For heater core replacing procedure. I suggest you to go through
this related help links.Its all complete step by step procedure: ----How to replace heater core for All car models? Click the link below: --- http://technoanswers.blogspot.com/2011/11/how-to-replace-heater-core-for-all-car.html -------------- http://schematicsdiagram.blogspot.com/2011/12/how-to-flush-heater-core.html --------------- http://howtobyme.blogspot.com/2011/12/how-to-remove-heater-core-on-2008-honda.html http://howtobyme.blogspot.com/2011/12/honda-heater-core-replacement.html ------------ How to replace heater core?http://technoanswers.blogspot.in/2012/02/how-to-replace-heater-core-on_10.html
How to Flush Heater Core?
How to Remove Heater Core ?
Heater Core Replacement?
To replace heater core?http://technoanswers.blogspot.in/2012/02/how-to-replace-heater-core-on.html------
----------This will help.Thanks.
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 disassembled to get to the heater core.
Heater Core
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.
SOURCE: how do you install a heater core in a 1999 jeep
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.
SOURCE: how to remove heater core
Is a typical case, but we can use like a general method:
First remove all the water from your system by
draining the radiator, it's best to do it this way so you can add new
coolant and keep the mess to a minimum, after your water is drained, go
ahead and remove the heater core feed lines.
Make sure that after you have installed
everything and you fill your system with water, slide your heat temp
control to full heat the check everything for leaks!
For the specific case, Grand Cherokee, check this info, maybe the answer are in there: ZJ Secc 24 Heating and Air Conditioning (Page 41 and Next)
Good luck!!!
SOURCE: Heater Core replacement
yes you do have to disconect the a/c system.google dash removal for jeep.hope this helps
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