Quote:
Originally Posted by Nickshu
Sorry but I disagree. I've done it more than once with no problems. The procedure uses only 8-10psi pressure which is far less than normal operating system pressure. Also my understanding is that the ONLY way to get the coolant out of the heater core is using air pressure, it cannot be drained.
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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.