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Signs of a blown head gasket are:

  • Loss of coolant with no apparent leak.
  • Engine overheating.
  • Overfull oil level.
  • A white foamy substance on the underside of the oil fill cap.
  • White smoke from the exhaust especially at startup.
  • Air bubbles escaping from the radiator, cap off, engine cold.
  • Possible engine miss.
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Q: How do you know if your head gasket is blown on a 1998 Chevy lumina?
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