Question about 1997 Jeep Grand Cherokee

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Remove leaking heater core from 1998 Jeep Grand Cherokee Laredo.Have done this job on other much simpler cars in the very distant past.I can assemble and disasemble almost anything but this can be a very humbling experiance with or without some guidance. Thank you.tom

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Unbelievably and needlesly complicated. example of chrysler over engineering cheep design--- literally have to take the ENTIRE dash assembly apart. utterly ridiculous-- i would not advise unless you have experience or lots of apptitude to learn- about as bad as it gets-- lots of easily breakable **** parts- be careful

Posted on Aug 30, 2010

  • pedro bighead Dec 09, 2010

    Do not even attempt to do this unless you are some sort of jeep wizard, I am and theres no way i would attempt this. Unless the thing is litteraly leaking on the floor don't try this. As mentioned you will have to dismantle the entire dash and everything connected to the firewall.
    I suggest these steps to overcome your heating/cooling problem it that is what your issue is. I just headed into winter in northern ontario and found that the jeep heater was woefully inadequate for the season whcih can approach minus 50C, yup minus 50C. I have done all of this and now im getting heat, lots of it. You cannot use defrost etc and keep warm you will have to add a small fan or heater to keep the windsheil clear as they frost up something awful.

    first get a reputable mechanic to flush your whole system including and specifically the heater core which sits behind the firewall and directly behind the whole dashboard. Once flushed and refilled make sure there is no air in the system, if you hear bubbling you have air and it needs to be purged immediately. to purge replace the rad cap with a brand new one and run the car with the rad cap loose until it reaches the full temp of 197 degrees. all bubbles will dissipate and then the cap can be tightened. Make sure you have a cloth or towel over the therad cap as it and the fluid are very very hot. next locate the recirc door and make sure it works properly, if not replace the foam on both sides and make sure it seals correctly. Next and this is very difficult as well, check and do the blend door repair. Mine is mint (got lucky) and the recirc door works correctly. Install an inline heater in your heater core inlet hose. Next buy a cheap fan heater and leave it on your dashboard. Ultimatley you should get heat and or cold air when the system is correctly fixed and maintained. The blend doors are a major recurring issue with these jeeps and usually the heater core is not the problem, the blend doors are the problem.

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Its a tough job. You have to remove the dash panel, including the steering wheel and steering column and then remove the plenum box which involve evacuating the refrigerant system and draining the radiator. Once you get the heater box out, replacing the heater core will take about 10min and then you have to put it all back together and recharge the A/C and fill the radiator.

Changing the heater core requires complete removal of the dash panel and plenum box. To do this you have to remove the steering wheel, steering column, evacuate and recharge the refrigerant system and drain the radiator. I would only consider changing the heater core if it is physically leaking into the passenger compartment. If the problem is heat transfer to the A/C system only, the problem is more likely with the blend doors.
If you are seeing leak problems with the system, you will have to go through this process. If the problem is lack of heat and/or A/C control, the problem is more likely the blend door. This is a common fail on the Cherokee. Remove leaking heater core from - 8197a00.jpg

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Remove the heater core box from the Jeep:

Posted on Aug 24, 2010

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1 Answer

Heater core leaking 2004 grand Laredo gotta pull the dash or is there a short cut, keep in mind I own a torch and a welder and hammer agood weld just means i'ma good grinder op. .


Here's a link on replacing the heater core,your welder and grinder won't help,it's a job and expensive to pay someone and they don't know how.I did mine in my 85 nissan,had to lift dash cause one bolt is shared with heater core box and another box.

Jun 06, 2013 | 2004 Jeep Grand Cherokee

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How to replace heater core in a 1998 jeep grand cherokee


Inspect/Replace 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 29, 2010 | 1998 Jeep Grand Cherokee

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

How to remove the heater core from a 1998 Jeep Cherokee Sport?


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 13, 2010 | 1998 Jeep Cherokee 4WD

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Heater core replacement, 2000 Jeep Grand Cherokee Laredo. Why do I have to evacuate the freon?


you need to evacuate the freon because in order to get the heater core out you also need to remove the evaporator for the AC. (great design huh?)

Nov 02, 2010 | 2000 Jeep Grand Cherokee

1 Answer

I need help with heater core replacement for my 1999 jeep grand cherokee laredo


Changing the heater core requires complete removal of the dash panel and plenum box. To do this you have to remove the steering wheel, steering column, evacuate and recharge the refrigerant system and drain the radiator. I would only consider changing the heater core if it is physically leaking into the passenger compartment. If the problem is heat transfer to the HVAC system only, the problem is more likely with the blend doors. Check heatertreater.net for pictures and diagnostic information.

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2 Answers

How do you install a heater core in a 1999 jeep grand cherokee?


I suggest review the ZJSecc24-Heating-and-Air-Conditioning

First you'll need remove the heater A/C unit from the vehicle; after, remove the heater core retaining screws, and finally, pull the heatrer core straight out of the housing.

Hop helped with this (remember rated this help) Good luck.

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youtube.com type in 1998 grand cherokee headlight assembly, I just fixed mine in 10 minutes, both of them!

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