Cooling Crisis Solved A Step-by-Step Guide to Fixing a Radiator Cap Pressure Problem

if your cap isn't holding pressure take off the cap (Make sure your engine is cooled and de-pressurized first!) and take a pair of needle nose ... With modern radiator caps you get half a twist and it dumps the pressure to the overflow tank. After that half a twist you have to push it down ... I'd stay with 16 PSI radiator cap. It raises the boiling temp of coolant and also is a high pressure limiter for the cooling system. The radiator cap, however, is supposed to hold pressure and release when over the set pressure (~15 psi) and can be the cause of overheating if it doesn't hold ... 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 ... Usually what happens is they won't hold pressure. It is possible that the vent is plugged up. But there only suppose to vent in case of a ... Engine cold, loosen the cap to release any pressure then put it back on. Squeeze the top radiator hose to feel for pressure inside. Start the ... No, the whole idea of the pressure tester is so you can test the system COLD. Hook the tester to the radiator, pump it up, and watch it hold ... They generally fail by leaking or not holding enough pressure. It's recommended by some manufacturers to replace the radiator cap whenever the ... 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 ...