Greetings,
I am in the process of trying drain the coolant from my car. The problem I am having is it only partially drains. I get out a total of a little over a gallon, or nearly 4 litres. I think the total capacity is something like 7 litres. This is from draining the radiator and the back of the engine near the water pump. Now before anyone jumps in with a check list for me, here's my procedure.

Car is on jack stands and level. Engine is cold. Before shutting it down, the heat in the drivers compartment was turned all the way up. First I removed the top from the expansion tank. Then I opened the radiator drain on the driver's side of the radiator, let it drain until it stopped, and then opened the drain on the back of the engine. I've done it three times so far, filling it with distilled water in between iterations. Clear water goes in, green fluid comes out, not just a little green, it almost looks like 50/50 mixture.

Is there some other drain I need to open, or is my radiator likely to be blocked up?

Knowledgeable and helpful responses appreciated,

Many thanks,
-Greg
1998 V70 T5M
150,000 miles.