car has no heat ran way too hot

Asked by Nov 19, 2016 at 08:27 AM about the 2008 Pontiac Grand Prix Base

Question type: Maintenance & Repair

08 grand prix...today noticed puddle
under car..have changed thermostat 3
times....I topped off anti freeze this am
(19) Nov and Drove... no heat and temp
slowly rise all the way up to red got off
highway and now sitting....car was
running fine!

2 Answers

10,975

If there was a puddle of coolant under the car, there is definitely a failure somewhere on the cooling system. Inspect the water pump. The seals or bearings can go without any warning and fail. This will typically lead to coolant blowing out of the water pump. The obvious thing to check is the radiator. Look for corrosion and leaks and inspect upper and lower radiator hose as well as the hoses that run to the heater core.

1 out of 1 people think this is helpful.
3,825

Agree. Something is leaking and you need to find and fix that before you drive it any more. Could also be the plastic elbows in the lines to the heater. They often fail. Even if they haven't have them replaced while you're fixing things. There's also quite likely air trapped in the cooling system. That happens all the time and needs to be bled out before it will cool/heat properly. If you're not up to it yourself, you need a shop to go through the system and get it fixed up. Probably nothing huge, but it does need to be maintained.

Your Answer

Add photo

Related Questions

Search Pontiac Grand Prix Questions

Pontiac Grand Prix Experts

#1 Js08016
Js08016
Reputation 4,120
#2 Tom Demyan
Tom Demyan
Reputation 2,770
#3 munron
munron
Reputation 2,150
View All

Related Models For Sale

Used Chevrolet Impala
533 Great Deals out of 29,802 listings starting at $799
Used Dodge Charger
282 Great Deals out of 27,244 listings starting at $2,250
Used Pontiac G8
20 Great Deals out of 349 listings starting at $4,995
Used Chevrolet Monte Carlo
18 Great Deals out of 1,399 listings starting at $1,995
Used Pontiac G6
57 Great Deals out of 4,178 listings starting at $699
Used Ford Mustang
390 Great Deals out of 47,148 listings starting at $1,999
Used Chevrolet Malibu
850 Great Deals out of 81,341 listings starting at $995
Used Chrysler 300
347 Great Deals out of 20,478 listings starting at $1,000
Used Honda Accord
781 Great Deals out of 87,947 listings starting at $1,150
Used Dodge Challenger
110 Great Deals out of 24,203 listings starting at $8,256

Used Cars For Sale

2008 Pontiac Grand Prix Base For Sale
12 Great Deals out of 382 listings starting at $1,995