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 Minor rusting in cylinder

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akcender
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PostSubject: Minor rusting in cylinder   Minor rusting in cylinder Icon_minitimeSun Jul 28, 2013 10:55 am

Just got a new tractor that had been left sitting outside for a while. The water made its way into the valves and a little bit in the combustion chamber. Because of this there are some rough spots towards the top of the cylinder near the head. So my question is: Do I need to tear it all down and hone it? Or do I just smooth it out with some Emory paper? I'll try to post a picture here soon.
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akcender
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PostSubject: Re: Minor rusting in cylinder   Minor rusting in cylinder Icon_minitimeSun Jul 28, 2013 11:14 am

Here are some pictures of it.  You can definitely feel it with your fingers.

Minor rusting in cylinder XMYnXKR

Minor rusting in cylinder RPCIZuZ
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Stretch44875
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PostSubject: Re: Minor rusting in cylinder   Minor rusting in cylinder Icon_minitimeSun Jul 28, 2013 12:18 pm

That's beyond honing.

Needs bored, oversized piston and rings. I'd run it just like it is, until it blows, then find another engine.
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k2500life
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PostSubject: Re: Minor rusting in cylinder   Minor rusting in cylinder Icon_minitimeSun Jul 28, 2013 3:19 pm

Get it as smooth as possible and run as is till it blows up
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Thunderdivine
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PostSubject: Re: Minor rusting in cylinder   Minor rusting in cylinder Icon_minitimeSun Jul 28, 2013 4:52 pm

Honing? Can't see the piston walls. But clean it with a scrape and sandpaper and do what stretch suggested. You'll be good for some years.

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crafsmankiller
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PostSubject: Re: Minor rusting in cylinder   Minor rusting in cylinder Icon_minitimeMon Jul 29, 2013 1:45 pm

My go kart motor is worse than that.
Been running it for years without problems
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Doc Sprocket
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PostSubject: Re: Minor rusting in cylinder   Minor rusting in cylinder Icon_minitimeFri Aug 02, 2013 5:50 pm

At this point, you could probably try to clean it up some with a small plain (2") wire wheel. Go pretty easy on it, you don't want to score the bejeezus outta the cylinder wall. The idea here is to take off the rust that protrudes from the surface, to minimize ring damage and hopefully improve sealing. This will leave pitting in the cylinder wall- but all things being equal, it's much better than chunks sticking out of the wall. You could very well get years of service out of it like this, with minimal compression loss, and/or smoke.

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Chopperhed
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PostSubject: Re: Minor rusting in cylinder   Minor rusting in cylinder Icon_minitimeFri Aug 02, 2013 7:15 pm

As Doc said, clean it up and run it.

My self being who I am, I would blast a quick hone through it to knock the high spots down, scuff the rings to take the glaze off, run a shortened break in, and it would likely last a decade
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Doc Sprocket
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PostSubject: Re: Minor rusting in cylinder   Minor rusting in cylinder Icon_minitimeFri Aug 02, 2013 9:02 pm

Good words, chopper- I'd give it a light honing too, but I didn't mention it because most folks don't have one, and overdoing it will make the situation worse.

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Minor rusting in cylinder Facebo12
Put down the wrench, and come out with your hands up!-Doc "Tranny Crusher" Sprocket, ATLTF Forum Admin, Thinkerer and Tinkerer, and all-around good dood. Wink

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Chopperhed
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PostSubject: Re: Minor rusting in cylinder   Minor rusting in cylinder Icon_minitimeFri Aug 02, 2013 9:52 pm

@Doc Sprocket wrote:
Good words, chopper- I'd give it a light honing too, but I didn't mention it because most folks don't have one, and overdoing it will make the situation worse.

Well said and true
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Doug
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PostSubject: Re: Minor rusting in cylinder   Minor rusting in cylinder Icon_minitimeSat Aug 03, 2013 4:22 pm

@Doc Sprocket wrote:
At this point, you could probably try to clean it up some with a small plain (2") wire wheel. Go pretty easy on it, you don't want to score the bejeezus outta the cylinder wall. The idea here is to take off the rust that protrudes from the surface, to minimize ring damage and hopefully improve sealing. This will leave pitting in the cylinder wall- but all things being equal, it's much better than chunks sticking out of the wall. You could very well get years of service out of it like this, with minimal compression loss, and/or smoke.

Wouldnt a copper/ brass wheel be lighter on the walls? Versus steel.

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Chopperhed
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PostSubject: Re: Minor rusting in cylinder   Minor rusting in cylinder Icon_minitimeSat Aug 03, 2013 8:08 pm

Doug Fackler wrote:
@Doc Sprocket wrote:
At this point, you could probably try to clean it up some with a small plain (2") wire wheel. Go pretty easy on it, you don't want to score the bejeezus outta the cylinder wall. The idea here is to take off the rust that protrudes from the surface, to minimize ring damage and hopefully improve sealing. This will leave pitting in the cylinder wall- but all things being equal, it's much better than chunks sticking out of the wall. You could very well get years of service out of it like this, with minimal compression loss, and/or smoke.

Wouldnt a copper/ brass wheel be lighter on the walls? Versus steel.
 
Anything softer than the cylinder wall would be good.
 
brass, fine stainless, composite.
 
Trick is to be gentle.

I've used a long piece pf 1/4" steel rod, with a slot in the end to old 2 pieces of 80 grit emery cloth back to back, mount it in a die grinder and go.
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PostSubject: Re: Minor rusting in cylinder   Minor rusting in cylinder Icon_minitime

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