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  1. #1

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    Testing Crankcase Vacuum or Pressure or either

    Just like the title says can you test a crankcase by using only pressure or will testing with a vacuum do the same thing? I would think either would work, but I cannot find any threads saying so.


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    Anybody

  3. #3
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    Keep in mind that single lip seals are directional, i.e. they seal better in one direction than the other. That's why the service manual will tell you to install a seal facing a certain way. Therefore, I would say that testing should be done with pressure only.

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    When you detect a leak on vacuum test, how are you going to find out where is the leak? just curious.

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    Quote Originally Posted by keithg1964 View Post
    Just like the title says can you test a crankcase by using only pressure or will testing with a vacuum do the same thing? I would think either would work, but I cannot find any threads saying so.

    Why would you be interested in measuring crankcase pressure, is there a problem?

    If yes, Leak down test would be first thing ill be doing.

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