Coolant Recovery issues

[68gmsee]

From this site: http://www.carcraft.com/techarticles...e/viewall.html

........Look for two rubber sealing gaskets on the nonvented cap. The normal seal on the very bottom is what seals the radiator pressure and is relieved only when the pressure exceeds the rating on the cap. The second seal will be located directly underneath the cap and is designed to seal the cap for use with overflow systems. The vented cap probably does not have this second seal under the cap and allows overflow out the tube where it is dumped on the ground.