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CAM.. GRIND IT OR LEAVE IT STOCK

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POPPIN 60

08-14-2001 19:08:54




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I HAVE A JOHN DEERE 60 I AM GETTING READY TO TAKE THE ENGINE APART IN AND AM WONDERING IF I SHOULD HAVE A CAM GROUND FOR IT. IT IS BORED .125 WITH M&W STYLE PISTONS. ANY HELP WOULD BE APPRICEATED.




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G Taylor

08-14-2001 20:42:37




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 Re: CAM.. GRIND IT OR LEAVE IT STOCK in reply to POPPIN 60, 08-14-2001 19:08:54  
Have Robert grind a cam & install a LP manifold with a dry airfilter conversion. A MSD ignition can compensate somewhat for the the side mounted spark plug. Don't mill the block or head, the late A or 60 will blow head gaskets if provoked.



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Mike Aylward

08-16-2001 15:18:51




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 Re: Re: CAM.. GRIND IT OR LEAVE IT STOCK in reply to G Taylor , 08-14-2001 20:42:37  
I would have to respectfully disagree somewhat about milling the head on your 60. I have a 60 that I pull that I had milled down to the combustion chamber. There is really no need to go any further because you will not gain anything compression-wise. The trick to holding a late A or 60 head gasket is in the way you torque them down, plus by using a bit of Permatex #3 on the outside vertical gasket rails. My 60 has over a 9:1 compression ratio and has held this gasket with no seepage whatsoever for over three years. Let me know if you want the full procedure that I do to these tractors. Don't want to be disagreeable here, just stating what has worked for me. Mike

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G Taylor

08-17-2001 10:26:12




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 Re: Re: Re: CAM.. GRIND IT OR LEAVE IT STOCK in reply to Mike Aylward, 08-16-2001 15:18:51  
I wouldn't mind getting refreshed on your 60 sealing secrets. We were probably over fancy sealing ours. Are you running a thermostat? The thermal shock during initial opening when the rad is full of cold water has probably caused more cracks,warping & blow gaskets that all other causes together. After drilling a 3/32 vent hole in the thermostat body & used modest warm up loads we haven't had any problems.

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Mike Aylward

08-17-2001 11:15:21




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 Re: Re: Re: Re: CAM.. GRIND IT OR LEAVE IT STOCK in reply to G Taylor , 08-17-2001 10:26:12  
My 60 is a '53 and has the thermostatic shutter. Basically it has no thermostat as most of these freeze open after getting dirty and rusty. A 3/32" hole is plenty big for a steam hole in a thermostat. This large of a hole effectively disables a thermostat. Usually all you need for a steam hole is a 1/32" hole, or the smallest you can get. It still relieves pressure but won't increase water flow noticeably. I'm not sure of the thermal shock theory as a late A without a thermostat will act this same way in leaking. As far as the tightening sequence on a late A or 60, I have always had good luck starting the first tightening at about 40-50 lbs., then going up 10 lbs. at a time until 150 is reached, then going over them at least one more time at 150 to check them again (sometimes you will gain a little here and there). Before doing this put some #3 Permatex on the outside vertical rails of both sides of the head gasket. Do not use this material anywhere else on the gasket. Do the torque sequence just mentioned and after the tractor is started and warmed up check the torque again and reset the valves. This should fix the problem as it has always worked well for me. Hope this helps. Mike

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