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Q: headgasket on 1994 Buick Skylark

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could overfilling the antifreeze/coolant after a recent radiator replacement cause head gasket to leak? does steel seal work on my gasket?
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Over filling would not hurt your head gasket. Most likely, when the radiator wore out, it allowed the engine to over badly over heat. When I check out an engine that has run out of coolant, I do a Block Check to make sure that the head gasket is still intact.
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