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  1. #1

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    Jun 2008
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    Oil injection check valve pressure

    I'm trying to see if my in-line oil check valves are working properly. How much pressure should it take to make them open. I tried blowing through the hose (yes, with my mouth!) and that wasn't working. I shot some air through it with an air compressor with regulator set on about 20psi and blew oil out the other side. Does that sound about right? Seems like that's a lot of work for that little oil pump!!


  2. #2
    Moderator DrewNJ's Avatar
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    Dec 2005
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    It's not really a pressure type of valve, it's a flow valve. It doesn't open at pressure. It's more of a one way valve. It should allow the oil to pass through easily going toward the carbs but not allow oil to flow back...
    I have mine out and can easily blow through them one direction but not the other...

    The resistance you feel may be because you still have the oil lines still attached with oil in them??? The oil in the small line will give a considerable resistance.

  3. #3

    Join Date
    Jun 2008
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    that could be it, I'll take em off the line and check em out! Thanks

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