Not the only way at all. I've got a vacuum device that draws a vacuum on the cooling system, once you reach 25" of vacuum or so, you place a hose in your 50/50 mix coolant, open the valve and coolant fills the void. No air, no air lock. Fire it up, wait for the thermostat to open, drive away.
It's quickest, easiest and what is done at the factory.
__________________
2001 HO Cummins powered Dodge 2500
2014 Sierra 346RETS
Nights camped in 2014-28
|