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Unread 11-26-2013, 03:14 PM   #1
33chief
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Heater core

My heater core finally **** the bed. I bypassed the core and connected both hoses together.

I am going to be buying a new heater core. Am I better off with any one brand over the next?

I have an 87 4cyl, YJ, with no a/c

Thanks

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Unread 11-26-2013, 03:45 PM   #2
bpounds
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Quote:
Originally Posted by 33chief View Post
My heater core finally **** the bed. I bypassed the core and connected both hoses together.

I am going to be buying a new heater core. Am I better off with any one brand over the next?

I have an 87 4cyl, YJ, with no a/c

Thanks
I don't know about brands, but you want to find a replacement that has the mounting bracket soldered on one end. I bought my replacement core from rockauto.com. I didn't realize the difference at the time, but afterward I found that the direct fit replacement cost a little more, and I wish I had got one of those. The others just sort of fit in there, but can rattle around. I would buy it from rockauto again, but choose a different one.
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Unread 11-26-2013, 03:47 PM   #3
Rproject
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I got the OEM replacement from Rock Auto. Haven't had a problem since. Granted, it was kind of a B to get the heater duct out and to align the new core as I put the duct back together, but I'm very happy with the product.
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Unread 11-26-2013, 04:56 PM   #4
33chief
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Appreciate all the comments and advice.
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Unread 11-26-2013, 06:58 PM   #5
jay-h
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In general, for heater cores, best to get OEM. some people recommend copper or brass

I did put a NAPA in mine (turned out to be aluminum when it arrived, I put it in anyhow), had to fuss a bit to get the air seals right (so it wasn't a perfect replacement), but works ok.
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Unread 11-27-2013, 08:47 AM   #6
tom_sprecher
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It took me a couple of trips to NAPA, but none of their's had the mounting tab. Ended up buying this one off Amazon. It was not brass, but it did have the mounting bracket which is very soft so be careful when tightening the sheet metal mounting screws. I also bought some door or window weather stripping from Home Depot to help seal the core in the air box and some of this to seal the air box cover. The glazing tape worked great on the trans tunnel cover and shifter boot as well.
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Unread 11-27-2013, 10:37 AM   #7
Berniebikes
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just buy the whole plenum box, new fan and all. You can get one for around 140 on ebay, you're already doing the work it would take and at least with a new box you won't have to reseal the plenum and you will have new seals and a working vent door.
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Unread 11-27-2013, 06:12 PM   #8
Tom95YJ
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I run a OE replacement from Oriley auto, While your in there replace the Blowemotor with one from a Blazer also it'll really throw out some air
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Unread 11-27-2013, 11:05 PM   #9
dailyyj
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what year blazer core did ya get and did it fit without modifying
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Unread 11-28-2013, 12:03 AM   #10
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Quote:
Originally Posted by dailyyj
what year blazer core did ya get and did it fit without modifying
I used a Yj heatercore and a blazer blower motor. There is a writeup on here just look for blazer blower motor
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Unread 11-28-2013, 12:58 AM   #11
ChicagoYJ
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Quote:
Originally Posted by dailyyj
what year blazer core did ya get and did it fit without modifying
It's not the blazer core that gets used it's the blazer blower motor that you need. It's part # PM102. You'll have to enlarge the hole where the motor it self sticks out of the tub. It's a great upgrade. The write-up should be in the FAQ's section.

If you have a 95 I believe you already have the bigger blower motor installed. If memory serves me right that's when Jeep switched to the bigger blower motor.
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Unread 12-01-2013, 12:13 AM   #12
dailyyj
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thanks yeah sorry meant to say fan not core brain fart
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Unread 12-02-2013, 04:41 PM   #13
33chief
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Ok. So today I replaced my heater core. Bought a core at the local auto parts store and paid just over $30.00 after a 40% discount.
I took off my battery tray and went to work.
It took me a little over 2 1/2 hours to remove everything and install the new heater core and reinstall the assembly. I realized that I wasn't getting "hot" air through the ducts. That's when I looked and must have broken one of the clips that controls the blend gate because the temp select lever wasn't working.
I disconnected the cable that works the temp slide so now I just have to manually control the blend gate by reaching under the dash....no biggie!
But I have heat now and I am thrilled!
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Unread 12-02-2013, 04:53 PM   #14
Rproject
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Quote:
Originally Posted by 33chief View Post
That's when I looked and must have broken one of the clips that controls the blend gate because the temp select lever wasn't working.
I disconnected the cable that works the temp slide so now I just have to manually control the blend gate by reaching under the dash....no biggie!
But I have heat now and I am thrilled!
Mine did the same thing on a recent trip. It's on my short list of repairs. In the meantime I also reach under and switch it from heat to defrost and back again as needed.
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Unread 12-02-2013, 07:22 PM   #15
jay-h
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Quote:
Originally Posted by 33chief View Post
Ok. So today I replaced my heater core. Bought a core at the local auto parts store and paid just over $30.00 after a 40% discount.
I took off my battery tray and went to work.
It took me a little over 2 1/2 hours to remove everything and install the new heater core and reinstall the assembly. I realized that I wasn't getting "hot" air through the ducts. That's when I looked and must have broken one of the clips that controls the blend gate because the temp select lever wasn't working.
I disconnected the cable that works the temp slide so now I just have to manually control the blend gate by reaching under the dash....no biggie!
But I have heat now and I am thrilled!
The YJ heater core is far easier to replace than most vehicles. Mine took about the same time without rushing. For S&G compare the ZJ: Haynes suggests this is not a project for the home mechanic as it involves removing the entire dashboard....
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