Heater Core replacement, do it right or halfass - JeepForum.com

 
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post #1 of 6 Old 03-14-2017, 08:57 PM Thread Starter
Mp5ben
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Heater Core replacement, do it right or halfass

Background, Motor blew because of a exploding heater core being the biggest factor..

New engine, but heater core will have to be bypassed till I can repair it.

I have a FSM (if you need one post here and I'll drop a link) and have reviewed the steps to heater core replacement and it DOES require pulling whole dash(instrument panel*) to get to HVAC box and core.

I've seen where people pull the glove box, drill out a few spot welds and...a heater core appears??.... and its just Remove and Replace. Im worried about the braces that you drill out the welds on, Is this going to lead to a creaky less strong dash etc?
Also, I'm not entirely sure if the metal heater core hoses blew, or the actual heater core...either way the core leaked so it needs to be replaced regardless, Are the metal hoses also replaceable with the glovebox method or does THAT require the entire dash to be removed?

Looking for insight on how to replace!


05 WK Limited, HEMI 5.7, QD II, OME HD, 255/75/17 Mud terrains
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post #2 of 6 Old 03-15-2017, 09:15 AM
RCS1300
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Pull the dash and do it right. It is basically a bunch of fasteners plus you have to make sure the steering wheel is straight and re installed correctly. I have not had to do mine yet but my plan is to pull the dash.

There are a couple of detailed youtube videos on the previous model year Jeep Grand Cherokee.
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post #3 of 6 Old 03-15-2017, 09:23 AM
oldfamilyguy
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I did the "cheat" method, worked out real easy. Its a bit more involved than just taking out the glove box. Replace the spot welds with small nuts and bolts and lock washers.
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post #4 of 6 Old 03-20-2017, 01:07 AM
UnboundWK
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Quote:
Originally Posted by oldfamilyguy View Post
I did the "cheat" method, worked out real easy. Its a bit more involved than just taking out the glove box. Replace the spot welds with small nuts and bolts and lock washers.
I also did the heater core this way. worked great. no issues. only took about an hour or two taking my time rather then a full day + to R&R the full dash
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post #5 of 6 Old 03-20-2017, 08:26 AM Thread Starter
Mp5ben
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Quote:
Originally Posted by UnboundWK View Post
I also did the heater core this way. worked great. no issues. only took about an hour or two taking my time rather then a full day + to R&R the full dash
Were you able to get to the metal lines as well? The FSM drawings dont really show if the heater core lines are accessible easily or if there are more steps to remove those.

And with bending the dash...did it all go back together seamlessly? or is it apparent it was manhandled lol

05 WK Limited, HEMI 5.7, QD II, OME HD, 255/75/17 Mud terrains
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post #6 of 6 Old 03-20-2017, 08:07 PM
UnboundWK
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Quote:
Originally Posted by Mp5ben View Post
Were you able to get to the metal lines as well? The FSM drawings dont really show if the heater core lines are accessible easily or if there are more steps to remove those.

And with bending the dash...did it all go back together seamlessly? or is it apparent it was manhandled lol
The heater core is in that black housing in the center of your dash. I took mine apart further than i needed to as i was working on other things as well. I thought i had a better picture than this. If i find it i will let you know



Found it




You can see there is one bolt holding the lines to the heater core. Getting to it isn't the problem. its getting it out, which requires the spot welds to be ground out. Youll see exactly which ones when you get there.

This the video i found that gave me the idea -
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