Need advice

Asked by Jan 28, 2017 at 02:45 PM about the 2003 Pontiac Grand Prix

Question type: Maintenance & Repair

Ok so i need someones opinion i have 2003 pontiac
grand prix se it has a the 3.1 engine in it. When i
purchased the car i had no problems at all. The car
itself has over 300xxx miles on it but its on a
second engine. Me and a couple buddies were out
riding around one night when the temp light came
on (keep in mind the temp gauge does not work)
and the car started steaming. I stopped and checked
it the top radiator hose had swelled and exsploded. I
got a new hose and installed it refilled the radiator
bled it out car continued to get hot and started
swelling the new hose. So being around cars that
told me bad thermostat. I got a new one changed it
and bled and bled repetedly using 4 gallons of
antifreeze. The heat and everything was working
great for a few days and then out of the blue the
heat quit and temp light came back on. So i bled the
system once again. I have bled many of times to be
specific. I put a pressure test on it yesterday gauge
never dropped till i opened the thermostat housing
bleeder. I refilled the reserve and radiator drove
around town all day no problems at all. Started for
my weekly cape missouri drive got on the interstate
temp light comes on heat quits and you can see
steaming coming out from behind the car at 70
mph. Less than a quarter mile light goes off but still
no heat. At the next point i could stop i opened the
bleeders and a bunch more air comes out. Anyone
have any idea how im still getting air in the system
and there is no visible leaks anywhere?

2 Answers

101,875

Blown head gasket or cracked cylinder head, your getting combustion gasses in the cooling system, eventually you will start to notice either coolant in the oil or oil in the coolant, you may also notice a slight engine miss on intial start up that will go away within a short period of time. A simple block check test can confirm this.

70,815

Yes, blown head gasket. The 3.1 is notorious for that. HTH. -Jim

Your Answer

Grand Prix

Looking for a Used Grand Prix in your area?

CarGurus has 2,699 nationwide Grand Prix listings starting at $1,500.

ZIP:

Pontiac Grand Prix Experts

  • #1
    Js08016
    Reputation
    4,400
  • #2
    Tom Demyan
    Reputation
    3,040
  • #3
    munron
    Reputation
    2,460
View All

Related Models For Sale

Used Chevrolet Impala
551 Great Deals out of 35,022 listings starting at $900
Used Pontiac Bonneville
545 listings starting at $2,995
Used Chevrolet Monte Carlo
5 Great Deals out of 1,266 listings starting at $1,488
Used Ford Mustang
618 Great Deals out of 36,130 listings starting at $1,800
Used Pontiac Grand Am
1,261 listings starting at $994
Used Chevrolet Camaro
428 Great Deals out of 30,565 listings starting at $2,495
Used Pontiac GTO
13 Great Deals out of 488 listings starting at $5,995
Used Chevrolet Malibu
968 Great Deals out of 66,469 listings starting at $1,000
Used Pontiac Firebird
12 Great Deals out of 884 listings starting at $2,500
Used Nissan Maxima
283 Great Deals out of 22,801 listings starting at $1,499

Used Cars For Sale

2008 Pontiac Grand Prix For Sale
6 Great Deals out of 393 listings starting at $1,995
2007 Pontiac Grand Prix For Sale
14 Great Deals out of 393 listings starting at $1,650
2006 Pontiac Grand Prix For Sale
426 listings starting at $3,995
2005 Pontiac Grand Prix For Sale
3 Great Deals out of 344 listings starting at $1,500

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.