Posted 6/10/2014 07:08 (#3911082 - in reply to #3910910) Subject: RE: coolant wont suck back into rad on C15 cat engine
SouthCentral WI
As 4wd said, I would look at the UPPER gasket on the radiator cap and its mating surface. The upper gasket makes the system closed to the overflow tank. If this doesn't seal then it will suck air into the rad when it cools.
Towman
coolant wont suck back into rad on C15 cat engine
