I'm putting this here because it's probably going to take one of you history buffs to figure this out.

I'm looking for the right cooling tube for the HVAC blower motor on a non-AC car. I found two blower cases at the GM parts wiki site (AC and non-AC) but only 1 cooling tube. I see what the parts catalog is telling me but it seems impossible to believe.

http://www.gmpartswiki.com/getpage?pageid=38154

When I mount the blower motor to the non-AC case the tube is at the 12:00 position with no chance of reaching the inlet port on the case. Doesn't matter if I use an AC motor or non-AC motor, result is the asme.

What's the deal with that? Is there really just one style of tube or does the non-AC car have a different tube? And if so, where in the world can I find one?

 

Wait a minute.... I have another non-AC case that I myself picked from a '85 Camaro and that blower motor doesn't have provision for a cooling tube and the inlet port on the case has a plug in it.

But my other non-AC case and motor does have provision for a cooling tube. Is it possible this case came from a different vehicle like an S10 or something?

 

Sounds like you have something else other than a thirdgen box. All the pictures i have seen show a cooling tube. The A/C blower mounts differently and locates the tube at 12o-clock on the non A/C box so that sounds normal for that.

 

I guess I can drill a new hole in the motor housing to reorient the vent tube to where it needs to be.

 

I would just run it without the cooling tube-non AC blower motor should not need much cooling

 

I'm using the AC motor and resistor card so that the wiring is 100% plug 'n play, integrates perfectly with the head unit controls, and is reversible back to AC.

 

So you need a tube from a non-a/c car is what you're saying?

Dig up the Firebird P&I PDF. Look in the parts half of the book, rather than the illustration part. That's where the minor variations will be listed. If need be, find the tube in the illustrations manual, note the group number, then look up that group number in the parts book. If there's more than one tube, you should see it listed there.

 

Hopefully you followed the exercise I tried to explain in my previous post... Build a man a fire, and he'll be warm for a night. Set a man on fire, he'll be warm for the rest of his life. Or something... I won't always be around to look this stuff up for you guys.

So there you have it. There are two different cooling tubes. The reason the book doesn't seem to show the second is because the illustrations manual is mostly just to help visualize the part. The group number(s), highlighted below, tell you were to look in the part number book for variations of the part.



The illustration doesn't differentiate because that's not what it's there for.

Now the other problem that you might run into, is that since you're trying to blend the A/C and non-A/C systems, you may find that the A/C blower motor has the port for the hose in a different location relative to the Non-A/C blower motor. You might be further ahead to look at a later non-a/c blower motor. I want to say that the early motors have different wiring than the later motors, but that could just be the lead paint and alzheimers catching up to me.

 

Thanks, Drew (yet again). Yep, I've been digging through the parts book for about an hour but not nearly as quick at it as you are.


Exactly. Trying to avoid cutting and hacking on the harness. I have 2 non-AC blower motors and both use single-pin terminals at both B+ and ground. I'll look for a later motor to see if it uses the same connector as my '89 AC motor.

Ya, I've concluded the hose port is clocked different. I have 4 or 5 AC motors so might try an experiment with one.

 

I pulled up a 92 a/c and non-a/c blower on rockauto, then rotated the images to match. The non-a/c has the two separate terminals, vs the combined connector on the A/C version, but they look to share the same bolt pattern. Also noted that RA lists at least one non-vented motor. You may be able to run a non-vented motor from an A/C car. Other thought that comes to mind is to build an adapter harness.

 

I trial fit the non-AC box to the firewall and it leaves one of the large lower screw holes exposed n the firewall. What the heck?!?!

 

that's normal. A/C cars used extra bolts.

 

Alright, if it's normal then I guess I'll have to find a plug.

 

I saw this in the salvage yard this morning. It was equipped with an A/C dash, A/C control panel, and an A/C delete pulley. The vin tag matches the spid.

 

Oh, interesting. You have a non-AC motor with a hole and the hole is plugged.

I have yet to find a non-AC tube so I'm starting to think there never was one and that I'm on my own to adapt the AC motor to the non-AC housing. I went to a couple stores today and couldn't cobble anything together yet.

 

Crazy, I googled the part number from the book - 3037062 and one of the first results is this thread - https://www.thirdgen.org/forums/cool...-hose-non.html

Check out the compatibility list for all the cars/trucks that used the same part. Print list and hit you local pick n pull.

 

That tube isn't going to work. And it wouldn't work with any of my non-AC motors either.

 

Why not? It's a non-a/c tube.

3035684 A/C
3037062 non-A/C

At least for 92. It's possible other years are different, it's been a couple weeks since I studied the chart on 8.857.