Engine Block Sealant Seals Over Time

Best Head Gasket Sealer For Headgasket LeaksIf a engine block develops a crack, JB Weld can be used to seal up the crack and prevent the crack from sucking in air or leaking coolant. JB Weld is a type of epoxy …

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Oct 05, 2011  · My guess is they didn’t fix the real problem which is a cracked block. Most of the time overheating a motor will blow the head gasket and not crack the block.

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