Hot Rods Another one of those I should know the answer questions about cooling systems…

How much coolant do you put in the puke can? My old plastic wrecking yard special just had to go, but it had a mark on it “fill to here”, but the new fancy 3x13 aluminum one…..? Any info greatly appreciated.

 

I simply fill my radiator to the brim
when the engine heats up it fills the overflow bottle
when the engine cools down it magically goes back into the radiator

 

I never put anything in the overflow

 

I usually put enough coolant in the bottle to make sure the end of the hose stays submerged in coolant. I dont want it to suck air back into the radiator.

 

Make sure to have the correct style cap for a recovery system, They are different than a standard pressure cap.

 

The difference is that the outer seal on the cap is rubber, instead of metal. But I dare you to find an old style non-recovery cap today, they've been out of production for a long time as far as I know.