Radiator Cap Pressure Problem? Here's the Expert's Fix

You can try pushing down hard on the cap and turning it by hand to see if it will release and if not then try the channel locks while pressing ... A broken radiator cap can decrease the pressure in the coolant system, leading to some of the coolant becoming vapour and causing seals, gaskets, hoses and ... If desperate, drill the cap for zero pressure. Route the overflow into a 2 liter jug for catch. Drive conservatively. Your coolant must be mixed ... I had the same problem as you described.Found that the distance from cap to the sealing rubber ( at end of cap ) wasn't as long as it should ... Check the spring on the radiator cap for rust. Replace the radiator cap if the spring is rusted or compresses with difficulty. Pressure test the radiator cap to ... Remove bleed screw and expansion tank cap, add coolant EXTREMELY SLOWLY to block through upper radiator hose until full, then flip hose around ... It means your system is fully sealed and not leaking anywhere. I'd pop the cap however and make sure your radiator is filled right to the bottom ... With any automotive cooling system, if the system is not leaking anywhere and it's not building pressure, the only thing which could be ... After the engine has fully warmed up, the coolant has expanded and raised the pressure in the closed system. Loosen the exp tank cap slowly ( ... Make sure the face where the gasket goes is smooth(mite need to light sandngi)Then I'd use a pressure test cap and get it up to pressure,then ...