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IF YOUR CAR IS DIAGNOSED WITH A BAD FREEZE PLUG HERE IS SOME INFORMATION ON THE SUBJECT.
What is a Freeze Plug?
A freeze plug or expansion plug is located in the side of an engine block that is supposed to protect the block against damage due to freeze. Frozen water inside the engine block can expand and crack the block which will completely ruin the motor. Freeze plugs will supposedly prevent this by popping out. However it does not work all of the time.
The Problem with Freeze Plugs?
Freeze plugs are made out of very thin metal and they rust. Running a 50/50 mix of antifreeze will help prevent this problem. However, most people don’t do this. The freeze plug rusts from the inside out causing a cooling system leak.
Signs of a Bad Freeze Plug:
Most common symptom of a bad freeze plug is that your car will leak coolant. They are fairly easy to get to and some are more difficult. It just depends on the type of car. Coolant or water will either leak down the side of the engine or between the engine and transmission.