Bon ami powder - Rusty dollar
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Garden Tractors
Forum Description: A great place to discuss the Simplicity and Allis Chalmers Garden Models
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=180938
Printed Date: 23 Nov 2024 at 6:36pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: Bon ami powder - Rusty dollar
Posted By: only AC orange
Subject: Bon ami powder - Rusty dollar
Date Posted: 02 Jun 2021 at 1:46pm
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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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Replies:
Posted By: Tad Wicks
Date Posted: 02 Jun 2021 at 3:24pm
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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.
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Posted By: Coke-in-MN
Date 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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