I want buy an oil/dye injector for automotive AC use. Seems there are
two types. One you use in conjuction with a vacuum pump, the other
seems to have its own type of pump, where you screw the handle in, and
this forces oil/dye into the system.
Which one do you guys recommend?
This is for Top-Ups and minor AC servicing use.
Vacuum pump? The ones I know of go between the hose and the low (suction)
side of your manifold gauge set. You fill it with oil, screw the lid on,
connect the suction hose, with the center port open crack the low and high
side valves for a second to purge the air out of the center of the manifold
and lines, cap the center port, then open the low and high side valves again
with the system running and let the system's own pressure difference push in
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