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Farmall & IHC Tractors Discussion Forum
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H spun bearing

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KansasBri

06-15-2006 07:26:22




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I think I've learned, with some help from you guys out there, that my (just purchased) H has spun a bearing. Now for the dumb questions.

Is it common for that to happen, and not hurt the crank? It seems to not have, still smooth(ish) and not blue.

Would that cause a helluva bang when running? The rod was pretty lose from the crank, wiggled by hand. That cylinder had much more build up at top 1/4 inch of cyl. than the others.

And off-topic, just bought, must've sat. When I drained the oil, got what looked like fresh green antifreeze, then brown water, then greyish oil. Seems like I've heard this can happen from sitting and not necesarily from a cracked head/block? Have pulled the head and pistons, all looks ok to my amature eye.

Thanks in advance for all your help!

Bri

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old

06-15-2006 10:22:36




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 Re: H spun bearing in reply to KansasBri, 06-15-2006 07:26:22  
As the others have said. Any time you have a spun bearing you most like have an out of round journal and you can't see that with your eyes. From what you say it sounds like its rebuild time for that engine, if you want to have a good tractor that is



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KansasBri

06-15-2006 15:44:06




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 Re: H spun bearing in reply to old, 06-15-2006 10:22:36  
Well crud. Was hopign I could just replace that bearing and be on my way. Anyone have an approximate cost for all this?

Shoulda made my handle PoorKansasBri!



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El Toro

06-16-2006 03:44:02




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 Re: H spun bearing in reply to KansasBri, 06-15-2006 15:44:06  
You can buy a sleeve and piston kit from this forum for about $350.00. You could check with your local auto machine shop on the cost of any machining. Crankshaft if it needs to be ground,
valve job, cam bearings and degreasing block. They can supply all your rod and main bearings too. They should install your new pistons to the old rods and you probably need new bushings
in the old rods. Very easy to put $1000.00 or more in these engines. Hal

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old

06-15-2006 17:32:56




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 Re: H spun bearing in reply to KansasBri, 06-15-2006 15:44:06  
It will depend on just how far you want to go with it. A total rebuild could cost around $800-2000 depending on what all you do ans what all it needs. You might get by with pulling the crank and haveing it and the rod checked and then just have to replace that bearing or you could end up haveing to have the crank turned and then replace all the bearings.

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Phil Auten (TX)

06-15-2006 10:18:45




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 Re: H spun bearing in reply to KansasBri, 06-15-2006 07:26:22  
I vote with the other two responders. Disassemble the engine and take all the parts to a machine shop (one that is familiar with tractor engines, if possible). Be sure to take all the bolts with you so they can get "hot tanked" right along with the block and head. This will clean out all of the passages in the block/head of built up crud, including the water passages. Make sure the block and head are checked for cracks, usually by MagnaFluxing. Be prepared to go looking for a new head or block, as they do crack over 50 years of use and abuse. The crank should be checked for wear and roundness of all journals and possibly straightness. Have the machine shop install new cam bearings, they can do it much easier than you can. You may also want the shop to reassemble everything for you if you aren't comfortable using precision measuring tools and plastigauge to check rod and main bearing clearances. Last, but not least, keep asking questions here on this forum. If you run into problems, there is always someone here that has "been there, done that" before and they are usually willing to help out.

Phil

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El Toro

06-15-2006 09:10:59




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 Re: H spun bearing in reply to KansasBri, 06-15-2006 07:26:22  
I would pull that crankshaft and have it measured at your local auto machine shop. I would have that spun connecting rod inspected and the head magnafluxed. This would be good time to get the block degreased and new cam bearings installed.
It's like Jim has said, you pay now or later if you need to tear that engine down again. Hal



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Janicholson

06-15-2006 07:55:40




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 Re: H spun bearing in reply to KansasBri, 06-15-2006 07:26:22  
The leak of antifreeze can destroy bearings. The crank must be measured with suitable micrometers in multiple directions acrocc the width of the surface to assure success in replacement. Those measurements will also dictate the correct insert to use if it is found to be OK (doubtful). The engine should be checked for cracks (especially the head to assure success in repair). Good luck, do it right or pay three times. JimN

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