Radiator Goop

Asked by Mar 08, 2016 at 06:43 PM about the 2004 Pontiac Grand Prix GT1

Question type: Maintenance & Repair

I bought a USED 2004 Pontiac Grand Prix GT 3.8L, V-6 w 217,000 miles.

Last Summer it overheated for the firs time. After running a garden hose
down the radiator it cooled.

I has also seemed to overwarm at Drive Thrus. But upon resuming trip, the
gauge would resume the usual running temp.

I have had a rusty colored sediment/deposits, and upon changing the Head
Gaskets and Intake Gaskets, had a few plugged water ports. The Radiator
CAP was severely clogged.

Upon re-starting the engine, bleeding the,air out and checking the
Temperature was too hot, removed the thermostat.

Even still, the coolant, has OVERHEATED and now that it is cooled back
down, the UPPER Hose has collapsed.

Can the RADIATOR CAP cause all this?

1 Answer

5,365

Check your cooling fan to make sure it is functioning. It is probably an electric and could be failing to energize when your engine temp rises. A fan failure would cause the temp fluctuation you see between the rise in the "drive through" line and going back to normal at speed.

Your Answer

Pontiac Grand Prix Experts

  • #1
    Js08016
    Reputation
    4,470
  • #2
    Tom Demyan
    Reputation
    3,110
  • #3
    munron
    Reputation
    2,510
View All

Related Models For Sale

Used Chevrolet Impala
579 Great Deals out of 34,521 listings starting at $900
Used Pontiac Bonneville
485 listings starting at $2,995
Used Chevrolet Monte Carlo
10 Great Deals out of 1,251 listings starting at $999
Used Ford Mustang
590 Great Deals out of 39,483 listings starting at $1,895
Used Pontiac G6
45 Great Deals out of 3,883 listings starting at $1,200
Used Pontiac GTO
5 Great Deals out of 448 listings starting at $4,995
Used Pontiac Grand Am
1,086 listings starting at $1,500
Used Chevrolet Malibu
1,060 Great Deals out of 62,271 listings starting at $880
Used Chrysler 300
321 Great Deals out of 19,472 listings starting at $900
Used Jeep Grand Cherokee
1,057 Great Deals out of 72,192 listings starting at $1,195

Used Cars For Sale

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.