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Oil leak from stator wire grommet!!

Discussion in 'The Garage' started by mikevar94, Jul 26, 2020.

  1. mikevar94

    mikevar94 XS400 Member

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    Hey guys,
    So I’ve had this infamous oil leak from my grommet that passes the stator wires thru the left side engine cover in my 81 xs400. I’ve tried replacing that engine gasket AND resealing that grommet with black RTV MULTIPLE times and it STILL leaks. I literally have no other ideas. I thought about just replacing the entire harness (assuming it comes with a new grommet) but I’m even having trouble finding a new replacement. Does anyone have ANY ideas or pictures of how they sealed it? It’s such a tight spot that every time I end up just globing as much sealant over the grommet as possible. I also removed it and put sealant between the grommet and the little U channel it sits in with NO luck. Help!!
     
  2. clegg

    clegg XS400 Member

    Are you sure it's not leaking from the neutral switch. It's a plastic piece with an o ring on the left side. This will leak with age.
     
  3. mikevar94

    mikevar94 XS400 Member

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    I’m not 100% sure but oil drips are coming from the inside the wire bundle under the bike that runs thru that grommet. I’ll check out the neutral switch tho bc it is in the same area. It’s hard tell because it doesn’t just leak at idle. It leaks after a ride when some oil pressure has built up and the revs have been brought up.
     
  4. amc49

    amc49 XS400 Enthusiast

    A rule everybody should know. NEVER use any silicone based RTV type sealer around anything with oil on it AT ALL. All sealing surfaces must be bone dry as in the California desert. I'm betting the rubber grommet there is oil permeated and the oil then seeps right around the RTV to make it come loose as no RTV on earth will stay adhered in the presence of oil. It gradually releases to come loose as a long string of it and the best thing to clog up oil pump pickups and blow motors up there is.

    If the grommet has gone soft and squishy there is nothing to do but replace it. If it still has firm body you can cut some shim material say from an inner tube to wrap around it or inside it to give more crush, the removal of space may well stop the leak if done intelligently. I've done it before. Forget the RTV.
     
  5. mikevar94

    mikevar94 XS400 Member

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    Yea my grommet is pretty shot. It seemed quite soft and even cracked. I would love to replace it but I literally cannot find one online anywhere. I may try to shim it but it there’s a crack I don’t think it’ll help much.
     
  6. amc49

    amc49 XS400 Enthusiast

    Can you pic the shape of it?
     
  7. mikevar94

    mikevar94 XS400 Member

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    Im not following you what do you mean?
     
  8. amc49

    amc49 XS400 Enthusiast

    Take a picture of it and post it using your phone...........
     
  9. mikevar94

    mikevar94 XS400 Member

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    Guys I think I’m on to something! Check out the image. I think it’s leaking from what I think is the clutch push rod seal and also what plug that is underneath it. Also please pay not mind to my terrible rtv job. That area around the rtv seems very dry tho which is good!
     

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    Last edited: Jul 30, 2020

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