So i have this annoying coolant leak coming from under the radiator cap as the engine heats up. It doesn't over heat at all though. It's almost like there's too much pressure and it kind of mists from under the cap and runs down to the ground. I've tried 3 different radiator caps. Blew air through the overflow hose to make sure it was not obstructed. I put in a new thermostat and still the problem persists. There does not appear to be any cracks in the radiator where the cap secures. Any ideas? I'd hate to replace the pump or and radiator and that not solve the issue.
thanks.

 

Welcome to DF
Have you try to clean the surface area on the radiator? Try adding some coolant dye and drive. Check with a black lite and see where the leak is coming from. The cooling system colud be building too much pressure.