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JOHN DEERE G HEAD

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JIM MCCLAIN

09-05-2000 17:43:39




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I WAS WONDERING IF SOMEONE COULD TELL ME HOW I CAN IDENTIFY A HIGH COMPRESSION HEAD FROM A LOW COMPRESSION HEAD ON A JOHN DEERE G.




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Gman

09-06-2000 20:05:08




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 Re: JOHN DEERE G HEAD in reply to JIM MCCLAIN, 09-05-2000 17:43:39  
Jim I gave you some bad info on where Jerry lives it is Wichita,Kansas 1-316-838-1908. I went and got the book that time memory let me down on the last post. thanks Doug Later Gman



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WTW

09-06-2000 06:48:31




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 Re: JOHN DEERE G HEAD in reply to JIM MCCLAIN, 09-05-2000 17:43:39  
Jim, F-551-R is off a styled "G", F-486-R is off an Unstyled "G" late 1938-1942, F-49-R was used at the begining to late 1938. F-49-R will only fit the early blocks that have the small square water manifolds. F-486-R will fit both the later blocks.
To tell if your late (styled tractor block) has the flat head (F-486-R) on it, is look between the exhaust manifold and the water manifold. If it is the flat head (F-486-R) the manifolds will almost touch each other. If it has the original head on it (F-551-R) (Thick Head) on it you will be able to stick you finger between the water manifold and the exhaust manifold. Good Luck Dave W.

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[email protected]

09-05-2000 19:25:23




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 Re: JOHN DEERE G HEAD in reply to JIM MCCLAIN, 09-05-2000 17:43:39  
Jim a F-551 R is off a styled "G" and F-486-R is off an Unstyled "G" 1937-1942.there is another flat head the F-49-R but I understand they are thin around the valve seats. So the F-486-R would be the high compression head to look for,there is a Guy in Kansas that makes a "G" flat head with spark plugs in the head,Jerry's Machine Shop in Abilene Kansas and it's better than the John Deere ever thought about being but it's pricy and made for pullers (around 1500.oo bucks) see ya Gman

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DougS

09-06-2000 04:24:28




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 Re: Re: JOHN DEERE G HEAD in reply to [email protected], 09-05-2000 19:25:23  
Jerry lives in Wichita Kansas.



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