Reusing rings on a c123

[SemerodFarm70]

I’m rebuilding the motor on my 51 super c as part of the restoration because it had rod knock. The crank, head, rods, and flywheel are all machined and ready to go, but I’ve run into a dead end with the pistons, the rings more specifically. The pistons and sleeves are perfect looking, no scores at all and the sleeves have visible crosshatching still so I figure I’ll reuse them and save some money as the tractor didn’t smoke and fired right up besides the knocking. Anyways the pistons and sleeves were definitely replaced at one point as they are the 3 3/16 ones with 3 rings (370147r1 piston). I found part number for the rings but I can’t find them anywhere. What I’m asking is if there are any important steps to reusing old rings or what to look for because I think the rings look visibly good. I’ll see if I can find a spec on ring gap tmrw I guess. Just wondering since I don’t have the most motor experience ever lol.

 

[Janicholson]

I’m rebuilding the motor on my 51 super c as part of the restoration because it had rod knock. The crank, head, rods, and flywheel are all machined and ready to go, but I’ve run into a dead end with the pistons, the rings more specifically. The pistons and sleeves are perfect looking, no scores at all and the sleeves have visible crosshatching still so I figure I’ll reuse them and save some money as the tractor didn’t smoke and fired right up besides the knocking. Anyways the pistons and sleeves were definitely replaced at one point as they are the 3 3/16 ones with 3 rings (370147r1 piston). I found part number for the rings but I can’t find them anywhere. What I’m asking is if there are any important steps to reusing old rings or what to look for because I think the rings look visibly good. I’ll see if I can find a spec on ring gap tmrw I guess. Just wondering since I don’t have the most motor experience ever lol.

.006" per inch piston diameter is considered reasonable. .008 is OK. use some 350 grit silicon carbide on the wear edges to allow them to seat in (if within spec. just buff them dull, no material removal. Stager the gaps around the circumference. Jim

 

[SemerodFarm70]

Thanks for the help, will do. Logan

 

[scootergmc]

I think you could get away with reusing them but did you see these: https://www.partsasap.com/piston-ring-set-31875-bore-4-cylinder-128884.html

I'm sure they're available elsewhere too.

 

[rustred]

I’m rebuilding the motor on my 51 super c as part of the restoration because it had rod knock. The crank, head, rods, and flywheel are all machined and ready to go, but I’ve run into a dead end with the pistons, the rings more specifically. The pistons and sleeves are perfect looking, no scores at all and the sleeves have visible crosshatching still so I figure I’ll reuse them and save some money as the tractor didn’t smoke and fired right up besides the knocking. Anyways the pistons and sleeves were definitely replaced at one point as they are the 3 3/16 ones with 3 rings (370147r1 piston). I found part number for the rings but I can’t find them anywhere. What I’m asking is if there are any important steps to reusing old rings or what to look for because I think the rings look visibly good. I’ll see if I can find a spec on ring gap tmrw I guess. Just wondering since I don’t have the most motor experience ever lol.

The spec is on any engine is to have .003-.004 for every inch of cylinder bore. So set them in the sleeve and measure the ring end gap. Anything over .012 is ring wear. If you have .020 don’t use them rings they are done. And of course do this at the bottom of the sleeve where no wear takes place or right at the very top above ring travel.

 

[rustred]

And for what u have already done to the engine reusing old rings makes no sense. Rings are not that hard to get.

 

[showcrop]

And for what u have already done to the engine reusing old rings makes no sense. Rings are not that hard to get.

He states: "I found the part number for the rings but I can’t find them anywhere". Maybe you could help him out?

 

[Dave BN]

Did you check this site for rings? They have quite a selection.
Dave

 

[560Dennis]

From resource in upper header an in-depth article that will be helpful to make a decision . Eliminate costly redos .

https://forums.yesterdaystractors.com/pages/artint10/

 

[560Dennis]

Suggest the oil pump be looked at , cleaned, replaced shaft keys, shaft . new gasket from CaseIh that the correct thickness ,measu and correct the aluminum bottom plate, ,they wraped

Case IH SUPER C - FARMALL TRACTOR(01/51 - 12/53) Parts Diagrams

Case IH Parts Catalog Lookup. Buy Case IH Parts Online & Save!

www.messicks.com

also suggest the the block block and all moving components and oil passag be cleaned to remove all metal contamination From engine failure.

 

[Oregon Tractor Jack]

You should spend the time to take a serious look at the oil pump. The bottom plate on those pumps are cast aluminum. They will have wear groves from the pump gears and they warp. There are specs for the gear to plate tolerances and you should buy a new bottom plate gasket from case/IH. All the after market gaskets are too thick. Use the thinnest plastigauge you can find for this. I take the bottom plate and "true" it with sand paper and flat piece of steel or float glass. The last one I did on a float glass and now the pressure almost will almost max out the gauge. No point in doing a rebuild with out first looking and the oil pump.

OTJ

 

[kencombs]

several sellers on ebay have them

 

[SemerodFarm70]

To the people sending me the links the pictures look wrong and I’ve never ordered on partasap before idk how legit they are. And yes I’m aware of the oil pump I’ve sanded the cover flat and checked clearance but I’m not sure what that has to do with piston rings lol. I said I’m rebuilding it not just replacing rings.

 

[Janicholson]

To the people sending me the links the pictures look wrong and I’ve never ordered on partasap before idk how legit they are. And yes I’m aware of the oil pump I’ve sanded the cover flat and checked clearance but I’m not sure what that has to do with piston rings lol. I said I’m rebuilding it not just replacing rings.

You are using a forum sponsored by PartsASAP. we live here!! We use their parts on our tractors. There are very few issues, and those are resolved quickly. Go ahead and purchase them. Jim

 

[SemerodFarm70]

Thanks Jim I’ll take a look at then rings tonight. The description matches what I need but the pictures don’t.

 

[rustred]

He states: "I found the part number for the rings but I can’t find them anywhere". Maybe you could help him out?

i am not an online person and buy nothing online. i use the phone and talk directly to a person, when i need parts.

 

[showcrop]

i am not an online person and buy nothing online. i use the phone and talk directly to a person, when i need parts.

perhaps you could give LSC123 that 'phone number.

 

[Duner Wi]

I’m rebuilding the motor on my 51 super c as part of the restoration because it had rod knock. The crank, head, rods, and flywheel are all machined and ready to go, but I’ve run into a dead end with the pistons, the rings more specifically. The pistons and sleeves are perfect looking, no scores at all and the sleeves have visible crosshatching still so I figure I’ll reuse them and save some money as the tractor didn’t smoke and fired right up besides the knocking. Anyways the pistons and sleeves were definitely replaced at one point as they are the 3 3/16 ones with 3 rings (370147r1 piston). I found part number for the rings but I can’t find them anywhere. What I’m asking is if there are any important steps to reusing old rings or what to look for because I think the rings look visibly good. I’ll see if I can find a spec on ring gap tmrw I guess. Just wondering since I don’t have the most motor experience ever lol.

Parts depot in Chilton WI has 1 set rings # available. Have your dealer order them.

 

[BarnyardEngineering]

Thanks Jim I’ll take a look at then rings tonight. The description matches what I need but the pictures don’t.

The site carries millions of different parts for thousands of different tractors. To have exact pictures of everything is impractical to say the least.

You just have to take a leap of faith sometimes.

 

[Absent Minded Farmer]

The site carries millions of different parts for thousands of different tractors. To have exact pictures of everything is impractical to say the least.

You just have to take a leap of faith sometimes.

Yes, quite common to use stock photos to represent similar parts.

That & many are too cheap to invest in a good, qualified product photographer.... such as myself.

Mike