Cylinder Sleeve

u00bgg2 · Apr 23, 2012

Hello, I recently rebuilt the motor on my 450 gas engine. The motor was seized and after much work and some serious leverage I was able to get the pistons out. When the pistons came out, two of the sleeves came out with them. After getting it all apart and put back together I noticed while under the tractor that the bottom of one of the sleeves has a hair line crack. I rotated the crank and is well below the contact point of piston during travel.

My question is an opinion and experience question, do I have to pull it and replace it? Based on the location my personal opinion is that it is likely to not travel or get any worse and since it is not in the path of the piston travel it should be fine. i would rather have the opinion of those with more experience then relying on perhaps my flawed intuition.

I appreciate your time,
Brian

rustyfarmall · Apr 24, 2012

(quoted from post at 18:08:55 04/23/12) Hello, I recently rebuilt the motor on my 450 gas engine. The motor was seized and after much work and some serious leverage I was able to get the pistons out. When the pistons came out, two of the sleeves came out with them. After getting it all apart and put back together I noticed while under the tractor that the bottom of one of the sleeves has a hair line crack. I rotated the crank and is well below the contact point of piston during travel.

My question is an opinion and experience question, do I have to pull it and replace it? Based on the location my personal opinion is that it is likely to not travel or get any worse and since it is not in the path of the piston travel it should be fine. i would rather have the opinion of those with more experience then relying on perhaps my flawed intuition.

I appreciate your time,
Brian

A cracked sleeve will never heal itself. It will only get worse. You're already into it this far, might as well do it right and replace all of the sleeves, and pistons also.

rustred · Apr 26, 2012

yes, replace sleeve if its cracked. i have replaced dry sleeves on a block with a hair line crack at top and all is well.

JRSutton · Apr 27, 2012

Hard to say without seeing it -

Being in the piston travel area is one thing - but what about coolant seeping in?

Personally - to me a crack in anything is always a bad thing - I'd get a new one with a new set of rings, swap it out, and be done worrying about it.

mkirsch · Apr 27, 2012

It's a dry sleeve engine so theoretically the sleeve has nothing to do with keeping the coolant out of the cylinder.

Cylinder Sleeve

u00bgg2

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rustyfarmall

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rustred

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JRSutton

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mkirsch

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