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Putting the AC compressor back on

2.7K views 6 replies 5 participants last post by  Gohot  
#1 ·
Sure seems like I'm doing it backwards with Fall and Winter coming up next. I did like a lot of people did with my RC, I got a good motor to replace a toasted one and then decided to go without the AC. I'm not saying everyone does this, but you can find a few who have. And by the way, if you did, that belt from the crank to the water pump and to the alternator is 42 3/4" long (believe me, it took a lot of trys to get the right length)
So anyway, now you have decided to put it back stock as far as the AC, and you have a manifold that will work. It must have the water/coolant snout on the drivers side, off of center, like an Edelbrock Performer (or stock two barrel manifold and carb)
In a nutshell thats the reason I used the Eddy Performer with a 4 bbl, for hp and because it was the only one that would fit barring using the older (V shaped) compressors from the 60's and early 70's.

Were talking two combo's here that will work:
The later compressor with an Edelbrock Performer or.....

The earlier compressor with nearly any aftermarket intake manifold...

OK, having sorted out the Compressor and Manifold your going to use..... most of you have that compressor laying around, and most will (hopefully) have duct tape over the two port openings.

Leave it long enough, and it will have gotten moved, then moved again and in the course of storing it, it's likely you will find it in a puddle of oil under it, and corresponding (oh crap !) SO..... now to find out what weight and kind of oil goes in..... then how to pour it in? or rather where...

Well friends, it's time, the weather is not so sweltering being early fall still, and I have the gasket kit..... but ...... now I need that information of where, how much and what kind of oil. Let me clarify, I'm using the Sanderson type compressor (later round non-Asian type compressor) and want to flush if possible and refill the compressor......
Suggestions would be well received right now as I prepare the installation. This is an 84 RC with the 318 motor I might mention, with the usual power components, PB, PS, AC, PW so the only thing that has changed in the engine compartment are the Air Cleaner, carb, manifold, and headers.
 
#3 ·
Flush everything, replace the drier. Turn the compressor ports down and turn it by hand and get as much oil out as possible. Evacuate the system for at least 30 minutes. You can buy a pressurized oil charge, or a can/bottle of oil. Add 7-8 ounces. PAG works with R12 compressors converted to 134a, get ISO 150 weight oil. If you get the can/bottle, simply stick the charge hose in the can and let the vacuum pull the oil in. Pressurized cans use a regular screw on tap.

Oils used with R12 don't mix with PAG, they settle out in low areas and just take up space, as does too much PAG. Best thing to do is get rid of as much old oil as possible, mineral or PAG either.

Before you get too carried away, I'd recommend changing the condenser to a double pass style if you haven't already. The original single pass can make high side pressure run in the 300-375 psi range on hot days [95+]and the A/C won't cool worth beans at idle or running around town, even with all radiator seals in place and a 7 blade fan w/shroud.

With 134a, the more condenser you have the merrier. Been there.
 
owns 1986 Dodge Ramcharger
#4 ·
inzane said:
Flush everything, replace the drier. Turn the compressor ports down and turn it by hand and get as much oil out as possible. Evacuate the system for at least 30 minutes. You can buy a pressurized oil charge, or a can/bottle of oil. Add 7-8 ounces. PAG works with R12 compressors converted to 134a, get ISO 150 weight oil. If you get the can/bottle, simply stick the charge hose in the can and let the vacuum pull the oil in. Pressurized cans use a regular screw on tap.

Oils used with R12 don't mix with PAG, they settle out in low areas and just take up space, as does too much PAG. Best thing to do is get rid of as much old oil as possible, mineral or PAG either.

Before you get too carried away, I'd recommend changing the condenser to a double pass style if you haven't already. The original single pass can make high side pressure run in the 300-375 psi range on hot days [95+]and the A/C won't cool worth beans at idle or running around town, even with all radiator seals in place and a 7 blade fan w/shroud.

With 134a, the more condenser you have the merrier. Been there.
Good info. {cool}