car keeps overheating.. cant figure out what it is.. radiator hose blew and i replaced it but i had put the wrong coolant in but i flushed it and it was just a tint of green left in there so was just tired of doing it lol. but i filled it back up with the dex cool. and it is overheating now. hoses are very firm as if it were presuureized but seems like it is blocked somewhere. if i open the cap and realease the pressure the car will cool down to about normal but once i close it up and start driving again the car over heats again.

Asked by Dec 04, 2015 at 06:08 PM about the 1999 Pontiac Grand Am 2 Dr GT Coupe

Question type: Maintenance & Repair

5 Answers

24,365

Replace the thermostat and see if it improves. While your at it replace the rad cap too, those should be replaced every two years.

1 of 1 people found this helpful.
92,835

Sounds more like a bad thermostat but it could be an air pocket, this engines can be a real bear to get the air out.

i dont have a radiator cap mine goes straight through the overflow tank which is new. and the thermostat is not currently in becuase it was a previous problem. havent put it back in yet.

1,555

If you have no thermostat and you have excessive pressure you are looking at head gaskets, buy a block tester, it looks like a big turkey type baster, you put in the fluid that comes with the tester, place it in the overflow opening (because you don't have a rad cap) if the fluid changes colour you have exhaust getting in your cooling system, this is a faulty head gasket. The wrong antifreeze will not cause over heating

1 of 1 people found this helpful.

hmmm hope this isnt it ive already replaced the head gasket before. but i do have white smoke so this could be it =\ if so im most likely going to junk the car.

Your Answer

Add photo

Related Questions

Grand Am

Looking for a Used Grand Am in your area?

CarGurus has 1,215 nationwide Grand Am listings starting at $1,999.

ZIP:

Search Pontiac Grand Am Questions

Pontiac Grand Am Experts

#1 tenspeed
tenspeed
Reputation 7,610
#2 John Saffrahn
John Saffrahn
Reputation 1,600
#3 Tom Demyan
Tom Demyan
Reputation 1,410
View All

Related Models For Sale

Used Pontiac Grand Prix
30 Great Deals out of 2,871 listings starting at $900
Used Pontiac Firebird
12 Great Deals out of 724 listings starting at $3,990
Used Chevrolet Impala
521 Great Deals out of 31,726 listings starting at $1,450
Used Chevrolet Camaro
226 Great Deals out of 30,943 listings starting at $1,217
Used Ford Mustang
472 Great Deals out of 45,735 listings starting at $1,999
Used Chevrolet Malibu
948 Great Deals out of 79,664 listings starting at $1,500
Used Honda Accord
813 Great Deals out of 84,287 listings starting at $1,050
Used Toyota Camry
999 Great Deals out of 90,916 listings starting at $650
Used Nissan Altima
1,027 Great Deals out of 81,562 listings starting at $1,200
Used Honda Civic
657 Great Deals out of 88,603 listings starting at $995

Used Cars For Sale

2005 Pontiac Grand Am For Sale
140 listings starting at $2,500
2004 Pontiac Grand Am For Sale
309 listings starting at $1,999

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.