[Nickshu]

Originally Posted by JFP in PA

Really? We have repaired the aftermath of your "no problem" procedure more than once; average bill: around $2K. When Duncan posted this method, not everyone read the small print and promptly jacked up the air pressure.

Oh, and air pressure does not get everything out, at best you are going to recover around 85-90% of the coolant as it tends to lay in low spots allowing the air to go by. If you want 100% drainage, you will need to disassemble the car, or flush it a couple of times with clear water before refilling it with coolant mix.

You are correct thus procedure does not remove 100% of the coolant. I have disconnected the bottom radiator hoses after draining this way and found about another 1/2-1 quart of coolant still present in the radiators. I'm sure there is a small amount elsewhere still remaining.

What damage have you seen from draining using high pressure? Bent radiator internals? If so do you believe the same could happen by doing the opposite with negative pressure filling system with an Airlift device?

I'm interpreting your above comments to mean that the procedure is not harmful if regulated pressure of under 10 psi is used. Damage comes from use of higher air pressure in your opinion.

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