coolant system
Melting Slicks
Joined: Mar 2007
Posts: 2,100
Likes: 12
From: Frederick Maryland
If your radiator has a cap with a tube going to a plastic reservoir you have an open system with an overflow tank. If your radiator has no cap and a tube running to a metal tank with a pressure cap you have a closed system...the tank is an expansion tank not an overflow tank.
Race Director
Joined: Mar 2006
Posts: 14,112
Likes: 28
From: Florida
Almost all cooling systems have been closed since the Model T.
The proper cap for the 75 has a vacuum valve because of the overflow tank.
There are 2 types, a gravity and a spring loaded vacuum valve.
The spring loaded is more reliable.
The proper cap for the 75 has a vacuum valve because of the overflow tank.
There are 2 types, a gravity and a spring loaded vacuum valve.
The spring loaded is more reliable.
Race Director
Joined: Jul 2001
Posts: 15,892
Likes: 42
