Coolant Recovery on a 72 Demon 340 Questions.

correct cap and a vented bottle with 2 pipes short pipe (short stub under bottle cap) to vent and long from filler spout to bottom of bottle, to do the sucking back in

the correct cap doesn't seal all the time it vents at cap pressure sending collant to bottle rathr hen the pavement and it vents when under a certain vacuum to allow bottle content suck back into radiator.

can't remeber proper name for the system but mopars after 73 could be equipped with them.


different from the remote plastic preasurised header tank set up used on modern cars