Loosing coolant in 2002 grand prix 3.8liter engine

35

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

115

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

2 out of 2 people think this is helpful.
35

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

1 out of 1 people think this is helpful.
64,995

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

35

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 out of 1 people think this is helpful.
64,995

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

35

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

1 out of 1 people think this is helpful.

Your Answer

Add photo

Related Questions

Grand Prix

Looking for a Used Grand Prix in your area?

CarGurus has 2,860 nationwide Grand Prix listings starting at $1,995.

ZIP:

Search Pontiac Grand Prix Questions

Pontiac Grand Prix Experts

#1 Js08016
Js08016
Reputation 4,120
#2 Tom Demyan
Tom Demyan
Reputation 2,770
#3 munron
munron
Reputation 2,150
View All

Related Models For Sale

Used Chevrolet Impala
514 Great Deals out of 29,110 listings starting at $1,100
Used Pontiac Bonneville
536 listings starting at $3,699
Used Chevrolet Monte Carlo
14 Great Deals out of 1,396 listings starting at $1,995
Used Pontiac Grand Am
1,238 listings starting at $1,595
Used Chevrolet Malibu
827 Great Deals out of 81,055 listings starting at $995
Used Chevrolet Camaro
154 Great Deals out of 32,676 listings starting at $1,995
Used Ford Mustang
363 Great Deals out of 46,832 listings starting at $1,999
Used Pontiac Firebird
8 Great Deals out of 741 listings starting at $1,800
Used Honda Accord
719 Great Deals out of 87,017 listings starting at $1,250

Used Cars For Sale

2008 Pontiac Grand Prix For Sale
12 Great Deals out of 427 listings starting at $1,995
2007 Pontiac Grand Prix For Sale
402 listings starting at $2,999
2006 Pontiac Grand Prix For Sale
4 Great Deals out of 453 listings starting at $1,999
2005 Pontiac Grand Prix For Sale
375 listings starting at $3,000