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oil cap leak

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  • oil cap leak

    I'm getting some oil spray out of the filler cap which gets a little messy. Will replacing the cap alleviate the problem?

  • #2
    Washing your existing cap out in a solvent parts washer might help.
    Couple of items to think about...
    a) How clean is your oil?
    If your oil in the engine is old and sludgy, perhaps the drainback areas of the head are clogged up and the valve cover area is inundated with oil.
    b) What is your oil pressure?
    Have you serviced your oil pressure regulator valve? If this valve plunger sticks, you could have too much oil pressure, and possibly pump too much oil up top. Doubtful, but anything is possible.
    c) What year engine? If your engine has a PCV valve ('63 on up), it may be clogged and your crankcase could be building up pressure and pushing some oil out the breathers.
    d) How about blow by? If your rings are shot you might have excessive blow by that could cause that too, but you'd have several other symptoms to go along with that...
    Hope the info helps.
    Jeff[8D]


    quote:Originally posted by bing kunzig

    I'm getting some oil spray out of the filler cap which gets a little messy. Will replacing the cap alleviate the problem?
    DEEPNHOCK at Cox.net
    '37 Coupe Express
    '37 Coupe Express Trailer
    '61 Hawk

    http://community.webshots.com/user/deepnhock
    HTIH (Hope The Info Helps)

    Jeff


    Get your facts first, and then you can distort them as much as you please. Mark Twain



    Note: SDC# 070190 (and earlier...)

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    • #3
      Thanks for your reply:
      A. 1500 miles on last oil change-almost due to add a quart.
      B. oil pressure is 40-60 range. Haven't checked oil pressure regulator valve.
      C. '57 S. Hawk
      D. Approx 7000 on rebuilt engine.

      Comment


      • #4
        Ok.. 6, or V8?

        If a V8, what part of the country?
        (Thinking mud daubers and your road draft tube)
        Is the filter mesh in the road draft tube clean?
        Oil pressure sounds ok, but I would service the relief valve anyways, just to be sure..
        1500 miles to a quart doesn't sound awful... But a bit high for only 7000 miles. Any leaks?


        quote:Originally posted by bing kunzig

        Thanks for your reply:
        A. 1500 miles on last oil change-almost due to add a quart.
        B. oil pressure is 40-60 range. Haven't checked oil pressure regulator valve.
        C. '57 S. Hawk
        D. Approx 7000 on rebuilt engine.
        DEEPNHOCK at Cox.net
        '37 Coupe Express
        '37 Coupe Express Trailer
        '61 Hawk

        http://community.webshots.com/user/deepnhock
        HTIH (Hope The Info Helps)

        Jeff


        Get your facts first, and then you can distort them as much as you please. Mark Twain



        Note: SDC# 070190 (and earlier...)

        Comment


        • #5
          speaking of blowby... my '55 fails the "dollar bill" test at anything above a fast idle... but I have NO oil coming out the breathers, even though I am running aluminum valve covers with no baffles. Yes there is oil to the heads. I guess it would take a LOT of blowby to pump oil out... check the PCV first.

          I am guessing in my case it is one or two stuck rings because when I changed the valve stem seals most of the cylinders didn't hiss at all under pressure but a one or two did. I'm hoping that just driving some would free them up.

          If you have shop air and a spark plug adapter that's the easiest way to check for leaky rings...

          nate

          --
          55 Commander Starlight
          62 Daytona hardtop
          http://home.comcast.net/~njnagel
          --
          55 Commander Starlight
          http://members.cox.net/njnagel

          Comment


          • #6
            I will take 1500 miles to a qt of oil. The top of the cylinders are getting lubed. Were Studebaker V8's non oil burners in their time? What range do folks accept for oil useage?[?]

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            • #7
              My '64 259 runs great, has no significant blowby, and only leaks a quart every 800 miles.

              Mark

              MarkC, 64 Y8
              Working in Spokane, WA

              Comment


              • #8
                What is the dollar test?

                Comment


                • #9
                  Set a dollar bill or other thin, light piece of paper over the oil fill hole with the breather removed, should be sucked onto the hole by the vacuum pulled by the PCV and not flutter or blow off.

                  nate

                  --
                  55 Commander Starlight
                  62 Daytona hardtop
                  http://home.comcast.net/~njnagel
                  --
                  55 Commander Starlight
                  http://members.cox.net/njnagel

                  Comment


                  • #10
                    It's a V8, in southern Calif. Haven't checked the draft tube. Just had the engine re-sealed because it was leaking copius amount of oil. No leaks now. I'm thinking this started after the engine was re-sealed. Maybe that means there is more internal pressure. I'll start with the relief valve.

                    Comment


                    • #11
                      Holy Jesus! How do you get the dollar bill back out?

                      quote:Originally posted by N8N

                      Set a dollar bill or other thin, light piece of paper over the oil fill hole with the breather removed, should be sucked onto the hole by the vacuum pulled by the PCV and not flutter or blow off.

                      nate

                      --
                      55 Commander Starlight
                      62 Daytona hardtop
                      http://home.comcast.net/~njnagel
                      ________________________
                      Mark Anderson
                      1965 Cruiser
                      http://home.alltel.net/anderm

                      Comment


                      • #12
                        onto, not *into!* I don't think any engine would be running particularly well if it were generating that kind of vacuum in the crankcase, unless it was being mechanically scavenged!

                        nate

                        --
                        55 Commander Starlight
                        62 Daytona hardtop
                        http://home.comcast.net/~njnagel
                        --
                        55 Commander Starlight
                        http://members.cox.net/njnagel

                        Comment


                        • #13
                          How do I perform this test in Canada, we have a coin for a dollar ?(Loonie)
                          Yea,and Im a bit loonie too(G)

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                          • #14
                            Nate/N8N - We are discussing a non-PCV engine here. How does your dollar bill test apply in this case? Are you doing the test while driving down the road?<G>
                            Gary L.
                            Wappinger, NY

                            SDC member since 1968
                            Studebaker enthusiast much longer

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                            • #15
                              I'd be checking that road draft tube for grunge clogging.[xx(]

                              Miscreant at large.

                              1957 Transtar 1/2ton
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                              1958 Provincial wagon
                              1953 Commander coupe
                              1957 President 2-dr
                              1955 President State
                              1951 Champion Biz cpe
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                              No deceptive flags to prove I'm patriotic - no biblical BS to impress - just ME and Studebakers - as it should be.

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