Recommended replacement heater core?

loc182

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I will be replacing my heater core next month and was curious if anyone had recommendations for a replacement?

I was hoping to buy the OSC model 98712 back in February, as it seemed the best from the research I had done.
(I ordered the "last one" from Rock Auto and what they sent me was not the OSC model. The whole deal cost me $20 in shipping to get nothing at all...)
I also tried to contact OSC several times, but never received a response.

Any advice is appreciated! (And if you have a new OSC 98712 for sale please PM!)
 
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loc182

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Wow, this is great! I swear I hit this site when searching back in Feb and it was yet another not available, but maybe I missed it.

At any rate, thanks so much for the Intel plaaya69! Part ordered! (Total for my area came to $75 with shipping and tax.)
 

plaaya69

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No problem. I might order one for a spare in the near future. Please share some pictures of the final install with us when you get around to install it :)
 

3p141592654

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Is the Toyota core discontinued? This is a job I hope I never have to do, but I'm going now 29 years on the original .
 

Asterix

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ToyotaPartsDeal.com also says the heater core, 87107-14170, is discontinued.

When I changed mine about a decade ago (because it started leaking badly), I bought one via Rock Auto that was made in Mexico. It was way cheaper than Toyota's.
 

debrucer

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I bought one from Autozone that was made in Mexico. It was so bad that I returned it and had my original core serviced, replaced the o-rings and re-installed. The tubes were over 1/8th inch off at the core, making one of them almost two inches off where it connected. Bending was not an option.
 

loc182

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Order delayed till 7/18 now, I sure hope it actually ships for real.

On the subject, is there a better o-ring to use than the Toyota one when putting the new core in?
 

figgie

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Toyota uses standard o rings.

They are either

Viton
N-butyl rubber
Or some other formulation.

Metric size are most common but might get lucky with imperial.
 

Piratetip

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My guess is that the part you are trying to get will be endlessly back-ordered.
They probably no longer make it anymore.

You should call the company you ordered it from to contact the manufacturer.
Find out if they are actually making it / delivering that part anymore.

Might save you some headache later.
 
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loc182

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The email said that it was being manufactured, but if there are more delays I will have to get in touch with CarID. Here's hoping that OSC is really making it, when I tried to contact them in the past I never got a response.

Truth be told I am secretly a bit happy, as I am not looking forward to that dash dismantling. Though I guess it is going to have to happen eventually :)
 

debrucer

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Sadly CarID says "it will be another month" every month on the OSC. Now that it has been about 6 months I am giving up on them.

Does anyone have any thoughts between the two available on Rock Auto?


Happy to take any other recommendations as well. Thanks!
No on the question. I had ordered one from AutoZone and it was made in Mexico. It was physically malformed and being just 1/8 inch off were the tube came out, by the time you were bolted in the connections were two or three inches off. I returned it and had my original professionally cleaned and pressure tested, and they supplied the new o-rings.
 
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kmtsd

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I ordered my replacement one off of RockAuto. Was here within a week, and haven't had any problems with it. I believe I ordered the Spectra.
 
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SupraSpooler

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My dash is out right now. Should I go ahead and just do this preemptively?
 

plaaya69

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My dash is out right now. Should I go ahead and just do this preemptively?
Personally I would just leave it alone and make sure to run Toyota red coolant with the proper distilled water mix but if the Supra has very high miles might that change my opinion. Just my 2 cents.
 
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loc182

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Thanks everyone, it will be nice to be able to turn the heat on again!

I am really curious to see where all the coolant I was losing when I used the heat was ending up. Never saw any drips, but the birdcage would happen in the turns after about a week of topping off. (Now that the heat is fully off coolant bottle stays constant.)
 
