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Gas smell in oil

Discussion in 'XJ Technical Chat' started by Glen F., May 4, 2021.

  1. Glen F.

    Glen F. Active Member

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    Put a small bit of lube on all the gaskets. Put some gas in it. Clamped off the vacuum line, and a small steady drip from the fuel port. I'm heading to the store to grab the brake bleeding kit to see if that vacuum changes anything.
     
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  2. Mechanic1978

    Mechanic1978 Active Member

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    @hogfiddles @k-moe

    I have not been in this valve for a few years now, someone more familiar with it, chime in and answer me a question..

    before the chrome 2 bolt chrome ring goes on aint there suposed to be a bent (spring) plate that goes on first, then the finish chrome ring plate? Im pretty sure there is, its function is to keep the valve handle pressure agnst the flat seal.. either of you know? I think hes missing a part... the half bent spring shim plate...and outter o ring right?
     
    Last edited: Jul 17, 2021
  3. Mechanic1978

    Mechanic1978 Active Member

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    I believe your missing two parts for that petcock.....#17 and #15

    17 is another o ring, and 15 is the wave spring plate..

    ghgjkth.JPG
     
  4. Glen F.

    Glen F. Active Member

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    15 is the wave washer and 17 is the o ring that goes around the lever
     
  5. Mechanic1978

    Mechanic1978 Active Member

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    yes i got them switched, good call, however where is your #15 at? I did not see it in your pictures? thats what keeps the valve handle tight agnst the flat rubber with 4 holes.

    and for reference: the fuel enters the valve out of the center hole.
    Pri- is for full flow priming, adter a run dry tank, or carb rebuild.
    Res- is for low level fuel in the tank.
    On-is where it should be set for normal riding and testing the valve for leaks.

    On- setting should not allow any fuel unless the diaphram is operating.
     
    Last edited: Jul 17, 2021
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  6. Glen F.

    Glen F. Active Member

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    It's there. Just tried the vacuum pump, and it doesn't hold pressure at all. Guess that's where my problem is.
     
  7. Mechanic1978

    Mechanic1978 Active Member

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    ok, I just didnt see it in your picture, and it is crucial its there. ok, set the valve to the "on" position, and run a hose from the vacume connector on the diaphram plate to a seperate canister...
    see if it starts to drip over a 30 minute time frame....

    (fuel in tank, block off the fuel feed to the carbs on the valve, and place a hose from vacume connector to a can to catch any fuel)... if you get a single drop, its a bad diaphram.
     
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  8. Glen F.

    Glen F. Active Member

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    I have the tank off and attached the pump. It started leaking before I applied pressure. When I placed my order for the rebuild kit, I don' think I ordered a new wave washer. Could this be leading to my problems?
     
  9. Mechanic1978

    Mechanic1978 Active Member

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    the wave washer is just bent spring steel, meaning you can tweak the bend in it to get the righ pressure. but yes you can always order a new one if its even available.

    whaer was it leaking from? point at it in a pic.
     
  10. Glen F.

    Glen F. Active Member

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    It's dripping out of the fuel line connection.
     
  11. Mechanic1978

    Mechanic1978 Active Member

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    yep your on the right track with the wave washer, and or its not assembled in the correct order. But I take your word for it that it is.

    while it is dripping, use your hand and push in on the valve handle and see if it stops dripping. about 30 seconds to just under a minute should be good. if it stops dripping then yes its not sealing tight agnst the flat rubber seal.
     
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  12. Glen F.

    Glen F. Active Member

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    Yup. That's the problem. It stopped dripping right away. I'm guessing I could ride the bike as long as when I shut it off, I drain the gas. LOL
     
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  13. Mechanic1978

    Mechanic1978 Active Member

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    exellent that you got it figured out Glen, whew!...

    try bending the wave washer a little more, its ok to put a good bend in it, as you reassemble it, it will flatten out some anyways. dont bend it too far and snap it in half. also contact Info@xj4ever and see if that wave washer is available. you can get the oem part number off www.bikebandit.com.
     
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  14. Mechanic1978

    Mechanic1978 Active Member

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  15. Glen F.

    Glen F. Active Member

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    Put a slight bend to the wave washer, and that stopped the drip. I have a clear hose attached to the port to see if there is any gas slowly leaking. I'm going to check in a while, but still going to order a new washer. Thanks for your help!!!!
     
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  16. Glen F.

    Glen F. Active Member

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  17. Mechanic1978

    Mechanic1978 Active Member

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    Any time Sir, !
     
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  18. hogfiddles

    hogfiddles XJ-Wizard, Host-Central NY Carb Clinic Moderator Premium Member

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    Read through the petcock rebuild instructions… I believe lemon says something about needing to gently tap the part inside with a hammer to seat it
     
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  19. Glen F.

    Glen F. Active Member

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    Either I put the wave washer in wrong, or the slight bending I did to it helped. I attached a clear hose on the fuel port and left it for an hour with no drips at all. Thank you for your help!
     
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  20. Franz

    Franz Well-Known Member

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    Sorted that's super.
     
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