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

565

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

565

Or the heater core?

39,855

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 out of 3 people think this is helpful.

Your Answer

Add photo

Related Questions

Grand Prix

Looking for a Used Grand Prix in your area?

CarGurus has 3,749 nationwide Grand Prix listings starting at $879.

ZIP:

Search Pontiac Grand Prix Questions

Pontiac Grand Prix Experts

#1 Js08016
Js08016
Reputation 3,980
#2 Tom Demyan
Tom Demyan
Reputation 2,660
#3 munron
munron
Reputation 2,070
View All

Related Models For Sale

Used Chevrolet Impala
799 Great Deals out of 34,708 listings starting at $799
Used Pontiac G8
20 Great Deals out of 427 listings starting at $4,750
Used Dodge Charger
395 Great Deals out of 30,065 listings starting at $2,343
Used Chevrolet Monte Carlo
12 Great Deals out of 1,692 listings starting at $2,300
Used Pontiac G6
87 Great Deals out of 5,158 listings starting at $999
Used Pontiac Grand Am
1,665 listings starting at $1,995
Used Chevrolet Malibu
1,077 Great Deals out of 85,119 listings starting at $1,995
Used Pontiac GTO
11 Great Deals out of 488 listings starting at $6,500
Used Ford Mustang
396 Great Deals out of 44,403 listings starting at $1,000
Used Jeep Grand Cherokee
888 Great Deals out of 69,215 listings starting at $1,300
Used Nissan Maxima
359 Great Deals out of 25,313 listings starting at $1,400
Used Honda Accord
887 Great Deals out of 82,090 listings starting at $999
Used Chrysler 300
401 Great Deals out of 22,462 listings starting at $1,000

Used Cars For Sale

2008 Pontiac Grand Prix Base For Sale
11 Great Deals out of 410 listings starting at $1,200