'81 H36C coolant volume

[tmjb]

Does anyone know the approximate total volume of coolant for my '81 H36C with 2QM20 and water heater?

I drained and flushed the system and now need to fill with fresh coolant. I am unsure whether or not I have fully drained the system and would like to be sure I have an appropriate concentration when I refill.

Thanks for any advice.

 

[Capt jgw]

There's only a few ounces in the water heater, but the volume of the hoses would add up and that would vary with each installation. If you disconnect both houses from the engine and blow them out, you'll get virtually all the couldn't out and will know you're studying from empty. Burning all the air out of that line can be tricky when you refill though.