1999 Chevy Blazer Strange Coolant leak

Tiny
THERED
  • MEMBER
  • 1999 CHEVROLET BLAZER
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 150,000 MILES
My '99 blazer began to run a little warmer than normal two days ago. I was mindful not to let it overheat, but it ran about 30-40 degrees warmer than usual. For two days I flushed the coolantsystem(with water once each day). After a short drive, the blazer belched steam and leak a large majority of its water. Upon first inspection it appeared to be leaking from the bottom of the radiator, on the driver's side. Is there a plug of some sort, on the nearly unaccessible, on the underside of the radiator? I had decided to flush the dex-cool completely and start fresh with an all make mix, other than the dex-cool. Besides a pressure test(and moving the vehicle), is there a way to locate this large leak? Also, the resevoir remains full throughout the leaking and adding more water, might I have a clog? Or does the system notwork like that?
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Thursday, August 21st, 2008 AT 10:28 AM

1 Reply

Tiny
JETSA
  • MEMBER
2 things come to mind. 1st, the Blazer has a bad tendancy to clog up passages with the long life (orange) coolant. We especially see this with the heater core due to the smaller lines in the heater core. So it is possible that there is a clog somewhere, but the leak is what needs to be addressed 1st in my opinion. A pressure test is the only way I know of to safely and accurately find a coolant leak.
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Friday, August 22nd, 2008 AT 9:17 PM

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