Coolant complete drain

[Ryunker]

Is there a way to drain all of the coolant from my (fater in laws) '67 Avanti II w/327? I know on all my ford stuff there are drain plugs in the side of the block to get out the last 7 quarts or so. Is it the same on the GM?

Any ideas please let me know.

Rich Yunker

[BobS]

Yes, There is one on each side about mid block just above the oil pan. 1/4" pipe thread if I remember correctly

[Ryunker]

Yes, There is one on each side about mid block just above the oil pan. 1/4" pipe thread if I remember correctly

Thanks, I figured there was. Do you have any idea what the coolant capacity would be?

[BobS]

I'm gonna guess that each install is somewhat different but to fill my 83 Avanti with 355 SBC, New high capacity aluminum radiator and heater took about 2.5 gallons of antifreeze. When mixed 50/50 it adds up to 4.5 to 5 gallons total capacity.

Bob

[Gunslinger]

If you want to be sure the mix is right, get the pre-mixed coolant...already 50-50% right from the jug. A bit more expensive but also not with tap water with minerals and other chemicals not good for a radiator and cast iron engine.