1999 Chevy Tahoe coolant leak

Tiny
CRAZY4TRAINS
  • MEMBER
  • 1999 CHEVROLET TAHOE
  • V8
  • 4WD
  • AUTOMATIC
  • 128,000 MILES
My 99 Tahoe has had a small coolant leak for years. After the vehicle sits overnight there may be a small (3-4 inch diamater) puddle of coolant on the floor. Lately I have noticed the amount has increased. I replaced the water pump myself 3 years ago and this didn't solve the problem. It is very difficult to find the source of this leak as the coolant is blown all over the front of the engine by the fan. Is there an easy way for me to determine the source of this leak or do I need to take it in for a pressure test. I like to have a good idea of what the problem is so I can decide to either fix myself or have somebody fix. I also like to have an idea of the problem before I ask somebody to fix so I know their diagnosis is not off base.
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Monday, November 9th, 2009 AT 11:45 AM

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Tiny
JACOBANDNICKOLAS
  • EXPERT
Have you checked the radiator itself to see if there is a leak coming from there? ALso, you could pressure test it yourself. The gauge screws on to the radiator inplace of the cap. Many parts stores will lend or rent the tool to you. Also, there is a dye you can get to place in the coolant to help you trace where the leak is coming from. The dye shows up under a black light.
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Tuesday, November 10th, 2009 AT 6:24 PM

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