Metal shavings in rod bearings?

Ulysses Hammen · Jul 31, 2010

I took one of the rod bearings off to do a visual inspection to determine if I should do a complete rebuild. I was surpised to see small metal shaving worked it's way to rod bearings, it is now embedded into the bearings and left some gouges on the crank shaft. How is that possible? I am going to split the to20, it will be my first time to rebuild an engine. Fun fun!!

Bob (Aust) · Aug 1, 2010

You must identify where the metal shavings came from. Are they steel or alloy - if they gouged the crankshaft journal I suspect steel. My [u:1379236c8c]guess[/u:1379236c8c] they [u:1379236c8c]may[/u:1379236c8c] be from the timing/governor area at the front of the engine, but I am not familiar with the Continental engine.

[i:1379236c8c]"...left some gouges on the crank shaft..."[/i:1379236c8c] You may need advice whether they are minor scratches and can be blended out or whether you will need to have the crank shaft journals ground.

Bob in Oz
'53 TEA20

Ulysses Hammen · Aug 1, 2010

(quoted from post at 02:10:31 08/01/10) You must identify where the metal shavings came from. Are they steel or alloy - if they gouged the crankshaft journal I suspect steel. My [u:93d7e30b9c]guess[/u:93d7e30b9c] they [u:93d7e30b9c]may[/u:93d7e30b9c] be from the timing/governor area at the front of the engine, but I am not familiar with the Continental engine.

[i:93d7e30b9c]"...left some gouges on the crank shaft..."[/i:93d7e30b9c] You may need advice whether they are minor scratches and can be blended out or whether you will need to have the crank shaft journals ground.

Bob in Oz
'53 TEA20

I do know the metal screen mesh from the oil pan was damaged and some metals from it was missing, so maybe it came from that. However, I am going to do a complete rebuild, so everything will be checked out.

Tony in Mass. · Aug 1, 2010

Don't bang your head on the wall too much over this. Yours like all of ours is atleast 55 years old, with more than one owner. This bearing might have spun long ago, someone might have filed an odd bearing to make this one fit, lots of fingers in the pie over the decades. If you have the engine appart this far, get a rebuild kit, send block and crank to machine shop- oh! mike everything first, before you buy any big ticket items- the crank might not have any meat left to turn down. Which might be why your crank is scored. And yes, the governor might have shreaded itself and ended up in the bearing. Is the tractor in half, and did you look at the gov and thrust washers etc,, other sheet metal stuff up front? Keep us informed how this goes, good luck!

Tony in Mass. · Aug 1, 2010

Gosh, I didn't read down far enough to your return to Bob, so when you strip it down, you will know the condition of the gov. pieces, and have the time to find a new sump screen. But to avoid an expensive disappointment, you need to take the big pieces to a machine shop to have magnafluxed and miked before you go any further, I came very close to throwing away mucho dollars by 'assuming' the block, crank and head were usable, wow. I won't do that again. Sorry for repeating myself! BTW, take lots of pics as you tear down, something to refer back to putting it all back together- good luck

Anonymous-0 · Aug 1, 2010

this is normal. any defects in crank- it must be reground.

Metal shavings in rod bearings?

Ulysses Hammen

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Bob (Aust)

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Ulysses Hammen

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Tony in Mass.

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Tony in Mass.

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Anonymous-0

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