Bon ami powder - Rusty dollar

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   In a recent post to Tracy Martin, you mentioned using bon ami powder to help seat new rings. Please shed some light as to how this can be done! Recently put a rebuilt Kohler Kt-17 in a 917 lawn tractor and it smokes and uses oil badly. OEM rings weren't available and aftermarket (Chinese) were used. Thanks for any help!

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only AC orange Members Profile Send Private Message Find Members Posts Add to Buddy List Silver Level Access Joined: 06 Dec 2014 Location: Eastern Indiana Points: 383	Post Options Post Reply Quote only AC orange Report Post Thanks(0) Quote Reply Topic: Bon ami powder - Rusty dollar Posted: 02 Jun 2021 at 1:46pm
	In a recent post to Tracy Martin, you mentioned using bon ami powder to help seat new rings. Please shed some light as to how this can be done! Recently put a rebuilt Kohler Kt-17 in a 917 lawn tractor and it smokes and uses oil badly. OEM rings weren't available and aftermarket (Chinese) were used. Thanks for any help!

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Tad Wicks Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 27 Mar 2011 Location: Shandon, CA Points: 2160	Post Options Post Reply Quote Tad Wicks Report Post Thanks(0) Quote Reply Posted: 02 Jun 2021 at 3:24pm
	I wouldn't jump to abrasives just yet, given that the rings you used might be questionable, I would be sure that end gap, land clearance, any pip marks or stepped rings are in the right position, I would imagine that the rings should be ductile cast and not chrome except for maybe the oil control ring, was the cylinder honed to facilitate the seating of new rings? if the cylinder is glazed you should be able to crank the piston to the bottom of the hole and see it, it will look blue-grey. Now, chrome is a different, especially chrome on chrome, I have seen an airplane mechanic fluffing a brand new chrome overhaul on an aircraft engine, sometimes that's what it takes, over pre-oiling chrome rings can certainly start a problem with glazing, I would just be sure that everything else is as right as it can be before introducing abrasives into the cylinder.

Coke-in-MN Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 12 Sep 2009 Location: Afton MN Points: 41184	Post Options Post Reply Quote Coke-in-MN Report Post Thanks(0) Quote Reply Posted: 02 Jun 2021 at 6:06pm
	tried it on a motorcycle engine that was puffing smoke on one cylinder - as it had 2 carbs just pit bon-ami on hand and blew across it into that carb when running - tried it twice and didn't work - ended up replacing jug and pistons - so can't say it works every time . Old neighbor was a mechanic for moving company truck fleet - said he did it for old Red Diamond and Black Diamond truck engines as rings never seemed to seal well and he had good luck on most . Then he went to a ball hone (like used on aircraft engines) - for proper size bore and had no problems after , it seems a normal long stone cylinder hone did not leave a good wear in hone pattern
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