YM 2210B Valve Timing Off???

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pxmntws
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Re: YM 2210B Valve Timing Off???

Postby pxmntws » Fri Sep 23, 2016 8:42 am

First off I never claimed to be smart, The tractor was not running all that well which I attributed to the leaking head gasket and seemed like there was a lot of blow by but I never had a problem with starting it, I live in Arizona cold temps are not a problem. Removing the head takes about 30 minutes not a big deal as I only have bare essentials back on the tractor until I here it fire up. I received a service manual today and will remove pistons and check tolerances and at least install new rings.

Thanks again for all the replies. Tom.

pxmntws
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Re: YM 2210B Valve Timing Off???

Postby pxmntws » Sun Oct 02, 2016 8:29 pm

Well took the tractor apart again including pistons I found they were definitely bad, so I honed cylinder walls replaced pistons, rings, rod bearings, and so forth. Now the I have a new problem, tractor fires right up runs perfect for about one minute at 1000 RPMs and then starts to labor I am afraid piston are expanding in cylinder so I turn it off. Wait 30 minutes and start again same thing. Any suggestions do I need to take this thing apart again.

Thanks in advance.

winston
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Re: YM 2210B Valve Timing Off???

Postby winston » Mon Oct 03, 2016 4:20 am

Wondering if after the 30 minute run if you were to kill the tractor. Then pull compression release and engage starter. will the tractor spin over freely? This should indicate binding.

Did you check any clearances with new parts? Did new pistons seem to fit the bore ok?

pxmntws
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Re: YM 2210B Valve Timing Off???

Postby pxmntws » Mon Oct 03, 2016 9:18 am

I started it again this morning let it run until started laboring takes a little longer each time? Immediately after I killed it I pulled the compression release and will not turn over. So I will try this one more time. Any suggestions would be appreciated.

Thanks for your help Winston.

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Re: YM 2210B Valve Timing Off???

Postby Aaron » Mon Oct 03, 2016 9:27 am

Something is very wrong and I'm afraid the more you run it the worse it is going to be to repair. Does the tractor build good oil pressure?

pxmntws
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Re: YM 2210B Valve Timing Off???

Postby pxmntws » Mon Oct 03, 2016 10:16 am

Yes oil pressure is good, I drove tractor back into shop and will take it back apart again and buy gage to measure the bore accurately. The old piston measures 3.524 using a caliper to measure. I guess this is an undersized piston and liner is undersized as well? What do you think.

Thanks all.

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Re: YM 2210B Valve Timing Off???

Postby Aaron » Mon Oct 03, 2016 10:39 am

They don't make undersized pistons or liners. On models without replaceable liners you can get oversized pistons & rings but on models with liners it is standard or nothing (because it is cheaper to just replace a liner than go to a machine shop). When you take it back apart it will be obvious where the binding was taking place and then we can go from there.

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Re: YM 2210B Valve Timing Off???

Postby pxmntws » Mon Oct 03, 2016 11:11 am

Thanks for the information, I guess I will look at rod caps first.

winston
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Re: YM 2210B Valve Timing Off???

Postby winston » Mon Oct 03, 2016 2:13 pm

pxmntws wrote:Thanks for the information, I guess I will look at rod caps first.


Won't hurt anything but I doubt that is the problem. Certainly worth checking before pulling the head.

pxmntws
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Re: YM 2210B Valve Timing Off???

Postby pxmntws » Mon Oct 10, 2016 1:27 pm

Well I disassembled again found no smoking gun please see attached pictures. Any help or suggestions would be greatly appreciated.
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Aaron
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Re: YM 2210B Valve Timing Off???

Postby Aaron » Mon Oct 10, 2016 1:54 pm

What does your crank look like? That rod bearing has some nasty grooves in it. I would say that is where the binding is coming from.
Good bearing failure analysis link below.
http://www.studebaker-info.org/tech/Bea ... -3-402.pdf

winston
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Re: YM 2210B Valve Timing Off???

Postby winston » Mon Oct 10, 2016 2:02 pm

I see no evidence of siezing although not sure what I am seeing on the rod bearing but here are some things you might check.

Take the rings off piston and put in bore and check end gap. I don't know what your specs are but the 2000 (2tr20 little smaller 2 cylinder) ring gaps are .0118-.0197".

Piston skirt to cylinder is .0043-.0068".

Rod brgs. .0014-.0037"

Your 2210 may be a little different but something to check. Sure don't think your clearances should be any tighter.

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Re: YM 2210B Valve Timing Off???

Postby Aaron » Mon Oct 10, 2016 2:11 pm

Maybe I'm not seeing this right but are those little snowballs of bearing material? Hard to tell I guess but they look like they are protruding from the surface.

2210.JPG
2210.JPG (107.75 KiB) Viewed 3247 times

winston
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Re: YM 2210B Valve Timing Off???

Postby winston » Mon Oct 10, 2016 5:23 pm


Norm
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Re: YM 2210B Valve Timing Off???

Postby Norm » Mon Oct 10, 2016 7:21 pm

Are you checking the engine to turn freely with bare crankshaft then with each rod cap installed? Did you keep rod caps in original orientation and with same rod?


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