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Overheating after engine froze due to a weather freeze

Tiny
AIDA RAMOS
  • MEMBER
  • 2005 GMC SIERRA
  • 3.1L
  • V8
  • AUTOMATIC
  • 120,000 MILES
With a freeze my car's engine froze. I got it to thaw heated change water pump still heats up could it be the radiator? Overheating was caused by a weather freeze.
Sunday, December 25th, 2016 AT 3:40 PM

1 Reply

Tiny
STEVE W.
  • MECHANIC
  • 13,443 POSTS
If it thawed out the problem is not likely to be the radiator, when those freeze they break and leak. Rent a pressure tester and see if the cooling system will hold pressure. If it holds pressure the issue could be a failed thermostat that is not opening.
If it fails to hold pressure it is something like a head gasket.
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Sunday, December 25th, 2016 AT 4:46 PM

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