Heater core Problems?

Asked by James Jan 30, 2017 at 10:46 PM about the 2002 Pontiac Grand Prix GT

Question type: Maintenance & Repair

I have a 2002 pantiac grand prix. Currently it has no heat. the car reads the
temp just fine so I don't think its the thermometer. The heater core hoses
are both warm but not hot. I wasn't sure what that meant so I started to
take apart the dash to see if the diverter door was moving. I didn't fully get
to the door but i saw the rod its attaches to spin while operating the
controls. I figured is just has to be flushed. I don't have a working garden
hose right now (its frozen) but I tried to just gravity feed. the water went
nowhere. Even when I tried to blow it in. I heard about using a air
compressor but that seems foolish.

First: It does sounds like its just has a bad clog, right?
Second: Do you need the pressure from a garden hose?
Third: Is an air compressor stupid?

2 Answers

James answered 7 years ago

engine 3.8 l v6 gt gtp. Do i need the garden hose pressure? I tried to just gravity feed water into it and it would go.

Mark helpful

James answered 7 years ago

"Take the hose off the outlet of the heater core, and use a temp very long one to return to the radiator (cap off) and see the flow." and just run it like that? no over heating problems.

Mark helpful

Your Answer:

Related Questions

  • Heater core Problems? 2 Answers

    I have a 2002 pantiac grand prix. Currently it has no heat. the car reads the temp just fine so I don't think its the thermometer. The heater core hoses are both warm but not hot. I wasn't sure what...

    2002 Pontiac Grand Prix GT

    -

    Maintenance & Repair

  • Heater core 3 Answers

    where is the heater core located on a 1997 Pontiac grand prix

    1997 Pontiac Grand Prix 2 Dr GT Coupe

    -

    Maintenance & Repair

  • Heater core 1 Answer

    I have a 2004 grand prix that has a bad heater core . My question is can I bypass the heater core and will it do any damage to my vehicle. Also how long can I drive the car with the heater core byp...

    2004 Pontiac Grand Prix GTP

    -

    Maintenance & Repair

  • Is heater core leaking? 2 Answers

    I have a 2007 Pontiac Grand Prix. For a while I have been smelling coolant . Now I keep getting tiny spots on outside of my windshield and looks like streaks on top of my car. Looks like so.e ty...

    2007 Pontiac Grand Prix Base

    -

    Maintenance & Repair

  • heater core cleaning 1 Answer

    1999 pont grand prix blower motor comes on whenever i turn it on but no air presure. Nothing my question is does the heater core have air flow thru the body of fins and can that plug up ? How to c...

    1999 Pontiac Grand Prix

    -

    Maintenance & Repair

Grand Prix

Looking for a Used Grand Prix in your area?

CarGurus has 3 nationwide Grand Prix listings and the tools to find you a great deal.

Postal Code:

Shortcuts

Search Pontiac Grand Prix Questions

CarGurus Experts

  • #1
    munron
    Reputation
    8,150
  • #2
    james sparrow
    Reputation
    7,480
  • #3
    Dorian Hendricks
    Reputation
    6,030
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Pontiac Bonneville
2 listings
Used Chevrolet Impala
11 Great Deals out of 128 listings starting at $3,495
Used Pontiac Firebird
20 listings
Used Chevrolet Camaro
17 Great Deals out of 475 listings starting at $11,999
Used Chevrolet Monte Carlo
7 listings starting at $7,499
Used Ford Mustang
36 Great Deals out of 1,633 listings starting at $7,999
Used Toyota Camry
59 Great Deals out of 1,091 listings starting at $2,500
Used Pontiac Grand Am
2 listings
Used Chevrolet Corvette
22 Great Deals out of 796 listings starting at $15,900
Used Honda Accord
50 Great Deals out of 986 listings starting at $2,995
Used Buick Regal
5 Great Deals out of 22 listings starting at $6,395

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. Content will be removed if CarGurus becomes aware that it violates our policies.