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
18,645

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
20

John answered 4 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

Your Answer:

Related Questions

  • Coolant leak 4 Answers

    I got a coolant leak toward passenger front lower part of 3.8l v6 is this gasket?

    2006 Pontiac Grand Prix Base

    -

    Maintenance & Repair

  • Coolant leak 4 Answers

    I have a coolant leak that I can't find the where abouts, I've replaced the elbows, and reservoir/reservoir line.

    2001 Pontiac Grand Prix GTP

    -

    Maintenance & Repair

  • coolant leak 4 Answers

    I have a small amount of coolant on the ground between the back of the engine and the firewall. Pressure tested, no loss of pressure with the tester on all day. Not intake manifold, just replaced th...

    2003 Pontiac Grand Prix GT

    -

    Maintenance & Repair

  • Coolant leak 2 Answers

    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...

    2004 Pontiac Grand Prix GTP

    -

    Maintenance & Repair

  • Coolant leak 4 Answers

    Car is leaking coolant underneath the water pump is not the elbows I don’t believe is the pump but it’s leaking more when car is sitting for a period of time the bottom front passenger-side is soak...

    2006 Pontiac Grand Prix Base

    -

    Maintenance & Repair

Grand Prix

Looking for a Used Grand Prix in your area?

CarGurus has 6 nationwide Grand Prix listings and the tools to find you a great deal.

Postal Code:

Shortcuts

Search Pontiac Grand Prix Questions

CarGurus Experts

  • #1
    munron
    Reputation
    8,220
  • #2
    James Sparrow
    Reputation
    7,520
  • #3
    Dorian Hendricks
    Reputation
    6,160
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Pontiac GTO
5 listings
Used Chevrolet Impala
12 Great Deals out of 112 listings starting at $3,531
Used Pontiac G6
20 listings
Used Pontiac Grand Am
3 listings
Used Chevrolet Monte Carlo
8 listings starting at $3,000
Used Chevrolet Corvette
22 Great Deals out of 1,004 listings starting at $19,500
Used Ford Mustang
55 Great Deals out of 1,259 listings starting at $4,995
Used Chevrolet Silverado 1500
212 Great Deals out of 5,937 listings starting at $3,995
Used Dodge Magnum
3 listings starting at $4,700
Used GMC Sierra 1500
131 Great Deals out of 6,882 listings starting at $3,975

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.