R/C Tech Forums - View Single Post - Can an engine with a bad bearing still run perfectly?
Old 11-27-2011, 07:44 AM
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MattP
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Originally Posted by tracktearer
There should be no visible play. If there is:
New crankpin=5.00mm, replace conrod
Bad crankpin =4.95mm, replace both
Well to my surprise after running more fuel through it today the noise went completely away.......

I bought this engine used. Is it possible it had sat for so long that the bearings were rusted or gunked up causing engine noise and after I put some fuel through it that they got lubricated and quit making noise?

I just put a whole tank through it and it never once made a noise.....
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