Question about 1990 Chevrolet K1500

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How to remove the heater assy to access the heater core? The dash has been disassembled and tilted back per the factory manual. I cannot find the bolts/screws holding the unit to the firewall. The heater hoses have been removed.

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You do not have to pull the heater box out to chg. the heater core unless there is something else you are going to do. On the right side under dash there are 6 or 7 small 1/4 inch screws that have to come out and the front of the heater box will come off and there is the heater core, beware there is 1 screw thats a bear to get because you can't see it, its above the blower motor to the right, a lot of people including mechanics don't put it back in when they chg. out the core.

Posted on Oct 02, 2009

Testimonial: "Thanx for the correct info. The Chilton Manual I read is also correct. My Factory Chevy Shop Repair Manual is incorrect for this repair. "

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1 Answer

How do I change the heater core in a 2002 chevy trailblazer?


heater core in trailblazer is a very complicated procedure. It involves disabling the air bag system and removing the entire dash (actually tilting it back against seat) to access the heater core box. It also involves removing some parts under the hood to release it from the firewall.

Oct 17, 2011 | 2002 Chevrolet TrailBlazer

1 Answer

How do i remove the heater core from a 1988 audi 90? ... my heater core blew and i was wondering if i can get to it from under the dash or if i will have to remove the entire dash to get to it?


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 27, 2010 | 1988 Audi 90

1 Answer

I replaced heater core on 97 ford f150 need map on how everthing goes back together


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 21, 2010 | 1997 Ford F150 Regular Cab

1 Answer

How do you access the heater core?


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 20, 2010 | 1990 Ford Tempo

1 Answer

Im replacing the heater core in 2001 jeep cherokee...i have the dash off down to fire wall...all screws are out of bottom heater box but I cant remove the bottom of box to get to heater core...what am I...


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 19, 2010 | 2001 Jeep Grand Cherokee

1 Answer

Would like to remove heater core in the dash


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 08, 2010 | 2001 Lincoln Navigator

1 Answer

2000 windstar is leaking coolant behind motor and smells with ac on...Heater core?


Yes u have a leaking heater core, below fin d the instructions to replace it.
1997-2000 Ford Windstar 3.8
Heater Core
Inspect ' Replace
Drain the cooling system

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 is therefore necessary to consult the manufacturer's repair manuals for the proper procedure for replacement.
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 access 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.

Oct 25, 2010 | 2000 Ford Windstar

1 Answer

Trying to replace heater core 1994 s10 4 cyl


GM S-Series Pick-ups and SUV's 1994-1999 Repair Guide



Heater Core - REMOVAL & INSTALLATION
1994-97 Vehicles
(see Figure 1)

44d2ba8.jpg

Fig. 1: Exploded view of a common heater core and case assembly
  1. Disconnect the negative battery cable and properly drain the engine cooling system to a level below the heater core.
  2. Disconnect the heater hoses from the core tubes near the cowl.
The instrument panel carrier is designed not only to provide access to parts through removal of the carrier components, but the carrier will also tilt downward as a complete assembly to allow access from the top. If this is desired, remove the retainer screws along the top and bottom of the carrier assembly (refer to the figure). The instrument panel will then tilt as an assembly into the cab. It is necessary to unbolt and lower the steering column from the carrier to allow for maximum movement of the instrument panel.
  1. The instrument panel must be removed or repositioned for access to the heater core case. Unbolt and either tilt the instrument panel forward or disengage the instrument panel components and remove the panel from the vehicle. In most cases, tilting the panel forward should be sufficient for the necessary access.
  2. Unfasten the heater core rear case retaining screws, then remove the rear case for access to the heater core.
  3. Loosen the retainers and remove the heater core retaining straps.
  4. Remove the heater core and seals.
To install:
  1. Install the heater core and seals, taking care not to damage the core tubes when inserting them through the cowl.
  2. Install and secure the core retaining straps.
  3. Install the rear case and secure using the screws.
  4. Reposition and secure the instrument panel and components. Tighten the cowl screws to 17 inch lbs. (1.9 Nm) and the lower instrument panel screws to 66 inch lbs. (7.5 Nm).
  5. Connect the heater hoses to the core tubes.
  6. Connect the negative battery cable, then properly refill the engine cooling system.
  7. Run the engine at normal operating temperature, then check for leaks.

Good luck (remember rated this post).

May 19, 2010 | 1994 Chevrolet S-10

2 Answers

Need to change heater core


The dash has to be removed to gain access to the heater box, a factory repair manual is a 100% must have for this job. The heater box then comes out and is split open to replace the core.
this is not a job for anyone except a experienced mechanic, about 10 hour job, a factory service manual is a must, u can buy a factory manual here.
follow link
http://www.faxonautoliterature.com/product.cfm?p=5466&cs=products%2Ecfm%3Fvt%3D1008%26mk%3D6317%26yr%3D1988

Nov 13, 2009 | 1989 Ford Crown Victoria

1 Answer

Heater core leaks


yup you will have to remove the whole dash, unhook batteries and wait 20 min, for air bags, unhook all wires ect from steering colum and remove the colum as an assy, behind the kick panels both sides you should see some bolts holding the dash to the kick panel (some will have a sloted holes so you dont have to remove the bolts just loosen them (this allows you to tilt the dash back away from the winshield) unhook all nessesary wiring, heater controls, stereo wires ect.. remove screw's securing the upper dash to firewall, tilt dash back and check for any other wiring ect.. remove intire dash! now you will need to remove the intire heater box to gain access to the heater core, you can pinch off the heater hose's so you wont have to drain the intire cooling system, some of the vans used a quick disconect right at the firewall and require a special release tool to release them almost impossible without the tool, once this is done you have to evacuate the ac system and unhook the lines, then you can remove the heater box( nuts on the firewall engine side) and dissasemble to gain access the the heatercore! (not for the faint at heart) some models can take as long as 16 hrs to r&r so if your asking about doing one means your not going to have fun! I recomend taking it to the shop and have it done by pro's, or at least spend the money and buy a repair manual
make shure you do it in a heated shop cuase if you fight it in the cold your apt to break some plastic! take your time and dont get frustrated, it will pay off, and always vacum test the new core before installing it to make dang shure it doesent leak before you install it! reasemble in the reverse order, this is just off the top of my head but gives you a general idea what your up against! have fun!

Apr 14, 2009 | 1995 Chevrolet G20

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