Why does the heater hose on my 2007 Pontiac Grand Prix 3.8 liter keep busting?

Asked by Jan 29, 2015 at 12:25 AM about the 2007 Pontiac Grand Prix Base

Question type: Maintenance & Repair

heater hose is busting and making my car over heat

3 Answers

675

I have never heard of such a thing. Maybe the radiator is clogged?

675

Or the heater core?

55,245

Excessive pressure bursting hoses or forcing the coolant out through the cap can be caused by a blown cylinder head gasket or cracked cylinder head. In this situation the cooling system is pressurized by being exposed to a cylinder, this means that every time the engine fires it pushes gases into the cooling system. A clue to this is if the car blows bubbles in the radiator expansion tank, you'd be able to see these if you run it with the cap off and look in. Obviously you need to be careful when removing the radiator cap if the engine is hot. It's not unknown for this fault to rupture the radiator or the heater matrix as well as the pipes. (not all together of course, it'll usually burst the weakest component). I'm not saying that this is definitely what's wrong with your car but given the symptoms you should check it out. As well as visible bubbles in the expansion tank, if you used a cylinder compression tester then one cylinder would read low if you have this fault.

3 of 3 people found this helpful.

Your Answer

Grand Prix

Looking for a Used Grand Prix in your area?

CarGurus has 2,679 nationwide Grand Prix listings starting at $1,750.

ZIP:

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
590 Great Deals out of 34,464 listings starting at $900
Used Pontiac G8
9 Great Deals out of 444 listings starting at $5,400
Used Dodge Charger
468 Great Deals out of 33,545 listings starting at $1,999
Used Chevrolet Monte Carlo
10 Great Deals out of 1,252 listings starting at $999
Used Ford Mustang
596 Great Deals out of 39,148 listings starting at $1,895
Used Pontiac G6
42 Great Deals out of 3,872 listings starting at $1,200
Used Pontiac GTO
6 Great Deals out of 446 listings starting at $4,995
Used Pontiac Grand Am
1,071 listings starting at $1,500
Used Chevrolet Malibu
1,123 Great Deals out of 62,111 listings starting at $880
Used Dodge Challenger
255 Great Deals out of 25,099 listings starting at $7,750
Used Chrysler 300
344 Great Deals out of 19,423 listings starting at $900
Used Jeep Grand Cherokee
1,058 Great Deals out of 72,266 listings starting at $1,195

Used Cars For Sale

2008 Pontiac Grand Prix Base For Sale
9 Great Deals out of 402 listings starting at $1,750

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.