Say Goodbye to Pressureless Radiators Fixing Radiator Caps Like a Pro

If the cap is faulty, it won't be able to release the right amount of pressure, so the reservoir will begin to overflow. There is no valve in the radiator cap that permits only gases or vapors to pass and not liquids. If the cap is not sealing, there is a pathway ... If the cap is stuck, it will cause a collapsed hose when cool. If any doubt replace the cap. I don't think you have a head gasket problem. The ... If it's not overheating then you should be good. I've noticed that my upper coolant hose is not rigid when the engine is not running. Just keep ... Grab your upper coolant line cold and see if its holding pressure or just pushing fluid/air around. Next drive your car till at operating temp, ... My radiator cap is original, have had no problem in 3 years, WITH coolant. ... Changing the radiator cap won't make a bit of difference. Either ... Header tank cap or radiator cap is faulty ... The car coolant header tank is equipped with a pressure release valve in the filler cap, intended to release coolant ... The cap should vent at 16psi. When it's cold there shouldn't be any pressure under there as it should be linked to your overflow bottle to vent excess pressure ... To make a no-pressure cap, you want to remove the inner seal, and fully tighten the cap so the outer seal keeps the coolant in the radiator and the overflow ... 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 ( ...