Overheating...

10

Asked by Apr 23, 2016 at 04:12 PM about the 2005 Pontiac Montana SV6 Base Minivan

Question type: Maintenance & Repair

I have a 2005 montana sv6.  I have replaced the
thermostat, temp coolant sensor, and flush and
filled the radiator.  I have checked all the fan relays
and they click.  I have checked the fan motor with
jumper wires and it functions as expected.  I only
notice the fans come on after it begins to overheat
to about 3\4 full on the temperature gauge.  I even
replaced the thermostat twice thinking maybe the
new one had an intermitten problem.  As the car
begins to heat up about 1\4 way we have heat
from the vents but as the temp approaches the
middle the heat goes away.  Any ideas would help.  
I think I'm down to bad radiator, head gasket, or
something I haven't checked w the cooling fan.  It
did operate for about 1/2 day without overheating
but now it overheats in about 15 to 20 minutes.

3 Answers

76,375

When changing out the thermostat did you purge the cooling system of air when refilling it? Otherwise it could be any one of what you are thinking. I would start with the radiator, take it out and have a radiator shop check it out, may be plugged up.

1 of 1 people found this helpful.
10

Ya I even put in new bleeder screws.

1 of 1 people found this helpful.
15

In my case, it was the head gaskets. Had over 150,000 miles and it solved the same problem on my 2001 olds minivan.

Your Answer

Montana SV6

Looking for a Used Montana SV6 in your area?

CarGurus has 140 nationwide Montana SV6 listings and the tools to find you a great deal.

ZIP:

Pontiac Montana SV6 Experts

  • #1
    tenspeed
    Reputation
    390
  • #2
    SteGenCountryboy
    Reputation
    280
  • #3
    John77778
    Reputation
    160
View All

Related Models For Sale

Used Pontiac Montana
254 listings starting at $995
Used Chevrolet Uplander
3 Great Deals out of 811 listings starting at $1,300
Used Chevrolet Equinox
1,170 Great Deals out of 70,974 listings starting at $1,000
Used Buick Terraza
192 listings starting at $2,950
Used Ford Escape
1,301 Great Deals out of 104,987 listings starting at $895
Used Chrysler Town & Country
351 Great Deals out of 13,519 listings starting at $1,999
Used Dodge Grand Caravan
438 Great Deals out of 30,643 listings starting at $2,490
Used Ford Focus
867 Great Deals out of 63,040 listings starting at $900
Used Toyota Tacoma
722 Great Deals out of 45,868 listings starting at $2,500
Used Pontiac Torrent
15 Great Deals out of 648 listings starting at $2,295
Used Kia Sorento
498 Great Deals out of 32,415 listings starting at $2,290
Used Pontiac Aztek
149 listings starting at $500
Used Toyota Sienna
491 Great Deals out of 23,297 listings starting at $1,500
Used Pontiac Grand Prix
13 Great Deals out of 2,643 listings starting at $950

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.