Catastrophic Oil Leak on C2 - NCRS Discussion Boards

Catastrophic Oil Leak on C2

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  • Jeffery F.
    Infrequent User
    • January 11, 2021
    • 27

    #16
    Re: Catastrophic Oil Leak on C2

    Thanks to everyone who responded. No, I never did find the cause of the leak. The old gasket was cleanly removed. I don't want to risk this leak again so I am going to add a spin-on oil filter conversion kit to my driver '66. This can be reversed to the old canister should I decide to be flight judged again.

    Comment

    • Joe L.
      Beyond Control Poster
      • February 1, 1988
      • 43221

      #17
      Re: Catastrophic Oil Leak on C2

      Originally posted by Jeffery Fawcett (67617)
      Thanks to everyone who responded. No, I never did find the cause of the leak. The old gasket was cleanly removed. I don't want to risk this leak again so I am going to add a spin-on oil filter conversion kit to my driver '66. This can be reversed to the old canister should I decide to be flight judged again.
      Jeffrey------


      Converting to a spin-on oil filter might not be a bad idea. I've even recommended it in the past. However, I just do not understand why correcting your leakage problem has turned out to be such a daunting, if not insurmountable, task. It, apparently, did not leak prior to the oil change. So, you know it has to be related to something associated with the oil change. The most common problems have been discussed here. If it's not one of those, then I would do a more thorough inspection of the parts and installation. The answer has to be somewhere there. Since there are not a huge number of even possibly involved components, it just shouldn't be all that difficult to get to the bottom of this.
      In Appreciation of John Hinckley

      Comment

      • Joseph L.
        Very Frequent User
        • July 26, 2012
        • 162

        #18
        Re: Catastrophic Oil Leak on C2

        Torque the bypass valve housing to block bolts to 90 in-lb. and the canister to 20 ft-lb.

        Joe

        Comment

        • Jeffery F.
          Infrequent User
          • January 11, 2021
          • 27

          #19
          Re: Catastrophic Oil Leak on C2

          The bypass valve housing bolts were not touched but the canister was indeed torqued to 20 ft.-lb.

          Comment

          • Lawrence S.
            Very Frequent User
            • April 1, 1993
            • 801

            #20
            Re: Catastrophic Oil Leak on C2

            Originally posted by Paul Harrington (34948)
            The gasket dropping down or being kinked will cause a leak. I always run a flat blade screw driver around the seating area after removal of the old gasket to be sure there is no remnant of the old gasket in there.
            Sometimes when you are tightening up the cannister to mate with the top it can be crooked and misaligned. Be attentive to how straight it is by looking at its distance from the bellhousing.
            Paul, I install my gasket/change the oil the exact same way you are describing. I do take a small scribe and run it over the area to receive the gasket to confirm there are no remnants. I have installed my canister a little crooked before too but noticed it before I started the car. I change my gasket each time I change my oil.

            Comment

            • George J.
              Very Frequent User
              • March 1, 1999
              • 775

              #21
              Re: Catastrophic Oil Leak on C2

              This is a job where a collection of picks is invaluable for both removal and installation. I can't tell you how often I have used them, once I had them!

              Comment

              • Mark E.
                Extremely Frequent Poster
                • April 1, 1993
                • 4542

                #22
                Re: Catastrophic Oil Leak on C2

                Originally posted by George Jerome (31887)
                This is a job where a collection of picks is invaluable for both removal and installation. I can't tell you how often I have used them, once I had them!
                I once asked my dental hygienist for a dental cleaning pick instead of the usual goody bag (toothbrush, paste, floss). She gave me several old ones which I often use for o-rings and such.
                Mark Edmondson
                Dallas, Texas
                Texas Chapter

                1970 Coupe, Donnybrooke Green, Light Saddle LS5 M20 A31 C60 G81 N37 N40 UA6 U79
                1993 Coupe, 40th Anniversary, 6-speed, PEG 1, FX3, CD, Bronze Top

                Comment

                • Jeffery F.
                  Infrequent User
                  • January 11, 2021
                  • 27

                  #23
                  Re: Catastrophic Oil Leak on C2

                  Update on the possible cause for the catastrophic oil leak... today when my brother and I were installing a Trans Dapt spin-on oil filter conversion kit, as we removed the pressure relief valve body from the engine block's oil filter cavity, one of the bolts holding on the pressure relief valve body was very loose and could even be removed by hand. This loose part could have potentially be the reason the canister was not / could not be totally sealed on the engine block, thus the leak. Thoughts?

                  Comment

                  • Duke W.
                    Beyond Control Poster
                    • January 1, 1993
                    • 15672

                    #24
                    Re: Catastrophic Oil Leak on C2

                    No... a loose bypass filter housing will just cause an internal leak allowing a small amount of oil to bypass the oil filter, but at long as the filter is properly seated to a properly installed housing gasket there will be no external leak.

                    It's always been my opinion that bolts don't loosen up. If you find a loose bolt it's about a 99.99% chance that the fastener was not properly installed i.e. insufficient torque. If there is a torque spec on a fastener, I ALWAYS use a torque wrench unless it's just nearly impossible to because you have to use a crowfoot socket, a u-joint, and one or more a "wobbly extensions" to reach the fastener head. It's my car that I will probably own until I'm taking a dirt nap, so no need to take shortcuts.

                    If you follow my recommendations in post #3, and use a torque wrench to tighten the fasteners to the specs listed in post #19 you will never have another major leak from the oil filter housing after a filter change.

                    Duke

                    Comment

                    • William F.
                      Extremely Frequent Poster
                      • June 9, 2009
                      • 1363

                      #25
                      Re: Catastrophic Oil Leak on C2

                      Just use a pick of some kind-I flaten the end of a heavy duty paper clip to remove gasket. If careful, no need to remove screws, etc. Also, make suer cannister is not cocked at an angle when tightening the big bolt that holds cannister in place.

                      Comment

                      • William F.
                        Extremely Frequent Poster
                        • June 9, 2009
                        • 1363

                        #26
                        Re: Catastrophic Oil Leak on C2

                        Both excellent suggestions, Paul. Also remove old gasket and replace with new one on EVERY oil change. No big deal since most of us only change oil once a year or every two years.

                        Comment

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