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-   -   How to replace heater core on a 94wrangler (http://www.wranglerforum.com/f218/how-to-replace-heater-core-on-a-94wrangler-205951.html)

auctioneer 12-17-2012 02:42 PM

How to replace heater core on a 94wrangler
 
My sons 94 Wrangler is smoking on the inside through the heater/defrost vents, slight puddle of anti freeze inside and out. I am assuming its the heater core.

Can someone give the breakdown on how to replace the heater core?

Thanks

Blackjack93 12-17-2012 04:19 PM

best thing to do is to go down to local auto parts and buy a Haynes repair manual, step by step how to replace it

auctioneer 12-18-2012 02:08 PM

Thanks will do.

Huntsman180 12-18-2012 02:34 PM

Oh he'll no! Get a chilton. And don't settle for anything else.

yjreyn 12-31-2012 06:29 PM

Just did it on my '90
 
Easy fix, it might differ slightly because mine is a little older, but they're pretty similar so here are the instructions for mine. First off get a new heater core, rockauto.com had the cheapest one for my vehicle. There are three nuts on bolts that come through the firewall that are 7/16th's in size, one is under the battery cradle. Take those off, easiest if you take the battery cradle off to see it, as well as a plug that goes to the blower fan. Disconnect the coolant lines that go to the heater core, you're going to want to drain some of the coolant out of the radiator before doing this to help reduce a mess (you don't need to drain all of it). Next disconnect the cables to the vents and pull out the heater unit from under the dash. Once that is out, take the screws off the back of the unit to reach the heater core, replace and re-install, easy! I did this in about an hour. Good luck!

bangingears 12-31-2012 08:43 PM

^ that

however, buy some black RTV when you split the heater box apart you need to reseal the box, if you do not reseal the box you will blow hot and cold air all over the passenger.

Lincoln33 12-31-2012 08:50 PM

Quote:

Originally Posted by Blackjack93 (Post 3114419)
best thing to do is to go down to local auto parts and buy a Haynes repair manual, step by step how to replace it

Quote:

Originally Posted by Huntsman180 (Post 3118265)
Oh he'll no! Get a chilton. And don't settle for anything else.

I have both, they're the same books, word for word, pictures are pretty much the same too. I didn't know that when I bought them since they were wrapped in plastic. I bought the OEM service manuals later and they're the best way to go, just my two cents.


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