Over flow bottle

[Chevelle_Nut]

72's do not have overflow bottles, typically the radiator was filled to 3" from the top for expansion room and the radiator cap allowed the radiator to puke the excess amount out onto the ground.

[Highway Star]

How does an overflow bottle recirculate the overflow back into the cooling system? I was thinking about just using a catch can, so that in the event of a boil over or puke episode, that it wouldn't spray all over everything. Right now I just have a length of 1/2" clear tubing with some braided steel over it, and it has made a mess of things. Seems like a JY run might score me some sort of restorable holding vessel. Is there any sort of real advantage to having one that can put the fluid back into the radiator?

[Hank70SS]

The tank has a tube that goes to the bottom. When the rad cools, the coolant contracts and creates a vacuum that sucks the overflow coolant back in.

[grumpy]

Originally Posted by Highway Star

How does an overflow bottle recirculate the overflow back into the cooling system? I was thinking about just using a catch can, so that in the event of a boil over or puke episode, that it wouldn't spray all over everything. Right now I just have a length of 1/2" clear tubing with some braided steel over it, and it has made a mess of things. Seems like a JY run might score me some sort of restorable holding vessel. Is there any sort of real advantage to having one that can put the fluid back into the radiator?

Again, I'm just quoting what someone else wrote on another site, but its my understanding that using a recovery tank raises the boiling temp on the coolant. If so then that alone is worth a shot.