Suburban AC install and upgrade

[swissarmychainsaw]

Hey Gang,
1976 GMC Suburban
2008 LS 6.0 with Carb and MSD
TH350 203 transfer case
Blue and Silver!

This truck is a factory air truck, no rear air, but when the LS was installed by the PO all the AC stuff was removed.

I have taken a vow to get AC working again on this thing AND to install a rear AC unit on it.!

I source a rear unit, and (eventually) did the right thing and called "Classic Auto Air" for guidance on the compressor size and other things.  Mike O there put a kit together for me and I'm installing it now.

My question is this: How do you mount a parallel flow condenser?  the brackets I got seem not very helpful.

Kinda like this:


Before I started this project I knew nothing about Air Conditioning, but I'm getting there

thanks!
Nick

[Da67goatman]

Sorry I can't help, I don't know jack about A/C but I do really want to see the finished product after you get it all together

[bd]

The condenser installs in front of the radiator similar to the factory configuration.  However, you may need to fabricate custom mounts to ensure easy accessibility for attaching and/or servicing the lines and to guarantee suitable clearance with the radiator. 

Link:  Serpentine conversion A/C question

[swissarmychainsaw]

I'm doing a full court press on this system.

Here is the mount for the condenser.





I have all the lines fabbed up and am trying to get everything to seal tight.

Next is the wiring, which is ... troublesome.

[swissarmychainsaw]

I need to add about 3 oz of PAG oil to this system.

I arrived at that number by looking at the manual and talking to the sales/tech, the original system (with dual AC!) had 3 oz more then the since evap system.

So assuming the compressor has enough oil in it for a single AC system, we then will add 3 oz for a dual.

How should I add the oil?

I need to pull a vacuum on it anyway, so it's open, now.

I'm seriously considering opening one of the rear lines and just pouring 3 oz in.
Considering the rear lines are 15 feet long, I don't think it should be a problem.

[bd]

Does the system already contain PAG oil?  DO NOT MIX different types of refrigerant oil!

As long as the existing oil is PAG just dump it into the accumulator.