[520SC]

You need to install a pressurized coolant overflow tank above the level of the radiator. The overflow tank should have a 16 psi radiator cap.The cap at the top of your radiator must be drilled to allow unrestricted flow to the overflow tank. Your radiator discharge line should be routed to the bottom of the overflow tank. Once you set it up, your overflow tank will be the high point of the coolant system.