I believe GM may have used PAG150 at one point but reverted to PAG46 later OR a universal PAG for GM which may be PAG100 but I cannot get any solid info. I don't want to destroy my new ACDELCO V7 compressor w/ the wrong viscosity oil. Dave Dave - I definitely understand what you say about conflicti...

You can add the oil anywhere, it will distribute itself once in operation. If you pour into the compressor directly, be sure to rotate the compressor (inside nut or bolt of the compressor clutch assembly) at least 10 full revolutions before you start the evacuation and charge steps. Also a good time...

2012 Mustang base 3.7L V-6 convertible. Retrofitted Ford heater/evap core with 4Seasons evap core that I assume ships without any oil inside. I also replaced the accumulator as system has been vented for a while. I could not find much useful guidance on adding oil for Mustang component replacement ...

Are you saying that all the contamination is at last contained inside the dryer? In other words I don't need to worry about the expansion valve or evaporator needing replacement? I believe most driers have a screen that would trap particles. I didn't touch the expansion valve or evaporator when I r...

days before it quit I could hear a metallic crushing noise associated with the a/c been turned on, and would go away when turn off (meanwhile the a/c was still blowing cold). Yes, that sounds like a bad compressor to me (do not run it further). I'd disconnect the compressor wire if you decide to wa...

Clifs80truck wrote:cross contamination from different refrigerants is why, and the fitting sizes / orifice tubes may be differant

Agree in your case, fittings and potential refrigeration oil residue.

Clifs80truck wrote:I would really like the evaporator core to be close to identical to the original, so it fits properly in the firewall housing.
Clif
cb@nitrobull.ca

I don't see why you think that a new evaporator would be needed.

My thinking the only oil in the system is what was in the old compressor and the <8oz. That I put in. So drain the old compressor, take note of the volume and replace that amount back in the new compressor. If you really need a compressor, above should get you close, that's what most techs would do...

A real AC shop, and many machine shops, can make new hoses for you that fit. Some will re-use your end fittings.

The compressor only "robs" hp from the engine when engaged. When not engaged, the pulley rotates freely. Or just remove the belt from old York compressor. You can likely heat and bend the gearshift lever so your hand doesn't hit. I bent mine on my 1979 Toyota truck so my youngest could sit...