2001 BLAZER 4

  • Tiny
  • Trick63
  • 2001 Chevrolet Blazer
  • 119,000 miles

2001 Blazer 4.3 L Vortec, I've blown 2 different radiators. I have flushed the system and the radiator cap is new as well. There is no water in my oil, but I was told it could be a cracked head or blown head gasket. I really need help with this guys, Thanks!

Sunday, March 10th, 2013 AT 7:29 PM

5 Answers

  • Tiny
  • Jacobandnickolas
  • Expert
  • 68,287 posts

Try this. With the engine cold, remove the radiator cap and start the engine. Does coolant shoot out of the radiator?

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Sunday, March 10th, 2013 AT 7:37 PM
  • Tiny
  • Trick63
  • Member

No Sir, No shouting fluid!

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Sunday, March 10th, 2013 AT 9:31 PM
  • Tiny
  • Jacobandnickolas
  • Expert
  • 68,287 posts

I was thinking you had a bad head gasket that was pumping pressure into the cooling system. How many pounds of pressure is the release on the radiator cap?

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Monday, March 11th, 2013 AT 12:50 AM
  • Tiny
  • Trick63
  • Member

The cap seems to solid, no visible pressure release. I'm unsure as how to verify that it even has a pressure release. Is this something that this vehicle should have? I bought the cap from an auto supply store.

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Monday, March 11th, 2013 AT 6:03 PM
  • Tiny
  • Jacobandnickolas
  • Expert
  • 68,287 posts

They make testers for the caps that see if they release after a certain amount of pressure is reached.

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Tuesday, March 12th, 2013 AT 12:27 AM

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