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Push-On Oil Cap Flies Off at High RPM's

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  • Push-On Oil Cap Flies Off at High RPM's

    OK, silly one here. I have a push-on style cap on my new taller valve covers. The cap flys off at 6000+ RPMs (weekend drag car). I was thinking of changing to a push-on cap that has the vent tube on the side and tying it into the PCV system?? I am not sure this is the right idea. I probably have a little blow by or maybe an insuffucient PCV valve. Maybe an oil breather would help? My thought is that the cap with the vent tube might relieve some pressure (?) or at least keep the cap in the engine bay if it flies off (because it will have some tubing attached to the tube and will be hooked into the PCV system or to a separate oil breather somehow). Maybe?
    At any rate, I lost my regular push-on cap a few days ago, and I need some ideas on how to keep a push-on oil cap from flying off. If I am off-base, please tell me so. Ideas??

  • #2
    Try another gasket/o-ring, I got some from the Zone that worked better that the one I had. Alex carries some rubber baffles that might work for ya.
    William

    Semper Fidelis

    Comment


    • #3
      We sell a K&N style breather cap that has the stepped push in nipple built into the bottom.
      If you use these with our baffled grommets it would be very difficult for them to come out as I have a hard time pushing them in.
      sigpic

      Alex Denysenko
      Co-Administrator

      NHRA/IHRA/NMCA member and licensed Superstock driver
      NHRA and IHRA SS/LA & SS/MA National Record Holder 99','00,'01,'02,'03,'04,'05 & '06
      First NHRA & IHRA 289 automatic Superstock Mustang in the TENS 06-99
      First SS/MA in the TENS 04-03
      5 time IHRA division 5 Superstock Champion
      Fleet of FoMoCo products including 88 ASC McLaren Mustang #28

      The Barry of BarrysGrrl

      Quote #1: "I never met a magazine mechanic I liked."
      Quote #2: "Make sure brain is in gear before engaging mouth!"
      Quote #3: "If you can't run with the big dogs, stay on the porch!"
      Quote #4: "Go fast or go home!"
      Quote#5:" No Brag,Just Fact!"
      www.moneymakerracing.com

      Comment


      • #4
        Is the cap vented? If it is vented very well, it shouldn't blow off.

        If it is NOT vented, you NEED a place for the crankcase to vent. If there is no vent, it will start pushing out gaskets and seals.

        Good Luck!
        http://webpages.charter.net/hotrods/n2oMike.jpg

        Mike Burch
        1966 Mustang, Toploader 4-speed
        Pump Gas Flat Tappet 302, 10.134 @ 134.71
        http://www.mustangworks.com/cgi-bin/moi-display.cgi?220

        Comment


        • #5
          Originally posted by Moneymaker View Post
          We sell a K&N style breather cap that has the stepped push in nipple built into the bottom.
          If you use these with our baffled grommets it would be very difficult for them to come out as I have a hard time pushing them in.
          OK, sounds good. What do they look like?

          Comment


          • #6
            http://store.summitracing.com/partde...5&autoview=sku
            sigpic

            Alex Denysenko
            Co-Administrator

            NHRA/IHRA/NMCA member and licensed Superstock driver
            NHRA and IHRA SS/LA & SS/MA National Record Holder 99','00,'01,'02,'03,'04,'05 & '06
            First NHRA & IHRA 289 automatic Superstock Mustang in the TENS 06-99
            First SS/MA in the TENS 04-03
            5 time IHRA division 5 Superstock Champion
            Fleet of FoMoCo products including 88 ASC McLaren Mustang #28

            The Barry of BarrysGrrl

            Quote #1: "I never met a magazine mechanic I liked."
            Quote #2: "Make sure brain is in gear before engaging mouth!"
            Quote #3: "If you can't run with the big dogs, stay on the porch!"
            Quote #4: "Go fast or go home!"
            Quote#5:" No Brag,Just Fact!"
            www.moneymakerracing.com

            Comment


            • #7
              i run them and they are great!!unk:
              mike r
              racing is real
              everything else is just a game.
              73 mach 1 clone
              83 ltd wagon, street strip. 302
              81 capri-302-7.25 @93mph 1/8
              1.54 60ft 50 % of the fun dragracing is meeting people who will give you the shirt off their back to wipe the grease off your hands.
              M&M member #839 http://i2.photobucket.com/albums/y6/mike470/adel2.jpg
              since nov. 2000

              Comment


              • #8
                Thanks for the help. My new oil cap with the vent tube is not flying off. I have a hose attached to it that is vented to the air/ground. To look more vintage or "correct," I guess the hose should go the air fliter housing, but my hipo-style air filter housing has a rubber plug and no fitting. Oh, well...

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