found some plastic bits in my oil

Discussion in 'Airheads' started by sky44, Jun 17, 2019.

  1. sky44

    sky44 Been here awhile

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    just under 1/8" diameter. perhaps part of a seal?

    bike is running good, the only leak I've got these days is the oil pressure sender and I just installed a new crush washer so that should be GTG.

    I did just pull the top end & cylinders off to re-seal over the winter- though I don't recall anything that looked like the pieces in question .

    they're hard brittle plastic bits. I cut the oil filter open as well- nothing weird in there.

    I have a spare pan gasket- I'll yank the pan if you guys can tell me what to look for otherwise I'm just gonna keep running this old tractor engine. I did do a quick boroscope inspection through the oil drain hole- saw no more plastic bits.

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    #1
  2. Disston

    Disston ShadeTreeExpert

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    What year and model of Bike?

    Looks sort of circular like it was an O-ring shape? But it is harder than O-ring ribber? If it was a ring shape is it complete? I mean can you lay the pieces together and get a complete O?

    We usually figure these things out. Sorry I haven't a clue at the moment.
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  3. sky44

    sky44 Been here awhile

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    It's quite hard material. I think I've got about half a ring there.

    Planning to yank the alternator cover tonight to check for leaks. I'll try to scope the clutch area too.

    I could imagine this being part of a main seal perhaps.

    It's a 94 r100gs
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  4. Plaka

    Plaka Brevis illi vita est

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    if it is very hard brown plastic (wash the bits with alcohol) look at the timing chain tensioners while you have that cover off. Most seals are soft stuff, not hard stuff. Bushings and sliders are hard stuff.

    they could be some sort of sealant that squeezed out then was shed.




    You also might listen to the timing chest with a mechanics stethoscope with the bike idling. If you hear the timing chain rattling just do a timing chain job and don't worry.
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  5. ME 109

    ME 109 Long timer Supporter

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    Dipstick oring?
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  6. sky44

    sky44 Been here awhile

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    God that'd be nice. I'm gonna yank that timing cover and have a look though
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  7. ME 109

    ME 109 Long timer Supporter

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    Timing cover? Don’t think you’ll find much.
    Sump maybe, but even that probably won’t achieve much.
    These little bits aren’t an issue, imo.
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  8. sky44

    sky44 Been here awhile

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    I'm not sure i've ever noticed an o-ring on my dipstick... possible it disintegrated long ago and is finally making its way out of the sump.

    just took a quick look at the service manual- nothing in the timing chain area looks much like old o-ring bits.

    i'm leaning toward putting in a filter, filling it with vr1 and carrying on with my summer hooligan shit.
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  9. Warin

    Warin Retired

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    Did the needle rollers for the rockers have a plastic cage for that year?
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  10. toecutta

    toecutta Been here awhile

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    looks like disintegrated needle bearing cage?
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  11. Disston

    Disston ShadeTreeExpert

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    If it's an old hardened dip stick O-ring it would have fallen into the sump and stayed there. Would be worth while to pull the oil pan and find the rest of it.
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  12. sky44

    sky44 Been here awhile

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    I'll pull the valve covers off soon. I did just have those apart, and nothing looked amiss.

    thing is these pieces are totally round. it does look just like an o-ring, but very hard and brittle (which I suppose hanging out on the side of a big hot motor for 25 years will do to an o-ring)
    I'd expect a bearing cage to have more of a square profile....

    other question- if I pull the pan isn't there some pickup tube I'm supposed to tighten and threadlock so snowbum doesn't come to my house and kick me in the jimmies or something?
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  13. Plaka

    Plaka Brevis illi vita est

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    yes. the bolts holding on the oil pickup. given the oil temps, i would safety wire them. if the pickup comes loose you lose the engine.
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  14. sky44

    sky44 Been here awhile

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    there a good source for drilled hardware or do I have to do that myself too?
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  15. Plaka

    Plaka Brevis illi vita est

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    oh you poor helpless child. allow my heart to bleed for you.

    you tighten the bolt. then you mark it so you know which side gets the hole. then you take it out and put it in the cheap drilling jig you get anywhere. i just use my drill press vice. in this particular application it won't wire the bolts to each other, i will wire them to the pickup body.
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  16. sky44

    sky44 Been here awhile

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    I may have a heated garage but I don't have a drill press anymore.

    I do have a tig welder though. perhaps a quick tack-a-roo? :getiton (kidding)
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  17. UnclePete

    UnclePete Been here awhile Supporter

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    Wonder how many of those oil pickups have come loose .
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  18. sky44

    sky44 Been here awhile

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    mine has 55k on it... Probably not that many based on how many airheads are still on the road.
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  19. ME 109

    ME 109 Long timer Supporter

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    I wouldn't even bother taking the sump off.
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  20. sky44

    sky44 Been here awhile

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    you keep saying that and i'm leaning that way. couldn't find any more pieces with the scope through the drain hole or in my filter. haven't ridden in 3 days and it's starting to make me an asshole.
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