radiator hose problem ?

[iajjpop]

In my ''T'' I have a 305 chev-vy motor, bored 30 over with a R. V. cam, was overhauled when put together. With a 180 degree thermosat, A Walker V-8 radiator, All work good except when I drive it, sometimes after I shut it off, it sucks the top hose down some, it will also distort the bottom hose .After I start it up it will be O. K. I've heard you can drill a small hole in the thermosat, will this do away with my problem???

 

[Francis Blake]

Do you have a burp tank on your rad?

 

[iajjpop]

Do you have a burp tank on your rad?

 

[iajjpop]

Yes I do.....

 

[RPM]

You have a bad or wrong radiator cap. It is holding a vacuum in the system and it should not do that.

 

[bigfrank330]

Sounds like a bad radiator cap to me

 

[Wild Mango]

Sounds like a bad radiator cap to me

Yep the contraction on cooling should be sucking top up water out of the catch tank but instead its pulling a vacuum in the system. Very bad thing, it can damage the radiator which is made to withstand pressure, not vacuum. Like suck tubes flat and cave in tanks.Seen it happen.

 

[Duke]

I would say it is a bad Rad. Cap or the line going to the burp tank is plugged.

 

[butch27]

Duke: Where in the heck have you been?

 

[Duke]

Hey Butch, I have been around. Been a busy summer and it is still busy. Speed week is coming up soon - you going ?