Honing cylinders with engine in place

PaulW_NJ · Jan 20, 2009

I'm rebuilding my 240U. I gauged the cylinders, and they're OK within specs, but I had two broken oil rings, and the compression rings are pretty worn out. I bought a set of rings, and plan to hone the cylinders and put it all back together (when it warms up a little), but I'm concerned fines and contamination will be running down into the crank bearings. I'm replacing all of the bearings anyway, but I'm worried about abrasive getting caught up where I might not see it.

I've heard it's important to cover up the crank, and bearings, but I not sure the best way to do so. I'd appreciate some good ideas of what works from those who have done this.

Thanks

Anonymous-0 · Jan 20, 2009

just get your self some rags and stuff them up over the crank.there is those oil absorbant pads for oil spills that should work good for that.you shouldnt have a whole lot of fluid flying around anyhow.just dont get the hone caught in the rags. remember clean cyls. with a white rag this way you know when there clean.very important to get all that grit out.

the tractor vet · Jan 20, 2009

Ya never get it all out don't care what ya do ya just do the best ya can as for putting rags or anything else in there myself i never did as you are going to clean and clean and clean myself the first cleaning is with a solvent then the rest are with hot water and a strong soap and here again ya clean and clean till the bore shows rust then it is as clean as your going to get compressed air and blow dry and blow around the mains after each cleaning wash the rods give the bore a light coat of oil and start putting it back together . This is a tractor engine not a race engine . Run it about 10 hours and change the oil and filter then run it for about thirty hours and do it again and it will be fine if ya did your part correctly .

Bob S. · Jan 21, 2009

Howdy
What the tractor vet said. Do not skip the soap and water, it seems like nothing else will get rid of that fine grit.
Bob S.

Anonymous-0 · Jan 21, 2009

i was just answering pauls question, and not going into detail on how to hone and clean cyls.if he dont want grit running into the oil galleries and main brgs. i told him what to do.yes i know everthing has to be spotless (and not going there) and i am sure paul does or he would not have asked the question.may as well do the honing outside with with dust blowing if its going to be washed anyhow.the white rag thing came from my instuctor over thirty years ago when i got my mech. licence.just giving my opinion of this situation and not causing any fights.

Owen Aaland · Jan 21, 2009

You will most likely be much better off if you remove the sleeves from the block. You will be able to do a much better job of cleaning the sleeves after honing and the other benefit will be having new seals between block and sleeve. Greatly reduces the chance of leaking as the sleeves may be disturbed by the honing and cleaning process if done in the block.

Wayne in MN · Jan 21, 2009

If you are going to hone the cylinders, squirt new engine oil on a white rag and wipe the cylinder until the rag no longer shows gray color indicating honing residue. Turn the rag to a fresh surface as you proceed.
The underside of the engine will need cleaning also; I use a air suction spray gun & spray down the underside with cleaning solvent (do not use gasoline, it will not "float" the particles away) such as diesel fuel or mineral spirits.

PaulW_NJ · Jan 22, 2009

I appreciate all of the replies and suggestions. Now I have an idea of how to proceed. I'll be working in an unheated barn, so it may be awhile yet before I get going on this. Thanks again.

Honing cylinders with engine in place

PaulW_NJ

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Anonymous-0

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the tractor vet

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Bob S.

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Anonymous-0

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Owen Aaland

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Wayne in MN

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PaulW_NJ

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