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Aluminum John Deere D Pistons

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Donny-B

12-01-2002 15:19:10




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I am in the process of restoring a 47 D and need to purchase a set of oversize pistons. There are a few dealers selling new aluminum pistons/pins/rings for the Ds but for about $900 a set I would like some input from guys who have used them. Is there any problems in using aluminum pistons in a D? Must I run only gas? Must I change the Kerosene manifold? Who is the best dealer to purchase from? Thanks in advance!

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Gman

12-01-2002 16:33:23




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 Re: Aluminum John Deere D Pistons in reply to Donny-B, 12-01-2002 15:19:10  
Donny let me ask you a question,why do you want to put alum. pistons in a "D" are you building a puller if not 900 bucks is alot of money,verses cleaning up the cast iron pistons and sleeving to fit block, engine will run smoother with cast iron pistons. I;m currently restoring a W engine which is a D with no wheels and I will bore block and sleeve it back to fit the cast iron (high Altitude) pistons thats in it. Gmans two cents

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Donny-B

12-01-2002 18:49:11




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 Re: Re: Aluminum John Deere D Pistons in reply to Gman, 12-01-2002 16:33:23  
Gman, My block is a rusted +.045 and needs bored. The machine shops around here (PA.) want $1000 to bore,sleeve and re-bore a D block. I have a good set of cast pistons (+.045) that I could use but for the same money I can have the block bored +.090 or +.125 and buy new pistons. I tried to locate a standard bore block but most everyone has oversize. I have had some parts brokers wanting to sell me a "worn standard" block but could not say for certain if it would clean-up at +.045 or if it had any cracks. It seems most cost effective to have the my block bored (for about $250) and buy new pistons. This tractor is not going to work fields. It will be used mainly for putting around tractor shows and may pull in stock classes at the county fair. Any suggestions will be appreciated.

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Clooney

12-01-2002 19:10:49




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 Re: Re: Re: Aluminum John Deere D Pistons in reply to Donny-B, 12-01-2002 18:49:11  
Donny-B, let us know how you come out with that piston project. In the past I have always just sleeved those old D's & used the production removed pistons like G-man has suggested. But as you have found out the cost to sleeve is getting really high [I think there is only one or two companies left that are supplying sleeves that will fit the D bore]. I have to send those D's out as my mill doesn't have enough plunge on the quill to do a D. With the cost of sleeves & the double boring I will probably go the aluminum piston route on the next one. ~If you can find some low compression pistons you will still be able to burn kerosene, but about all I have seen [I haven't looked at them all though] is higher compression pistons. Keep us [the board] posted on how your search is doing & what you end up with. If you go the high compression route you can keep the stock all-fuel manifold but will see a power gain with a cold manifold. You can even buy a dual exhaust pipe manifold & if not being original doesn't bother you they sound real good & look quite good when installed....

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