifreeze to water, using only filtered water.

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How to chage afreeze plug ?


You must extract the freeze plug from the engine block, either using an extractor or a chisel, then clean the freeze plug seat of all debris and corrosion, then carefully install the new freeze plug using a wood block and mallet. Depending upon the location of the freeze plug, either adjacent components (exhaust pipes, starter, accessory brackets, etc.) must be removed for access. If the freeze plug is in a particularly difficult location, the engine may need to be removed from the car to service the freeze plug (in extreme circumstances).

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