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How to replace a heater core in a 2002 impala

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Posted on Jan 02, 2017

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emissionwiz
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SOURCE: 2002 DODGE 2WD HEATER CORE REPLACEMENT

first off, disconnect your battery for at least 30 min before touching any plugs or harnesses. next, bleed your A/C and disconnect the quick connects that go inside the firewall. drain your coolant, and disconnect hoses from firewall. note a certain bolt with nut on it that is going to the inside of the firewall, you'll need to take that off when you get to the airbox inside the truck which houses your heater core. next, take off the pillar handles next to the windshield, then pop off the plastic dash panel with defroster vents. there are a few bolts up there that need to be taken out all the way across. next, take off your glove box. remove plastic below the drink carrier. there are 2 bolts there on left and right once you remove the plastic. there's a yellow or red AirBag plug which you may or may not need to disconnect later. next, drop down the whole steering wheel column. 4 bolts I believe. look up under there on both sides, you will see a 2inch piece of tubing that goes from each side of the truck. your dash and everything you see in front of you is connected to that tube. find on each side of the truck where that tube is mounted to the body with brackets. There are 2-3 bolts on each side I think. When you get those out, and the steering wheel is sitting in the seat or on the floor, the whole dash and panel should tilt and lay on the seats. there are wires from your a/c controls and radio which you'll have to disconnect and some various other wires as well. I also think you'll have to disconnect a harness plug with bolt in it on the drivers side. (white) after you've done all that and don't have the dash and panel in a bind with wire hangups you can now get to the air box. I don't remember how many bolts, but don't forget the one in the engine bay going to it also. get the box unbolted, then roll it up, remove 2 clips holding the heater core in, replace heater core and do this whole process backwards. Hopefully you didn't lose any screws or bolts. charge your a/c, replace coolant, make sure all plugs are connected before connecting power. Should save you $400-$500 in labor.

Posted on Mar 25, 2009

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allinbilly
  • 14 Answers

SOURCE: CHANGING THE HEATER CORE OF AN 04 IMPALA

Drain the coolant. Remove the dashboard first, then a bunch of air ducts, then the heater core cover. Remove the heater hoses in the rear of the motor, and finally the heater core.

Posted on Feb 21, 2009

  • 454 Answers

SOURCE: How do replace heater core in 2002 Pontiac Gran Prix

i do believe you have to take the passengers side dash apart behind the glove compartment. go to autozone and get a manual or go to the library and check the chiltons manual. this is not an easy job. how bad is the leak? if its not bad these heater cores are made of all aluminum. i would buy a bottle of that radiator additive and see if that takes care of the problem first. it only cost about 5 bucks a bottle and it may permanantly fix your problem.

Posted on Aug 13, 2009

  • 1024 Answers

SOURCE: How do I remove the dash board of a 2003 Impala to replace heater

you don't have to remove the dash to do this job

Posted on Mar 07, 2010

Testimonial: "What a relief, now I must find out how to replace it."

  • 3230 Answers

SOURCE: replace heater core on 2002 Buick Rendezvous

Hi there,

Well the heater core is located under the dash on the passenger side, usually cased in a plastic housing.You may have to remove the glove box in order to have access to. And when you get to the point, when you are disconnecting the coolant lines and remove the core you use some clothes to protect the carpet as fluid may drip. Post comments for further help or information........
Good Luck!!

Thanks for using FixYa!!

Posted on Oct 13, 2010

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Changing heater core


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Feb 03, 2016 | 2005 Chevrolet Chevrolet Impala LS

1 Answer

How to replace 2008 impala heater core


Most heater cores are located behind the dashboard. This can be a difficult job putting it back together. Be sure it really is the heater core. ie water on the floor boards,the smell of antifreeze inside the cabin.Steamed windows all indicate the heater core.

Oct 12, 2012 | 2008 Chevrolet Impala

1 Answer

Im working on a 2006 chevy impala lt.....im replacing the heater core and i cant get the heat steaks off......all the manual says is that i need to use a chisle......but do i cut them off and if so what do...


I would drill them dimples by the heat stakes out and install heater core cover screws. Both inside the heater core cover and the heater air outlet cover. use a 7/32" or a 5.5mm bit.

Mar 22, 2011 | 2006 Chevrolet Impala

1 Answer

I have chevy impala 2002 and lately I have been hearing water sloshing (sounds like it s coming from the dashboard...), any idea what is it? and can be fixed?


Sounds like air in your heater core. That's the only place fluid comes into passenger compartment. To eliminate, make sure coolant level is filled completely or have cooling system flushed.

Feb 21, 2011 | 2002 Chevrolet Impala

1 Answer

Check the relays, fans, change the thermostst, now about to the change heater core. it sill was over heating and water came from the heater core on to the floor board.


If it is necessary to remove the heater assembly, the cooling system must be drained before removing the heater core.
When a heater core leaks, a new heater core is installed or the old one repaired.
Heater Housing
  • The heater housing is usually under the dash and must be removed to gain access to the heater core.
  • Procedures for replacing the heater core vary with the year, make, and model of car. It threfore necessary to consult the manufacturer's repair manuals for the proper procedure for replacement.
f74-01.gif The heater housing is disassembled to get to the heater core. Heater Core
  • Remove the access panels(s) or the split heater/air conditioning case to gain acess to the heater core.
  • Remove the heater coolant hoses.
  • Remove the cable and/or vacuum control lines (if equipped).
  • Remove the heater core securing brackets and/or clamps.
  • Lift the core from the case. Do not use force. Take care not to damage the fins of the heater core when removing.
  • To reinstall the heater core, reverse the removal steps.
When the heater core leaks and must be repaired or replaced, it is a very difficult and time-consuming job primarily because of the core's location deep within the firewall of the car. For this reason always leak test a replacement heater core before installation.

Dec 22, 2010 | 2002 Chevrolet Impala

1 Answer

Coolant leaking from fire wall side of engine. already replaced intake gaskets.


More than likely you have a defective heater core. What is happening is that the coolant is coming out of the heater box drain. This happens so that the coolant doesn't end up in the car like the older models.

Nov 19, 2010 | 2002 Chevrolet Impala

2 Answers

Pipe that comes out of thermostat and goes into firewall is leaking coolent in '02 Impala, 3.4 liter? Whats this pipe? and can i use pipe dope or something?


This sounds like it goes to your heater core. It is like a small radiator inside your car that circulates hot engine coolant to give you heat when you turn on your heater. You should have rubber hoses that connect the heater core to the thermostat housing. Look closely as to what is leaking, the rubber hose, or the thermostat housing, and try to "snug" up the hose clamp if you can. Some time the thermostat housings corrode and leak. You will need to replace it if that's the case.(Keep in mide that some vehicles use clamps that are spring type, and you can't snug them up)

Sep 14, 2009 | 2002 Chevrolet Impala

1 Answer

Heater core problem?


It is a tough job-wayunder the dash. buy a chilton manual and see if it looks like something you want to tackle. THe manual willkeep saving you $ Good luck

Jan 20, 2009 | 2002 Chevrolet Impala

1 Answer

Low heat, frost inside car, burning smell


it sounds like your heater core is faulty(under the dash) does it smell funny in the car?if yes then your heater core needs replacement

Jan 20, 2009 | 2002 Chevrolet Impala

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