Master the Fix Diagnose and Repair a Radiator Cap That's Not Holding Pressure

... Repair: https://goo.gl/XBe4Sh ▻ Missing Wheel Lock: https ... pressure in the coolant system and how to fix it. Pressure build up ... From a cooling perspective it won't make much difference, plus the system only sees boiling temperature* when there is an overheating problem. 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 ... If the system will not hold vaccum then you have a internal seal problem (Headgasket failure). ... The cooling system can still hold pressure. But ... Radiator caps can be checked. Every cooling system pressure tester I know of has an adaptor to check radiator caps. transman. nzinzer_150054 ... With everything going on in the world what is the problem? It's an OPEN cooling system. It's going to suck and pull must I put up a pic of " ... That having been said...just keep the tank full enough to make up for the stem that WILL escape, and do a test when you get the cap to determine ... I read some people use tire pressure valves inserted into old radiator cap and pumped them up with a bicycle tire pump with a pressure meter or ... 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 ... So is this the cause of my overheating problem all this time. I guess every time I turn the car off it won't pull back coolant from the ...