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What next? Help with Super C engine rebuild

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BillWV

09-29-2004 16:58:44




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YTers,

Finally got started on finding the smoking/oil use problem on my Super C.

Took the head off this evening. The cylinders don't appear worn (very little or no lip at the top of the bore); they measure 3-1/4". The pistons have the IH logo on them.

Everything is carboned up. Two of the exhaust valves don't appear to be closing.

It was smoking pretty bad and using oil. I suspect oil was leaking down past the valve guides, but would that account for the oil control problem?

How do I check the valve/valve guide clearance? And, should I go ahead and pull the pistons out to check the rings?

Thanks,
Bill

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gauger

09-30-2004 05:56:03




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 Re: What next? Help with Super C engine rebuild in reply to BillWV, 09-29-2004 16:58:44  
I would bet good money that IH does not manufacture the sleeve and piston sets for the older tractors. I think the OEM quality argument vs. aftermarket becomes more irrelevant all the time. In other words, the "IH" parts are not always worth the extra money which in the case of sleeve sets is a considerable amount.



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El Toro

09-30-2004 04:17:10




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 Re: What next? Help with Super C engine rebuild in reply to BillWV, 09-29-2004 16:58:44  
Hi Bill, I think you should tear the engine down
and measure the sleeve bore for wear and taper.
Measure rod and main bearing journals for wear too. Doing it right now will save a lot of headaches later on. I bought my sleeve and piston kit from IH and it was the 3.25" bore for a Farmall A. Hal



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Peabody

09-29-2004 18:07:13




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 Re: What next? Help with Super C engine rebuild in reply to BillWV, 09-29-2004 16:58:44  
Before I dropped pistons, and since you have the head pulled, I think I would go ahead and have the head reworked ($75-$150 in Central Alabama)and see if that doesn"t solve the problem. Instead of going into too much detail here, do an archive search on valve clearance setting, it has been discussed many times, and really easy to do. You probably ought to go ahead and invest $25 in a shop manual that will cover most of the servicing issues you are going to run up against. Good luck and keep us informed of your progress. Luv my 52 Super C!

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BillWV

09-29-2004 19:43:13




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 I should clarify... in reply to Peabody, 09-29-2004 18:07:13  
Two of the exhaust valves don't appear to be closing...with the head sitting on the bench. I was thinking more of carbon between the valve and seat rather than valve clearance.
I'm going to remove the valves and have the head hot-tanked; it is a mess looking in the exhaust ports.
Thanks,
Bill



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gene

09-29-2004 22:31:29




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 Re: I should clarify... in reply to BillWV, 09-29-2004 19:43:13  
The valve stem is stuck in the valve guide. I don't think carbon buildup would prevent the valves from closing. Soak the stuck valve stems with penetrating oil for several days. Rap lightly on the stem head then soak again. Continue until the valve frees up.

Oil can get into the cylinder past the valve stem. But, I don't think the valve stem - guide clearence is all of the problem. You need a set of micrometers - measure the diameter of the stem and the bore of the valve guide. Couldn't find the clearence but somewhere around .001.

You have the head off. I think I would go ahead and do an in block overhaul. Pull the pistons, clean up the cylinders, and rering the pistons. Check the mains and rod bearings.

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justin w

09-29-2004 17:28:39




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 Re: What next? Help with Super C engine rebuild in reply to BillWV, 09-29-2004 16:58:44  
Ih did not produce a 3-1/4" piston & sleeve set for the super C. Only the aftermarket suppliers did this. The largest IH piston & sleeve set produced was 3-3/16".



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BillWV

09-29-2004 19:39:19




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 Re: What next? Help with Super C engine rebuild in reply to justin w, 09-29-2004 17:28:39  
I was looking at the pistons again after my first post, and they don't, in fact, have the IH logo. Don't know what I was thinking about. It is 3-1/4" bore, though.
Thanks,
Bill



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