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Enduro Engine - 2 stroke Cylinder, Piston, Tranny, Bearings, Clutch, Pipes & Silencers, etc. |
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#1
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Strange spots on piston
Is this normal for the coating to come off like this? I know wearing off is normal, but I have not seen these blobby spots before...
It's an S3 top-end/cylinder kit. ~15h on it. What do you think?? TIA
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06 EC300 |
#2
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Looks like a low-pressure fluid flow after shut down rather than a high compression blow-by.
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#3
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to be clear, i am talking about the silver blob marks, where it appears the "moly"(??) coating has worn/chipped off.
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06 EC300 |
#4
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Are you saying something (like gas?) is eating the coating off after shutdown?
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06 EC300 |
#5
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strange pattern
I am having trouble w pic. Is that the piston skirt, or is it cylinder wall w piston at bdc? Either way, i have never seen that. Just trying to understand what i am looking at.
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2012 xc300 - Great bike! sold looking for 18+ |
#6
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Its piston skirt. I've not seen the coating wear off like that either..
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#7
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Yep. It's the skirt and you can't feel them.
Someone with a lot of experience with engine building figures it was just not cleaned well prior to coating.
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06 EC300 |
#8
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Mine are like that.
Probably from the ethanol blended swill. |
#9
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no ethanol has touched this engine since I have owned the bike. well before rebuild.
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06 EC300 |
#10
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The coating on my Worsner piston came off too, but a little more uniformly. See you on the RZ site also.
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