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Re: 4010 Diesel

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David G

11-14-2012 12:27:47

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I would expect it to smoke more if the timing is slow. Poor cold starting is indicative of compression issues, did you grind valves or replace valves and seats.

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Texas Denny

11-14-2012 13:00:17

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 Re: 4010 Diesel in reply to David G, 11-14-2012 12:27:47  
We ground the valves. They were in very good condition and needed very little to clean them up. We did not check protrusion. It was a lot harder starting before the rebuild. With new sleeves and pistons, compression shouldn"t be an issue.

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11-14-2012 17:46:27

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 Re: 4010 Diesel in reply to Texas Denny, 11-14-2012 13:00:17  
If you drop both intake and exhaust valves each .020" you can lose 2 tenths point of compression ratio if valves have been ground before you can lose a half point compression ratio. I just redid head of 3020 and valves were recessed .100"+. when you go from 16 to 1 compression to 14.5 to 1 they start sorta hard. and if you did not check recesion you have no idea how good or bad they actually were. I have 4010 that we just "ground the valves" on . starts hard needs seats and valves but makes good power.

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David G

11-14-2012 15:24:34

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 Re: 4010 Diesel in reply to Texas Denny, 11-14-2012 13:00:17  
I would say if it is better starting now, you are ahead. They have never been a good cold starter.

How cold can it be and start without plugging in?

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Texas Denny

11-14-2012 18:49:47

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 Re: 4010 Diesel in reply to David G, 11-14-2012 15:24:34  
I started it last weekend. It was in the 50"s. I have an Allis Diesel that starts fine until it hits 40. This one is not as good.

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11-14-2012 14:21:40

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 Re: 4010 Diesel in reply to Texas Denny, 11-14-2012 13:00:17  
I agree with the posting below it is your valves.You can not just grind the valves in a Deere tractor they have to be set to specs preferable to the minium side or they will not start.You have lowered the compressionand even a new engine kit will not make up for it.Years ago we overhauled a 2510 for a neighbor who took the head to an auto parts store where they ground the valves and it needed either to start anytime it was below 40 degrees.Two years latter we pulled the head and took to a shop who did it right and the tractor started great.

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