Pontiac Grand Prix losing coolant in reservoir

Asked by Sep 13, 2013 at 12:10 AM

Question type: Maintenance & Repair

My 2006 Grand Prix makes gurgling noises when the
reservoir is empty.  Filled the reservoir, the noises stopped.
It is not overheating. Had the cooling system flushed & new
dex-cool added. Assumed air was in the system. 4 days
later, it makes the gurgling sound again. Checked the
reservoir & it was empty. Filled it & again, the noises
stopped. It's been bled...  am obviously loosing fluid but
cannot visually see any leaks from under the hood or from
underneath... nothing wet on the pavement. Can detect a
very faint antifreeze aroma when I get out of car but it's
only for a few moments then it's gone. The radiator is
always full but the top hose is very pliable when engine is
hot & running as if there's not much pressure. Any
suggestions?

1 Answer

112,035

Inspect water pump weep hole. If you see any signs of dried coolant around the weep hole replace water pump. With engine cool do pressure test. This will cause it to force coolant out the leak and on a cool engine it will not evaporate so its easier to find the leak. Also how old is you radiator cap. It must be in good shape and proper psi for cooling system to operate correctly.

Your Answer

Add photo

Related Questions

  • Pontiac Grand Prix losing coolant in reservoir 1 answer

    My 2006 Grand Prix makes gurgling noises when the reservoir is empty. Filled the reservoir, the noises stopped. It is not overheating. Had the cooling system flushed & new dex-cool added. Assumed ...

    GMC

    -

    Maintenance & Repair

  • Transmission losing reverse in 2wd, but works alright in 4wd 2 answers

    Have an 89 GMC 4wd pick-up with a 700r trans, that is losing reverse, in 2wd, but seems to work alright in 4wd. Shifts alright, in forward gears. Fluid looks good, and is full. What could be the pro...

    GMC Sierra 1500

    -

    Maintenance & Repair

  • What type of coolant should i put in my 98 sonoma 8 answers

    I accidentally put green antifreeze in my radiator After i changed my t-stat. And i need to know if that can mess my engine up and what kind of coolant i should use from now on?

    1998 GMC Sonoma 2 Dr SLS Sport Extended Cab SB

    -

    Maintenance & Repair

  • When empty do I fill the coolant resivoir with coolant? 2 answers

    Had an oil/lube done yesterday and told it was empty (not radiator, just reservoir) - Kwik Kar Lube did not have coolant to put in so will do it myself but need to be sure I am doing the correct thing...

    1999 GMC Sierra 1500 SLE Extended Cab LB

    -

    Maintenance & Repair

  • Losing engine power with no warning 4 answers

    I recently took my Yukon (140,000miles) up to a local mountain(4000ft elevation) , it drove up the curvy steep road fine. Engine ran a little warm, a smidgen above center, but no problem till we app...

    2007 GMC Yukon XL Denali 4WD

    -

    Maintenance & Repair

Search GMC Questions

GMC Experts

#1 dragonflyoffshore
dragonflyoffshore
Reputation 5,230
#2 John Saffrahn
John Saffrahn
Reputation 4,490
#3 Richard Schroer
Richard Schroer
Reputation 4,430
View All

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.