John Deere 619 engine November 04, 2010 11:01AM
Trying to find cheapest and right combo to take big block deere to 640 cubic inches. I was told 466 jd rods but not pistons or liners to use and where to get them.Thanks for your help.
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Re: John Deere 619 engine November 05, 2010 03:51AM
im not real familiar with these engines but if i had to bet the suggestion was to use the 466 rod which probably has a smaller rod journal and offset grind the big block crank to add stroke to the small block journal size. a big block is 5in crank go to a 5.15 and you have a 637
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Re: John Deere 619 engine November 05, 2010 05:21AM
I would actually stick with the 531 block, or use that bore size (custom sleeve) in the 619 block if you really think there is that much more strength there (some do, others don't). The extra stroke (torque) will be worth more in a Hot/Super Farm class than the extra bore size (horsepower). Just my opinion of course.
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Re: John Deere 619 engine November 05, 2010 06:46AM
In the January 2005 Hook Magazine, Roger Marlin, illustrates with photos, the mating of series 40 and series 50 5.125 jd pistons with jd 466t rods. early style 40's are best used with the 6 degree tops 40 series small block rods, 50 series, 19 degree small block rods, 50 series, with both having to have the piston end enlarged to accomodate the oem 5.125 bushing. He discussed overboring the rod ends and offsetting the bushings to stroke as much as 3/16", as well as alternatives. The article itself, was discussing placing the deere piston and rod combinations in a ih 400 block, 661 cubes with a stock 466 crank!
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Re: John Deere 619 engine March 06, 2014 09:12AM
What is difference between 8630 and 8640 engine and why is it better ?
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Re: John Deere 619 engine March 06, 2014 09:33AM
I worked at Deere dealership in the late 70 and early 80's. Deere learned a lot with the 30 series tractors. After the 40 series were out for a while, there was a big change over for the 30 series. Started at the radiator cap and ended at the draw bar. Been to many years to tell you all that was done, but I know engines were gone though, complete over haul, 2 speeds, transmissions and maybe clutches. Then if you had trouble with the 40 series in the later years, you could get a complete 50 series engine only. So if you get an engine out of a 8640, you could be getting a 50 series. I don't remember how to tell you the difference between the 40 and 50's, maybe by serial numbers or engine numbers on the engine tag. Hope this helps.
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Re: John Deere 619 engine March 07, 2014 07:41AM
one oil pump cam driven one crank driven wont break end of cam so easy
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Re: John Deere 619 engine March 07, 2014 10:16AM
30 and 40 series block were both cam driven oil pump blocks. A 50 series or 10.1 block will get you the crank drive oil pump. I don't think there is a big difference between 30 and 40 series.
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Re: John Deere 619 engine March 08, 2014 07:54PM
Well all I wanted one for is some mild board plowing and mostly pto work on a 3-4 or 4x4 big square baler. It seems I can get an 8430 or 8630 fairly cheap. I have a 4430 bought new and love that styling.
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Re: John Deere 619 engine March 07, 2014 04:55AM
What is difference between 8630 and 8640 engine and why is it better ?
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Re: John Deere 619 engine February 13, 2024 06:20AM
Biggest thing is later 40 series had crank driven oil pump, 30 and early 40 series were cam driven oil pump.I believe the head bolt depth was deeper in the newer engines also compared to the 30 series.
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