Weld bung for new Degas Style coolant cap?

[Revved]

I finally got around to measuring a factory coolant bottle with that fitting... its a 2" diameter with a 10 pitch outside thread. Im going to go back through Gregs link but I don't think I've seen anything fitting that. I should search on a diesel forum since they seem to like their billet degas tanks... but most of them I've seen have switched over to a standard rad cap.


I just called Moroso because they had a Mustang coolant tank with the bung. They sold me 2 for $10 each. I'll have them in a couple days.

[Vince@Meanstreets]

Originally Posted by Revved

I just called Moroso because they had a Mustang coolant tank with the bung. They sold me 2 for $10 each. I'll have them in a couple days.

GTFO really? Thats cheaper than the bung..... whats the part number on that tank?

[GregWeld]

Originally Posted by Revved

I just called Moroso because they had a Mustang coolant tank with the bung. They sold me 2 for $10 each. I'll have them in a couple days.

Hysterical!! Go figure.

[Revved]

LMFAO!!! No.. the bungs were $10 each... not the tank!!!

[dontlifttoshift]

Sean, I'm curious now.

Are you replicating an existing tank? How did you math your way into sizing the tank? I have to admit, this seems like a better way of doing things and solves a couple of other issues as well. I also like that the cap is a 21 lb.

I tried to see inside the tank on the new mustang but I can't determine what is in there but would love to see what you have planned. Thinking about buying the moroso tank just to see.

[dontlifttoshift]

Found some interesting info in this article regarding tank sizing.

https://www.cumminspower.com/www/lit...30_p93-115.pdf

We all know coolant expands when it warms up but an actual number wasn't readily available....at least to me. It seems that 6-7% of system volume is generally accepted as volume required for expansion. That is for an overflow tank or a degas tank.

A degas tank should have a volume of 17% of the total system. 6% for the above mentioned expansion and 11% for coolant. They call it draw down capacity on page 95.

So lets assume 4 gallons of coolant in the system, not counting the tank. 17% of that is 2.7 qts, I like round numbers so 3 qts it is. 3 qts is approximately 175 cubic inches and that would be the proper size for a degas bottle/surge tank.

Right?.....

[andrewb70]

I would check with C&R...

Andrew