Coolant leak

Asked by Guru8HPWX Jan 01, 2020 at 09:19 PM about the 2004 Pontiac Grand Prix GTP

Question type: Maintenance & Repair

I think I'm loosing coolant somewhere. I fill it up
and 2 days later it's almost empty.  My car never
over heats, spark plugs are fine, no oils in the
overfill tank, it does put off white smoke, my heat
in the car works no sign of leaks on the passenger
floor, the compartment stay warm, I'm lost at this
point. What should I check next? Should I try bars
leak?

2 Answers
18,235

munron answered 4 years ago

And yes, Bars Leak is an excellent idea. It is designed and engineered to seal exactly the type of leaks you may have if they are not too severe. Contrary to what many will try to have you believe, it does no harm to the cooling system, is compatible with sensors and is recommended by GM as an approved, inexpensive "fix". It's not a repair, but may save you from having to perform an expensive repair. I speak from experience, not urban legend.

Mark helpful

John answered 3 years ago

Same here! Check the plastic fitting around where your thermostat is passenger side towards top of motor. They have hairline cracks that leak fluids out under pressure and it evaporates right away. Can replace with metal parts from Autozone, very cheap. They just push on. There are two of them. I suffered for a few years until i found this out.

Mark helpful

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