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does putting a vacuum on the system get all the oil out? or does it leave some in? if so, where is it? in the compressor? the drier?

The oil is throughout the entire system. A lot of it lives in the compressor, but there's plenty in the condenser, the evaporator, and even the lines, especially where they droop down. The compressor is not like a 4 cycle car engine where there's a sealed and seperate crankcase. It's more like a 2-stroke engine, where everything goes through the crankcase.

You will not get the oil out by vacuum. All that does is pull out everything that boils at low pressures. To get the oil out, you've got to manually remove components and drain them. Tedious, to say the least. But if all you do is the compressor and condenser, you've got most of the oil.

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if I go the long route, I want to make sure I'm putting in the right amount of oil.

I got my oil from the A/C-kits.com listed above in the thread. BVA auto-100 (I went and looked). The quantity of oil in the system isn't hyper sensitive or overly precise. You can find lots of info out there on how much oil you put in, accounting for the various components. I don't remember the quantities, but since the bottles are 8 oz, and I did two vehicles with one bottle, I'd say I used roughly 4 oz per vehicle.

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also, your note about compressor noise -- that's one of the things I noticed when I did this last using the combo cans of oil & refrigerant -- compressor noise. rattley.


It surprised me how much difference the oil change made. I wouldn't have done it except the replacement oil was quite cheap.

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I have a Weber carb, so no dashpot or idle up mechanism except for my foot, which, at stops, I hold it at 1000rpm.

In the junkyards you will find many electrical solenoids and such that can be fitted up quite easily to your Weber. I'd consider it a worthwhile upgrade, but you can do the job with your foot.


'97 T-100 SR5
'86 Toyota's, the variety pack (all gone)