Empowering You to Fix a Radiator Cap That Refuses to Hold Pressure

After the engine has fully warmed up, the coolant has expanded and raised the pressure in the closed system. Loosen the exp tank cap slowly ( ... 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've seen a few facebook posts on folks changing their 200 cap to a 140 cap part # PCD000070 explaining "boiling temperature of coolant and ... Open the hood, check that your radiator is fully filled by opening the cap. Then tighten the cap and run the engine until it reaches operating ... What I suspect is the neck may be too long on your bottle for the cap you are using. This is a common problem with oem bottles as they are euro necks and caps ... Before you sign off on the radiator cap being the problem, check to make sure that your overflow tube isn't clogged. If it is, the pressure buildup will force ... 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 ... 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 you can get it clean and dry you can temporarily fix it using two part steel epoxy putty. Mix the putty well and roughen the area with coarse ... They generally fail by leaking or not holding enough pressure. It's recommended by some manufacturers to replace the radiator cap whenever the ...