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Oil in #2 Exhaust

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  • #1

    Oil in #2 Exhaust

    Well the engine is running again. However, there is smoke coming out of the #1/#2 exhaust. Dirty oil leaked out of the coupling between the pipe and muffler after a while. Bad news.

    I pulled the plugs and #2 is fouled with oil (black). So I checked compression and it's at 142 psi which is in specs and the same as the others.

    I removed the pipes and a small amount existed in the exhaust from #2 cylinder. Others are clean.

    I replaced the valve seals when I put the engine back together. Could one be blown? Since the oil exists in the cylinder, could it be on the intake side?

    The compression rules out rings. Also #2 is beside the central cam chain shaft and the head gasket could be leaking there. However the compression rules that out as well.

    When the original leak occurred I noticed the fouled plug but decided it was from an over abundance of fuel in the system from the stuck floats.

    So any suggestions? Should I maybe run the system longer and hope that it "cleans out"? Or maybe pull the intake and look for oil around the valve? I would hate to have to pull the cylinders again.

    Thanks for any suggestions.
    _________________________________________
    1981 XS1100SH (Lola) - Bright Cardinal Red
    Whatever Lola wants, Lola gets.. Don't mess with Lola.
    Mostly stock with a few minor upgrades
    1981 XS11000SH being used for parts (Sold off)

    Also have:
    2009 Harley Davidson FLSTC with over 120K miles. All mine.

    Currently traveling the country with an aluminum can in tow and a motorcycle in the truck bed in search of the perfect road.
    Tags: None
  • #2
    Having just replaced the valve seals, I'd question whether one was improperly installed. A final check would be a leak-down test, but ur compression test shows that may not be necessary. I'd clean the oil out of the pipe, etc., and run it till u no-longer see smoke.
    1979 XS1100F
    2H9 Mod, Truck-Lite LED Headlight, TECHNA-FIT S/S Brake Lines, Rear Air Shocks, TKAT Fork Brace, Dyna DC-I Coils, TC Fuse Block, Barnett HD Clutch Springs, Superbike Handlebars, V-Star 650 ACCT, NGK Irridium Plugs, OEM Exhaust. CNC-Cut 2nd Gear Dogs; Ported/Milled Head; Modded Airbox: 8x8 Wix Panel Filter; #137.5 Main Jet, Viper Yellow Paint, Michelin Pilot Activ F/R, Interstate AGM Battery, 14MM MC, Maier Fairing, Cree LED Fog Lights.

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    • #3
      Originally posted by RichV View Post
      Should I maybe run the system longer and hope that it "cleans out"?
      Yes, I would. There was raw fuel in that pipe due to your flooding carb, let all of that blow out of there and I bet it will clear up.
      2H7 (79) owned since '89
      3H3 owned since '06

      "If it ain't broke, modify it"

      ☮

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      • #4
        I would run it awhile and see what happens as you will be no worse off than you are now. If it does not clear then prepare for some valve seal work (again) and yes, maybe even ring work. A leak down test will help you pinpoint the problem whereas just a compression test will not.
        Mike Giroir
        79 XS-1100 Special

        Once you un-can a can of worms, the only way to re-can them is with a bigger can.

        Comment

        • #5
          Fuel in oil

          Verify that there is no fuel in the engine oil from the previous fuel leak.
          1981 XS1100H Venturer
          K&N Air Filter
          ACCT
          Custom Paint by Deitz
          Geezer Rectifier/Regulator
          Chacal Stainless Steel Braided Brake Lines
          Chrome Front Rotor & Caliper Covers
          Stebel Nautilus Horn
          EBC Front Rotors
          Limie Accent Moves On In 2015

          Mike

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          • #6
            Just because you have good compression does not eliminate a bad or stuck oil control ring. Extra oil getting pass the oil ring could actually raise compression.
            80SG, 81SH, 80 standard parts bike, 81SH parts bike
            and new to me 78 standard dresser

            Comment

            • #7
              Originally posted by MPittma100 View Post
              Verify that there is no fuel in the engine oil from the previous fuel leak.
              Sorry about the late response. The oil seemed OK but I changed it anyway just in case.
              _________________________________________
              1981 XS1100SH (Lola) - Bright Cardinal Red
              Whatever Lola wants, Lola gets.. Don't mess with Lola.
              Mostly stock with a few minor upgrades
              1981 XS11000SH being used for parts (Sold off)

              Also have:
              2009 Harley Davidson FLSTC with over 120K miles. All mine.

              Currently traveling the country with an aluminum can in tow and a motorcycle in the truck bed in search of the perfect road.

              Comment

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