Transform Your Radiator Cap A Step-by-Step Guide to Fixing Pressure Issues

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 ... The cap you'll notice a spring and gasket. When pressure is below the rating it will stay closed and allow the coolant to cycle but as it heats ... 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 ... 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 ... Get the engine up to operating temperature with the pressure cap off, start the Block Chek test. Rev the engine to 2,000, 3,500, then back to ... I'd try a new cap first. If the pressure goes over 15 pounds it should vent through the side cap, not the top. If it's not visibly busted, then let's go deeper. Clean the seal and contact area on the radiator. I find a little soapy water works wonders— ... Raising the pressure also raises the boiling point.However at that pressure you could be taxing all your seals in the cooling system. I keep ... 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. ... 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 ...