Ultimate Troubleshooting Guide Fixing a Radiator Cap That's Not Holding Pressure

Check the spring on the radiator cap for rust. Replace the radiator cap if the spring is rusted or compresses with difficulty. Pressure test the radiator cap to ... The cap and it's pressure relief setting are almost certainly correct after all the work previously done, but I'd double check the concentration ... 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 ... If desperate, drill the cap for zero pressure. Route the overflow into a 2 liter jug for catch. Drive conservatively. Your coolant must be mixed ... To make a no-pressure cap, you want to remove the inner seal, and fully tighten the cap so the outer seal keeps the coolant in the radiator and the overflow ... I'd try a new cap first. If the pressure goes over 15 pounds it should vent through the side cap, not the top. 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 ... Before you replace the rad make sure that it is leaking and not the cap. I have had many aftermarket caps leak. The easiest fix for a new cap is ... You may see bubbles rising in the pressure tank. There won't be gases trapped in the radiator. . With a developing fire ring leak,after driving awhile and while ... It means your system is fully sealed and not leaking anywhere. I'd pop the cap however and make sure your radiator is filled right to the bottom ...