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Asterix

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I just dug through my old emails and found what I bought early 2010: PROLIANCE 398296. It's been fine since then (knock on wood).
 

kmtsd

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Personally I would just leave it alone and make sure to run Toyota red coolant with the proper distilled water mix but if the Supra has very high miles might that change my opinion. Just my 2 cents.
I take the opposite stance. If you're dash is already out, might as well do it. It's not too expensive.
 

loc182

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I received the Spectra heater core and it looks to be very well manufactured. So I am feeling a little better about things. Will be curious to see how things go next weekend when I get to work.
 

shipkiller

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I received the Spectra heater core and it looks to be very well manufactured. So I am feeling a little better about things. Will be curious to see how things go next weekend when I get to work.
The spectra core I received looked like a 20years old used unit...
 
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loc182

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The spectra core I received looked like a 20years old used unit...
Funny you should say that, I felt the exact same way when Rock Auto sent me that "OSC" heater core back in February. (Which I sent back.)

Here is the pic of the new one I just got, hopefully it doesn't look too bad:
Heater Core copy.jpg

UPDATE: This thing is no good. The diameter of the piping is too small for stock Toyota pipes and the nozzle on the right is bent up, but it should be going down ever so slightly. Do not buy!
 
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A70nut

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I notice nobody has mentioned this yet in this thread, but when I replaced mine it destroyed the metal clips holding the inlet and outlet pipes to the core, since they arent available anymore I chose to have a local radiator shop braze the tubes to the heater core, allowing for a solid leak free connection that fits just like stock.
 

loc182

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So I have begun and I am at the point where I should pull the core. But I cannot find any guidance in the TSRM and am not sure what to do next.

I have found lots of old links to instructions, but they are all dead...

I found the AC system info, but from looking Supra mn's pics it looks like the whole unit heating unit should come out without the need to pull the AC components.

Thanks for any advice!
 
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loc182

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So I found this after many searches led to dead links:

Remove Heater Core Box​
1. Undo heater hose under hood by heater VSV.​
2. Undo heater hose under hood by the brake booster.​
3. Undo 3 connectors on left of heater box.​
4. Unclip floor heater ducts.​
5. Remove 4 10mm nuts at the corners of the heater box.​
6. Remove 2 10mm bolts/screws holding the heater box to the a/c box.​
7. Remove 2 10mm nuts on top of a/c box.​
8. Remove 10mm nut on bottom center of a/c box (may be under carpet).​
9. Loosen heater box by pulling out on left side first (pull on opening directly on top of the heater box not the ones on the sloped part or the left side as this can break off the plastic tabs).​
10. Remove heater box.​
Anyone have any thoughts on number 4? Does one need to remove the seats and the carpet to get these out of the way?

UPDATE: I was able to pull the floor ducts off the lower vent section of the heater core box. They don't seem to be fastened below the carpet in any way, so they were easy to move.

Thanks!
 
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Asterix

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The heater box definitely comes out without breaking into the A/C, but it needs to be separated from the A/C box. Once the dash is out, the rest is easy. You can leave in the seats and carpet.

As I recall, the floor heater duct sits on top of the transmission hump and points down on both sides. The duct is on top of the carpet.

Just pull gently on and wiggle the heater box to make sure everything is disconnected before removing it.
 

loc182

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So I got the core out and sadly there was nothing wrong with it at all. I have gone off topic, so I will start a new thread for my related questions.

I can say DO NOT buy Spectra Premium 94712 heater core from Rock Auto. It is not made correctly.

The diameter of the piping is too small and the longer tube is bent up rather than down as it should be.

NobuySpectra.jpg

I am a month past my return date at Rock Auto, but they are making an exception. They tell me that of the 41 of these they have sold only 3 people including me have noted the issues with the piping. It makes me wonder if 38 people didn't install?
 
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Piratetip

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Couple quick questions on the Spectra unit.
To piggyback my last post in your other thread.

Question 1
The fitting there that is clocked ~ 35° too high.
Will it physically connect to the vehicle?
Does the o-ring fit and connect as the old one would?

Question 2
That long section, is it soldered/brazed to the end cap?
Or is the tube part of the end cap.

Just curious as the unit could be de-soldered and clocked to the right orientation.
Its a PITA I know to have to do this on a new part.
But if someone has an original heater core that is totally trashed, this unit may actually work.
Work with modifications (maybe), but at least there might be an option.