how is everyone bleeding their cooling system?

[diesekte]

Any tips/tricks, or are we still doing the "fill from the overflow tank, jack the car up, rev it and hope for the best" as in the M/S50/2 swaps? What is everyone doing to know they are 100% getting all of the air out without any trapped pockets?
I'm using a mishimoto E36 rad btw, and I've got a custom aluminum overflow tank as well.

[Loupoz]

Vacuum filler is the way to go when you have an E30, makes it a breeze

[rjmcdermott81]

Honestly, with my s52 I had a really hard time, bleeding it over and over again. With my s54 I didn't have to do it at all, I just filled it up and went. I have a mishimoto and an early model coolant reservoir up in the battery tray.

[diesekte]

Yeah I just fill and go as well, but I want to be absolutely sure. I don't have nor am I looking to buy an air compressor so... :/

[Das Delfin]

The gist of it is pour coolant in slowly (don't let air bubbles form), turn the heater on full blast, crack the bleed screw once the lower rad hose gets hot, turn the car off, top off with coolant after its cooled for a bit. I've done this on m20, m54, and s50. The 24v cars had e36/e46 style radiators with build in reservoirs and bleed valves

[diesekte]

I don't have a bleed valve unfortunately

[Das Delfin]

that is going to make this complicated. Undo your reservoir cap carefully to release air once the motor has reached temp