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Old 04-07-2017, 08:59 AM   #7
Gelbster
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Join Date: May 2014
Location: S.California
Posts: 2,027
The problem for some who use these systems is getting a compressor with sufficient flow volume and pressure to produce the specified inches of vacuum. The AirLift video linked below muddles vacuum and pressure. It specifies "25 psi".
We have discussed this previously and it seems the Airlift(& clones) work well enough at 15 "psi" - no need for the "25 PSI" specified in the Instructions. What it doesn't make clear is how to allow a marginal compressor to recover but avoid loosing the vacuum in the cooling system. Depending on how much coolant is in the system when the vacuum drops too far - you may have to drain and start over. Same for running out of coolant in the refill bucket.
I found that 15 is sufficient to collapse the large hoses from the water pump .That seems more than sufficient IF you keep the refill bucket full and don't fall below 8-10.YEMV.
It is a very noisy job unless you have a remote Compressor.
Rear-End-Up-Burping seems to work eventually as Mr.Q. says.
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