Question about 1998 Pontiac Grand Prix

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Heater core the two covers that go over the core itself are kinda a no brainer...but there is a triagular vacumm cylinder with 2 lines on it the i cant figure mounting you know or do you know where i might see a diagram..please help.....need to get only trans going....thank you

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  • yadayada
    yadayada May 11, 2010

    no I am sorry, try a web search.



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1 Answer

1995 cadillac elderado how do i replace the heater core?

take the glove box off take the lower cover off take off take the ac controller off it has a bunch of vacumm lines but first take the hoses off inside the hood 2hrs labor .

Apr 17, 2013 | 1995 Cadillac Eldorado

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How do I check to see if the heater coil is plugged

The fan is usually the problem - does the fan run? If the fan is good, remove the fan and use a mirror and flashlight to inspect the coil. It would be unlikely that the coil is completely plugged but it can happen.

Dec 27, 2012 | 2002 Lexus IS 300

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I need to replace the Heater Coil in my 1995 Chevrolet 1500 5.7 L 2 wd

Hi, First thing lets drain coolant out of radiator.
Next take heater hoses off heater core inlet and outlets.
Then go to passenger side of truck under dash take the 5.5mm screws out of plastic peace coming down by the hump that looks flat. There is screws on back side of cover to, kinda hard to get to but you can. Remove cover then you will be able to get to heater core there is one screw with a bracket that holds heater core in place remove it then remove heater core. Put back in same order. Thanks if i can help just re post.

Jan 09, 2011 | 1995 Chevrolet K1500

1 Answer

Heater core. where is it located and how do you replace it?

Heater Core REMOVAL & INSTALLATION For the removal of the heater core, which is located inside the heater-A/C unit assembly, first remove the heater-A/C unit assembly from the vehicle as described later in this section. Once the unit has been removed, use the following procedure to extract the heater core:
  1. Place the heater-A/C unit on a suitable work surface.
  2. Locate and remove one retaining nut from the blend-air door pivot shaft.
  3. To remove the top cover from the heater-A/C case, the crank arm must be removed.
  4. Disconnect the vacuum lines from the defroster and panel mode vacuum actuators and position them out of the way.
  5. Remove the 3 heater-A/C unit cover attaching screws, fastened upward at the defroster outlet chamber.
  6. Remove the 2 heater-A/C unit cover attaching screws, fastened upward at the air inlet plenum.
  7. Remove the 11 heater-A/C unit cover attaching screws, fastened downward into the housing. Then lift the cover from the heater-A/C unit.
  8. Remove the old heater core from the case. To install:
  9. Install the new heater core into the heater-A/C unit case in the same position as the old one.
  10. Place the cover onto the case and secure in place with the 11 retaining screws.
  11. Install the 2 heater-A/C unit cover attaching screws in the air inlet plenum.
  12. Install the 3 heater-A/C unit cover attaching screws in the defroster outlet chamber.
  13. Attach the vacuum lines from the defroster and panel mode vacuum actuators to the heater-A/C unit case.
  14. Install the crank arm and the retaining nut on the blend-air door pivot shaft.
  15. Install the heater-A/C unit assembly into the vehicle.

Oct 13, 2010 | 1990 Chrysler New Yorker

1 Answer

Its raining coolant down the back of the doesn't seem to be the block plug.its coming from above that.the hoses seem to be fine.have been suffering poor heater performance in the cabin and you...

Sounds like you know the problem...the lines leading from block to heater core, possibly the core itself (smell in compartment). Try to visually find the leak point before jumping in. Check the mechanically or electrically operated heater valve on line into core if so equiped, I have seen these go bad on many diffferent vehicles...

Oct 01, 2010 | 2000 Oldsmobile Bravada

1 Answer

Heater not getting hot for a 1999 toyota 4runner

the heater switches in the 4 runners can someetimes get jammed because of corrosion inside the tap itself the easyest way to see if its jammed is to locate it behind the engine down near the firewall you will see two hoses running through the wall and one of these will have a tap . looks like a plastic fitting with either a rod with an actuator aarm or vacumm line running to it . witht the engine up to running temperature and the heater on check the side of the tap that runs to the engine for heat . if is cold then the tap is jammed closed . if its hot then you may have a blocked heater core

Dec 13, 2009 | Toyota 4Runner Cars & Trucks

1 Answer

Bad heater core

look undre the passenger side dash and you will see a black box. Look closely and you will see screws in it around the edges. remove all the screws then remove the cover,there is the heater core, held in by 1 screw that is kinda hard to see. next look under the hood on the passenger side firewall right in front of the dash, you will see 2 hoses with clamps on them. loosen the clamps and remove the hoses. you may want to drain the radiator first but I never do

May 04, 2009 | Chevrolet C1500 Cars & Trucks

2 Answers

There is antifreeze leaking from the rear of my 2005 kia sedona. I I am not sure what it is leaking from but there is 2 hoses under there! Why would there be antifreeze in the rear of the van?

many vans have rear heater cores for added passenger comfort, so this is not unusual, it is very possiable either the hoses or there connections to the rear eater core are leaking or the heater core itself is leaking.

Jan 05, 2009 | 2005 Kia Sedona

2 Answers

1993 taurus heater core replacement guide

This is a big job which involves discharging and removing parts of the A/C system as well as removing parts of the dash. I had the core done on a 94 Sable years ago and it was a very labor intensive and expensive job. Here are some instructions I found for a 94 Taurus which should be the same thing or similiar, but I don't guarantee that. Please note that these instructions were not tested by me and may contain errors or be incomplete in some way. For example "remove instrument panel" sounds simple but in reality is a process in itself requiring the removal of many screws. Naturally you would have to recharge the A/C and refill the coolant when done.

1. Remove instrument panel and lay it on front seat.
2. Remove A/C evaporator housing as outlined.
3. Remove vacuum source line from heater dash panel seal (18529).
4. Remove heater dash panel seal from heater core tubes (refer to Heater Case Assembly).
5. Remove four heater core access cover retaining screws and remove heater core cover (18B300) from A/C evaporator housing.
6. Lift heater core and seals from A/C evaporator housing.

1. Transfer three foam core seals to new heater core.
2. Install heater core and seals into A/C evaporator housing.
3. Position heater core cover on A/C evaporator housing. Install four retaining screws.
4. Install heater dash panel seal on heater core tubes.
5. Install vacuum source line through heater dash panel seal.
6. Install A/C evaporator housing into vehicle as outlined.
7. Reinstall dashboard components.

Best of Luck!


Aug 19, 2008 | Ford Taurus Cars & Trucks

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