Loosing coolant in 2002 grand prix 3.8liter engine


Asked by Nov 03, 2015 at 05:53 PM about the 2002 Pontiac Grand Prix GT Coupe

Question type: Maintenance & Repair

I start my car and when I look under car I have a pool of coolant under passengers side of engine. Already replaced water pump and belt tensioner. Coolant loss is near radiator of car.

6 Answers


Have you checked the radiator hoses, or the little intake hose . That's what it sounds like.

2 of 2 people found this helpful.

haven't checked that little intake hose radiator hose is good.

1 of 1 people found this helpful.

When you did the belt tensioner did you replace the plastic elbows? Metal ones are now available. They hold up better than the plastic. Or if you're talking about the passenger's side front area of the car it may be the lower radiator hose. It's right there at the bottom of the radiator under the filler cap side. Have the upper and lower intake manifold gaskets been replaced? If you're not sure, how many miles are on the car? They will fail between 90,000 and 120,000 miles. HTH. -Jim


My car has less than 90,000 miles on it and replaced the elbows when changed belt tensioner came with plastic ones like was on it before. Never has had the manifold gaskets replaced.

1 of 1 people found this helpful.

Remove the plastic top cover and look for signs of leaking around the intake manifold. It may be leaking externally and running down. On my Nephew's '00 Grand Prix GT it showed up as little pools of coolant near the back of the manifold. If this is what's going on have both the upper and lower intake gaskets done. Even if the lower isn't leaking yet. It will! Also, replace the plastic upper intake (upper plenum) don't reuse the old one. They crack! Pull the oil dipstick and look under the oil filler cap for white milky "goop". If it's there the intake gaskets are shot. Immediately after the repair have the oil changed twice to clean out the lubrication system in the engine. Otherwise you can wind up with a spun bearing! BTW my Nephew's gaskets failed at 95,000 miles. HTH. -Jim


All my leaking coolant is up by radiator no where near engine block at all

1 of 1 people found this helpful.

Your Answer

Add photo

Related Questions

Grand Prix

Looking for a Used Grand Prix in your area?

CarGurus has 2,871 nationwide Grand Prix listings starting at $900.


Search Pontiac Grand Prix Questions

Pontiac Grand Prix Experts

#1 Js08016
Reputation 4,170
#2 Tom Demyan
Tom Demyan
Reputation 2,840
#3 munron
Reputation 2,180
View All

Related Models For Sale

Used Chevrolet Impala
521 Great Deals out of 31,726 listings starting at $1,450
Used Pontiac Bonneville
3 Great Deals out of 533 listings starting at $1,799
Used Pontiac Grand Am
1,215 listings starting at $1,999
Used Chevrolet Monte Carlo
21 Great Deals out of 1,408 listings starting at $1,995
Used Ford Mustang
474 Great Deals out of 45,735 listings starting at $1,999
Used Chevrolet Malibu
948 Great Deals out of 79,665 listings starting at $1,500
Used Chevrolet Camaro
226 Great Deals out of 30,943 listings starting at $1,217
Used Ford Taurus
250 Great Deals out of 20,434 listings starting at $699
Used Honda Accord
813 Great Deals out of 84,286 listings starting at $1,050

Used Cars For Sale

2008 Pontiac Grand Prix For Sale
18 Great Deals out of 429 listings starting at $1,500
2007 Pontiac Grand Prix For Sale
4 Great Deals out of 392 listings starting at $2,500
2006 Pontiac Grand Prix For Sale
456 listings starting at $2,675
2005 Pontiac Grand Prix For Sale
5 Great Deals out of 351 listings starting at $1,895

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.