mannyXJ

I am lookong to replace my heater core tomorrow on my xj and hear they are a a pain in the ***. Does anyone have a step by step procedure i can follow to make this as easy as possible or any pointers, thanks - manny

mikesignal

most people will also replace the evaporator core at the same time. ....first thing you need to do is disconnect the battery --the links are write ups that should help you.

https://www.cherokeeforum.com/f51/97...cement-219723/

http://www.jeepforum.com/forum/f11/m...thread-592844/

DFlintstone

Heater Core pinhole leak. Just some smell and the windshield fogging up? Find the small (3 oz?) tube of Aluma-Seal brand stop leak. (no other brand). Put just 1/2 of that in a soda bottle with a cup or so of water. Before a long drive, shake it up and add it to your coolant. If it's still leaking in a week, repeat with the other 1/2 tube. If it's still leaking after another week, it's not going to work. It won't clog your core, but even if it did you were going to change it anyway! I've had success with this at least 1/2 a dozen times. Subaru, Volvo, Toyota, Tempo, couple Jeeps....it works.

Here is a link for 87-90 core replacement>>> http://www.naxja.org/forum/showthrea...%20replacement

Heath159

I did one years ago. I remember it would be easier if I pulled the passage seat out 1st.

investinwaffles

It's a fairly simple and "easy" process, just a bit time consuming. Look on YouTube for some video tutorials (there are a few).

Make sure you have everything you need before you start, I would suggest doing the evap core at the same time.

Read this before and after the traditional how-to guides

https://www.cherokeeforum.com/f51/97...cement-219723/


How tos

http://www.fourwheeler.com/how-to/en...e-replacement/

http://www.jeepforum.com/forum/f11/m...ge=1&_k=vxo8z4

Good luck!

BlueRidgeMark

Yep. That or the same company's Copper Seal. Any other stop leak will gunk up your system.

SeaVee

BlueRidge Mark- I'm gonna give your idea a try. How long a drive are you talking about? Hour? 2? Just want to do it right.
Thanks-SeaVee ( over here in VB, love to get my jeep up your way!)

BlueRidgeMark

Which idea? The Amway flush? Not what you need for a leak, but if your system needs flushing, leave it in there for a few weeks of normal driving.

DFlintstone

Eddited

mo8414

A couple table spoons of pepper will plug small cooling system leaks. I did it on my goldwing with good results.

SeaVee

BR Mark- I was referring to the AlumaSeal solution . Figured I'd try that as a last ditch effort. Just getting a little coolant smell and fog on passenger side of windshield. I saw on the AlumaSeal site it takes 300 miles of driving to set up. I don't normally drive that much in a month. Guess I might have to take a trip.....

BlueRidgeMark

Yeah, just drive it around for a an hour or so. The more the better, of course.

BillyBoy

If you have to replace it don't pull the steering column. Unholy it down, while straight and DO NOT pull the adjuster lever when disconnected. If it bends up you so that get it back in.
I pulled my dash half way back by connecting the passenger side dash with a long bungee cord to the driver side backseat oh Shoot! Handle on the ceiling. It was up and out of the way. If you can pull the passenger side seat I think that'd be worth the time also. My bolts were too rusty to do that though.

BlueRidgeMark

Try that again in English, please.

BillyBoy

Ha! Damn auto correct!

Unhook it while straight, and DO NOT pull the lever to bend it!