Unleash Your Vehicle's Cooling Potential Fix a Radiator Cap That's Not Holding Pressure

WHAT CAUSES PRESSURE AND AIR IN THE COOLING SYSTEM AND OVERFLOW TANK ON CHEVROLET CRUZE CHEVY SONIC. Electrical Car Repair LIVE•731K views · 15 ... 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 ... 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 ... 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 ... The rubber just won't hold it anymore. If it's older than 5, grab a tester or replace it. Once they fully loose pressure than you are in real ... I'd try a new cap first. If the pressure goes over 15 pounds it should vent through the side cap, not the top. Replacing a bad radiator cap is a simple process, but the best and safest way to replace or repair it is to head to a professional service center like the one ... The cap is designed that the excess pressure from the radiator is supposed to be bled into the overflow tank. ... won't be long until those OE radiator caps are gone as well. ... When the radiator cap can't hold 18 lbs. of pressure the radiator ... 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 ...