how hard is this to do on a 97 xj with air, 4.0?

 

idk about a 97 but my 96 was pretty easy. jus undo ur blower inside the engine bay. take out like 3 bolts on the firewall from the engine bay. take the center console out. undo ur hose to the heater core and then the black box under the dash slides out and u can replace it. this is wat i followed

http://www.naxja.org/forum/showthrea...%20replacement

 

I believe on the 97+ u have to remove the whole dash....here is a link with lots of good info... http://www.jeepforum.com/forum/f11/m...thread-592844/

 

awem man i hope i dont have to do this,, nothing leaks, the radiator was loaded with brown coolant hahah i flushed it out a few times, ran the hose in both direction got a lot of junk out, but now the heat isnt nearly as good as it was, not sure if its that clogged of should i look somewhere else?

 

Disconnect the two lines for the heater core at the motor. Blow out any excess fluid. While keeping the houses higher than the motor pour in some CLR. Keep the houses elevated (use the windshield wiper to hold them up) and let the solution sit for about 30 minutes. Flush out the heater core thoroughly. Then top off the cooling system after you reconnect the hoses. You'll probably have to top off the cooling system after you've ran the motor a couple times. I suggest keeping a bottle of coolant in the jeep.

 

,, awesome, , i will try that this weekend, i really dont wanna swap out this HC,, does not look fun ata ll, thx for the info, ill post back to let u know how i made out

 

Go to www.ericthecarguy.com and search for his video on clearing a clogged heater core. He does what I described above but you'll get a better idea if you actually see what's happening.

 

you are the man, ill be doing it first thing in the morning,, thx again for the help

 

For a properly diagnosed clogged heater core (be SURE about this), I first try backflushing the heater core both ways with garden hose pressure.

If that isn't successful, I always try the CLR method. I have had success 3 times personally with this method.

What have you got to lose? If the CLR method doesn't work, you have to tear the damn vehicle apart to put a heater core in, so it is always worth a try...........and if it doesn't work, clear your schedule for a solid day to replace the heater core.

Direct link.

 

I back flushed mine a few months ago but didn't have any CLR on hand...i thought I did. But the heart has been working cuz before I flushed the heater core I had zero heat. I plan on doing the CLR flush soon though.

 

well it worked, that video was great, i have kick butt heat now, thx again for all your help

 

Awesome!! Glad you got the heat working!!

 

I cannot tell you how many people have been helped and have been successful with the CLR flush method.

CLR really seems to work well on the calcified crap in the heater core...........

 

Yeahhhh I still need to soak mine in CLR but haven't had a chance. With winter almost over in southern cali there is almost no point.....but then again I don't want to have to bother with it next year during winter

 

hahah i hear ya, its still a lil chilly here in NJ though,, but i dont mind the cold right now since im toasty warm hahahah, THX AGAIN