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Minneapolis Moline Tractors Discussion Forum
Show Parts for Model:

Re: GE5002 Pistons

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Charlie Bilerx

10-16-2012 22:08:25
64.201.85.43



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molinegb,
I am a bit confused. The LE engine is from a GTA. Those GE5002 pistons are from a GT tractor with a GE engine. Getting exact match rings is going to be a matter of finding an old set. My book tells me that your compression rings are 3/16" and the oil rings are 1/4". The side clearance hopefully falls between 0.0015" and 0.003" on the compression and 0.001" to 0.1125" for the oil ring.

Ordering a new set of rings to exactly match those pistons could cost some money. Getting extra rings becomes a matter of begging as no one wants to make custom sets up any more. I order piston rings daily and sometimes I order two sets of rings to get what I need. Two sets normally are cheaper than ordering extra rings. You could just toss in some of the old rings to fill in. I used to do that too.

The reason they used two oil rings is because the one piece cast oil rings just sucked. The grade twenty compression rings were not much better. They ate the cylinder walls at a fierce rate. My advice is to call around for some aluminum pistons. For me; tossing iron pistons generally is the lowest cost alternative. Aside from EE pistons for an R; Moline pistons are not that hard to come by.
Happy motoring.
Charlie at
Moline Parts

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molinegb

10-17-2012 12:13:52
67.201.136.21



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 Re: GE5002 Pistons in reply to Charlie Bilerx, 10-16-2012 22:08:25  
I always get LE and Ge motors mixed up. It is open flywheel 1930 21-32/FTA motor. Blocks and pistons had at one time been upgraded from the original 4 1/2 setup to 4 5/8. Tractor had been sitting for 40-50 years in a pasture. No can over exhaust and no hood. Pulled motor apart and found it had been rebuilt. Pressed out pistons easily. Cleaned bore and found no ridge or severe pits. Had several pistons out of GT's but GE2's were is best condition. I checked some NOS rings that I had. Found 5-3/16" compression rings,1- 1/4" oil ring and 4- scrapers.Salvaged remaining rings from GE2 pistons. I've been looking for blocks and pistons for some time. I now have enough parts to assemble my next project. 1938 GT
Thanks for info.

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