Proving once again that the simplest solution is often the most elegant.
Thanks Randall, I am going to go check the radiator cap now.
Bob
----- Original Message -----
From: "Randall" <tr3driver@comcast.net>
To: "TR" <triumphs@autox.team.net>
Sent: Sunday, January 23, 2005 7:55 PM
Subject: RE: Two TR3A radiator questions
> > I still don't understand what mechanism causes the cap to allow fluid
back
> > in, though. I can see that the added pressure of the heated coolant will
> > cause the stopper to rise letting the coolant into the overflow tank,
but it
> > seems that as the coolant cools, it would tend to keep the stopper
closed
> > not allowing the fluid to return. Anyone know what magic makes it work?
>
> Generally there is a metal disc in the center of the rubber stopper that
pulls
> downward under vacuum to allow fluid back into the radiator.
>
> Randall
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