Excellent images. Hope you don't mind - here they are combined as a continuous PDF. No password, just download (ignore the hype and click "free download") and unzip:
https://rapidshare.com/#!download|334p6|219952106|HVAC air handling - both sides.rar|11341|0|0
Thanks.
What cha doing with it while it's out hambone?
IF I recall, he's fixing the seal where the boxes meet on the firewall. I think he said he had a bad air leak.
What I discovered was the seal at the firewall opening is gone and the back cover was half open and missing screws so it was blowing out of there too. I also adjusted the door on the flapper for the floor/defrost. There are 2 holes in the linkage to adjust to your preference. So you can choose full blast defrost or a slight blend in defrost/heat outlet. I went for the full blast defrost and it made a huge difference. I will be doing write ups on this for the interior section.
What made this easy for me was the PO already hacked off 3 of the bolts. Only one holding this in right now is the top one. Once you get past removing those four bolts it's a breeze. It's a little tight trying to maneuver the unit out of the dash but it can be done.
I still have to take this back out after I find some of that thick foam weather strip stuff from Home Depot to put around that hole in the firewall to seal it up right, or maybe an original seal from LMC truck if they offer it. Let me tell you just the work I did so far made an amazing difference. I never felt thing put out heat like it does now. So happy I did this, and know it will only get better once it it all complete.
I am having an issue still with the defroster housing not matching the heater housing outlet, still is a gap there I need to seal. Also the left side defrost blows out much harder than the pass side which has me scratching my head. I plan to get that fixed up too and also and contemplating a mod for the side window defrost on the ends of the dash. Maybe Retro can dig me up a set of those side dash vents off a later model vehicle and I can integrate that.
Also in the works is to tap into the lower floor heat vent and pipe it under the bench seat to the second row floor.
ANNNNNDDDD...... last but not least, I now have a big hole where the a/c vent housing used to connect to so I will either seal that off or also think of a mod for that vent as well. I was already contemplating doing away with the glove box that I never use and install a custom vent there and have kind of a "Max" flow "quick heat up" outlet there, OR....use that outlet and plumb that one to the rear seating area. Decisions, decisions....
I've been driving the K1500 the last 2 days with the hear core hooked up but laying on the fender well. Good news, is no leaks. Bad news is, it's not installed. I'm having a hell of a time getting air exchanger removed. Can't get to the lower nuts in the engine compartment, and the top stud is spinning. Of course I don't have any help to hold the stud with some vise grips on the other side if that would even work. This isn't going to be fun. I"m thinking of drilling access holes in the inner fender well to get to the lower bolts.
