Unlocking the Secrets of Radiator Cap Repair A Complete Guide to Fixing Pressure Loss

... 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 ... 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 ... loose belt, loose hose clamp, strainer lid not tight.... If you still have the old cap and pressure tester, you can test the cap and see where ... > replace the cap. ... > leaking. Wonder if I should replace the cap. Rad caps get old and REFUSE to hold pressure, which will cause boiling. Clue #5- Damaged radiator hose ... A defective radiator cap can build enough pressure in the cooling system, bursting the radiator hose. If this ... 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 ... In normal use, the pressure will never be anywhere near 1.4Bar, much less 2.0. Maybe try spraying some soapy water around the connection of the tester to the radiator. Another thought is to put the cap back on and run it up ... The cap could be bad. It should hold 16 psi. If not that might explain your problem. Have it tested at a radiator shop. If it is good, it might be head gaskets. 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 ...