radiator splashing

[rackops]

One of the things I love about the internet is chances are, if you're asking a question, someone else is wondering the same thing.

My car (31 Victoria) was doing the same thing. When the engine was under load, antifreeze would foam and spew out from the radiator cap. I was troubled by this, particularly since I just replaced the radiator with a brand new Brassworks "extreme touring" one, and while everything was opened up, flushed the cooling system out. (I changed out the cylinder head, water pump and head gasket with a Best brand one last year, so all of those were good to go.)

Anyway, I figured I'd try out changing the cool Motormeter radiator cap with the "stock" Model A one. Kind of boring, but I doubled up the gasket and put it on. It was tight, but that's the key.

Long story short...no issues with foaming. I filled the radiator up with coolant, just above the baffle, and had a couple of drips come out of the drainage tube (as it's supposed to) after driving. Otherwise...it didn't look as cool, but the stock radiator cap with doubled up gaskets worked great.