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Replacement Engine possibilities for 4020 gas

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Jerry Young

02-10-2003 10:57:21




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I would like to replace a badly worn gas motor. Should I overhaul, buy reman, replace with diesel (used) motor or other? What cost and work would be associated with buying a used diesel motor from a combine and installing?




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WTW

02-11-2003 06:56:38




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 Re: Replacement Engine possibilities for 4020 gas in reply to Jerry Young, 02-10-2003 10:57:21  
Jerry, First I want to clarify that combines Do NOT have lighter blocks in them verses a tractor block. If the block from the combine has a casting number that was used in a tractor it is the same part. The rest of BW's comments are true. I too have changed out many of these (dozens) and would not say it is the way to go or not. If your tractor has some life in it and you plan on keeping it to use it would be worth considering. What I am saying is if the transmission and hydraulic system are tired in it, it would be more feasible to go buy yourself a good diesel tractor ready to go do some work. But if you have a fairly low houred (clean) gas tractor with a tired engine I would not think twice about doing it. It all what your needs, availability of parts and skills are. If you do decide you want to pursue it more, I do have a late model 4020 diesel engine I would sell as well as a freshly overhauled gas engine I took out for a diesel repower. There is options that you can make to keep the conversion cost down and still have a good working tractor when done. Email me if you want more information on converting. As far as the diesel over the gas you will not be sorry you made the change. Good Luck with whatever route you decide to take. Dave W.

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Brokenwrench

02-10-2003 12:43:37




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 Re: Replacement Engine possibilities for 4020 gas in reply to Jerry Young, 02-10-2003 10:57:21  
Your quickest and cheapest option would be to overhaul the gas engine. You can probably overhaul yours for about $2500. if you do the work yourself except for the machine work on the head.A combine engine has a thinner block, usually a tin oil pan,which will have to be changed to the cast iron pan so it will bolt up to the bell housing, you will also have to add a second battery box, two new batteries, and do some rewiring. You will also need throttle linkage, and possibly change the waterpump,depending on what model combine it came out of. I've done 3or 4 of these, its not that hard a job, just round up all the needed parts and gaskets ahead of time, and a trip to a salvage yard to get the necessary linkages and brackets, fuel lines etc. If you do switch to diesel be sure to flush out the fuel tank and fuel lines. Another option would be to buy a running engine out of a diesel 4020 from a salvage yard complete with all the nesessary parts.

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