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Remove and clean the petcock. Replace and if it still leaks, replace with a new petcock.
First answer by Clay. Last edit by Clay. Contributor trust: 3458 [recommend contributor]. Question popularity: 53 [recommend question]
Answers.com > Wiki Answers > Categories > Cars and Vehicles > Parts and Repairs > Heating AC and Engine Cooling > Radiators > How do you fix an antifreeze leak through your petcock?
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Can an lt1 radiator petcock leak?
