What the heck is this?

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  • nyvoyager
    Senior Member
    • Jun 2012
    • 189
    #1

    What the heck is this?

    Water in oil saga continues. I'm about one inch from pulling the A4.
    In the meantime I run a compression test and pressurized the block. I don't have confidence in either test yet and will redo. I pulled the valve cover off. Just to the right of the right most valve? What the heck is it?
    Note I can't see directly so took pictures with flash on
    Tags: None
  • roadnsky
    Afourian MVP
    • Dec 2008
    • 3101
    #2
    Originally posted by nyvoyager View Post
    In the meantime I run a compression test and pressurized the block. I don't have confidence in either test yet and will redo.
    Can you explain WHY you don't have confidence in those tests?

    Note I can't see directly so took pictures with flash on
    No pictures?
    -Jerry

    'Lone Ranger'
    sigpic
    1978 RANGER 30

    Comment

    • Dave Neptune
      Afourian MVP, Professor Emeritus
      • Jan 2007
      • 5044
      #3
      I can't "see" your picture but does it look like a rusted out pipe plug? A few engines have a casting "fix" from the factory as I recall.

      Did your tests show maintaining pressure?

      Pics may just help.

      Dave Neptune

      Comment

      • nyvoyager
        Senior Member
        • Jun 2012
        • 189
        #4
        Sorry i don't know why the photo didn't post
        There is a metallic looking thing by the red arrow...under the rusted spring
        This and the plug are for the #4 cylinder.
        definitely something going on with #4

        Compression test: the motor sounds okay when running
        Block pressure test: i think the home depot gauge is leaking

        Almost have the head off
        Attached Files
        Last edited by nyvoyager; 05-12-2019, 10:42 AM.

        Comment

        • ndutton
          Afourian MVP
          • May 2009
          • 9601
          #5
          Originally posted by nyvoyager View Post
          Block pressure test: I think the Home Depot gauge is leaking
          Why do you think that? What evidence is there of a leaky gauge?

          Almost have the head off
          At what stage is the head removal? Once the seal of the head gasket is broken or the manifold is removed you can no longer pressure test.
          Neil
          1977 Catalina 30
          San Pedro, California
          prior boats 1987 Westsail 32, 1970 Catalina 22
          Had my hands in a few others

          Comment

          • nyvoyager
            Senior Member
            • Jun 2012
            • 189
            #6
            i put the gauge on a short length of hose and it didn't hold pressure.
            There are also many reviews on the HD site which state the same

            Good point - I only have about half the bolts loosened - the rest are soaking in pb blaster. haven't broken the seal yet. I'll try to test it again. But i think I'm pulling it anyway
            This engine is on borrowed time

            Comment

            • vtbob
              Senior Member
              • Jun 2018
              • 13
              #7
              the picture with the red arrow looks something like a problem that I had. If you do a search using vtbob you can see my water in oil post.

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