MS290- how does this cylinder look?

[liquidskin]

About to give my first rebuild a shot. I’m definitely replacing the piston but how does this cylinder look? I’ve already hit it with Muriatic acid and a scotch brite pad.

 

[HarleyT]

Hit it with some emory cloth for a good while.

 

[Colt Marlington]

See that crosshatch at the very bottom of the cylinder in the second pic? That's how the whole cylinder should look.

 

[liquidskin]

Hit it with some emory cloth for a good while.

Will have to pick some up. I may have some various grit sandpaper, including some very fine stuff if those could work?

 

[liquidskin]

See that crosshatch at the very bottom of the cylinder in the second pic? That's how the whole cylinder should look.

Yep, I took a closer look and see it. Is my cylinder too far gone? Budget for the project is sunk into piston, rings, bearing, seals... not sure I have any more room for a cylinder unless I go aftermarket

 

[Colt Marlington]

Yep, I took a closer look and see it. Is my cylinder too far gone? Budget for the project is sunk into piston, rings, bearing, seals... not sure I have any more room for a cylinder unless I go aftermarket

I don't know. But it doesn't look good. I'd say that's what they call scored.

And kind of looks like the chrome is coming off the cylinder where it looks kind of splotchy.

I guess anything's possible though. You might could make some kind of cylinder hone out of a wooden rod if you had a lathe to get it to just the right diameter, and then glue some emory cloth around it. If you know how to make a cross-hatch. Or maybe there's a really small bead type cylinder hone available.

But although I have an idea what to look for in a saw, I don't really have enough knowledge of parts acquisition to be much help any further.

 

[1Alpha1]

Anyone still use a cylinder hone any more? I had a set of three some years ago. No idea as to how they disappeared.

 

[HarleyT]

Keep buffing with the emory clotth until it all looks smooth, and wash, and install the new piston.

Keep buffing.

 

[cuinrearview]

If it doesn't clean up PM me, I've got a good OEM one at aftermarket price.

 

[lone wolf]

If it doesn't clean up PM me, I've got a good OEM one at aftermarket price.

That's the best fix right here!

 

[liquidskin]

Keep buffing with the emory clotth until it all looks smooth, and wash, and install the new piston.

Keep buffing.

By hand would work alright? I have a drill, but nothing like a rotary tool. I read the "Mastermind" thread on here which is helpful, but I really dont want to spend on a new tool.

 

[HarleyT]

I just sit down at the computer, buff, drink beer, stir up some chit here, buff, drink, repeat, Keep going until until the cylinder wall is nice, and everyone here hates me....
It is a win, win .......... WIN!!!

 

[cuinrearview]

Some will only do it by hand.

 

[liquidskin]

Some will only do it by hand.

Sounds good, Ill join that camp then - if not for principal, then necessity.

 

[HarleyT]

Yeah, it takes a lot of buffing. Just keep at it..

 

[cuinrearview]

You should take the intake boot off while doing what you're doing to avoid ripping it. Plus it's more nooks for crap to fall into.

 

[dmb2613]

It will take to dark o clock next Monday by hand lol

 

[cuinrearview]

Anyone still use a cylinder hone any more? I had a set of three some years ago. No idea as to how they disappeared.

Hones are not recommended. They can damage the port edges. This cylinder, with the open transfers, is a perfect example why.

 

[cuinrearview]

It will take to dark o clock next Monday by hand lol

I've needlessly lost some plating in the past using the powered method. It was in an area where it wouldn't matter, but I understand the hand sand camp's argument.

 

[liquidskin]

Used 3 grits of Emory cloth for about an hour tonight while watching some TV. Some inprovent