Pulling the heater core

**Crawdaddy** · 12-07-2008, 06:24 PM

Well, my heater core's leaking. I have been trying to get the old one out today, with not much luck. I got to the box that the core's contained in, but I can't figure out how to get the box out to get the core out. I don't see any bolts to pull and in the engine compartment I can't see anything or any way to get it out. Any help is greatly appreciated

**dwill3015** · 12-07-2008, 06:45 PM

Try that repair manual thread I started. It ususally gives you a walk-through and photos/diagrams to follow.

**ct9a** · 12-07-2008, 07:12 PM

Good luck with the repair. If you get a chance, would you mind taking some pics for those of us who might have to do this someday too?

**Crawdaddy** · 12-07-2008, 08:50 PM

Originally Posted by dwill3015

Try that repair manual thread I started. It ususally gives you a walk-through and photos/diagrams to follow.

Unfortunatley, they don't provide useful pictures. I can't find the mysterious bolts/nuts that everything is talking about...

**ct9a** · 12-08-2008, 12:17 AM

Do the bolts/nuts go through the firewall and have to be disconnected inside the engine bay?

**JMoney02** · 12-08-2008, 04:21 AM

I believe they are in the engine bay, I also thought that they clipped to the inner firewall? Need to be at home to look it up as I can't remember, at work right now and won't be home until 9:00am, stay tuned.

Jeff

**Crawdaddy** · 12-08-2008, 08:52 AM

I'd agree that they have to be in the engine bay. However, I can't really see where they'd be, and attempts to feel for them so far has not resulted in anything. I gave up yesterday when it started getting dark, but I'm going to give it another crack today after I get off of work. Jmoney, if you can get a camera in the area where the bolts are, I'd be most appreciative. I so want to get this done.

**JMoney02** · 12-08-2008, 02:11 PM

Originally Posted by Crawdaddy

I'd agree that they have to be in the engine bay. However, I can't really see where they'd be, and attempts to feel for them so far has not resulted in anything. I gave up yesterday when it started getting dark, but I'm going to give it another crack today after I get off of work. Jmoney, if you can get a camera in the area where the bolts are, I'd be most appreciative. I so want to get this done.

We are talking about doing the the Heatcore on the 1991 Suburban right? I just want ot clarify from
your post and the Bur you have listed? Bear with me on the Pixs, just learning more about the post area that the site has shown how and where, you know us old guys with all this Technology..

Jeff

**Kamd91GMC** · 12-08-2008, 02:42 PM

the bolts are located on the firewall underneath/behind your A/C Condensor Can. you have to remove your resivour tank and there is 2. and then i think 1 more behind and down from the A/C Condensor

**Big6ft6** · 12-10-2008, 03:21 PM

Craw..not quite clear on the question about getthing the "box out" that heater core is contained in..but usually the heater core cover is removed from inside the engine bay..there are small nuts on studs that go through the lip of the heater core/air conditioning evaporator cover as KamD says..behind your A/C canister and stuff.

Many times the nuts are small enough to be covered by silicone/calk sealant around the heater core cover, I know on my 89 with A/C it looked like the A/C evaporator and heater core were all behind one big mess of a cover.

but definitly comes out through engine bay...99% sure.