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Thread: Zero Pressure Radiator Cap?

  1. #1

    Zero Pressure Radiator Cap?

    Where can I buy a zero pressure radiator cap? Or is it possible to "break" a regular one to achieve this.

  2. #2
    Administrator Kingtal0n's Avatar
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    Quote Originally Posted by NiteRider View Post
    Where can I buy a zero pressure radiator cap? Or is it possible to "break" a regular one to achieve this.
    There is a reason they hold pressure, to help keep water from boiling at high temperatures by raising the boiling point.

    Of course you can "break one" to hold it open so that hot coolant comes out at will instead of under excessive pressure. But you would be putting your engine at risk of big problems, forming high temperature bubbles where theres should be none.
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  3. #3
    I have a swirl pot with the pressure cap, I need one for the radiator itself with no pressure.

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    Administrator Kingtal0n's Avatar
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    Quote Originally Posted by NiteRider View Post
    I have a swirl pot with the pressure cap, I need one for the radiator itself with no pressure.
    Take a look at a cap. There is a rubber stopper held in check by a spring. Think of a creative way to either disable the spring, or cut/modify the rubber stopper to ruin it's pressure holding capability.
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