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John Deere Tractors Discussion Forum
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john deere 301 white smoke

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bdr2431

02-18-2008 20:47:53




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I posted a message about my 301 puffing white smoke on feb 17. I have now noticed it is also blowing from vent tube coming out of valve cover. Could this be head gasket or rings? Not losing any water. If I check compression and it is low will it be the rings only. Should I just plan a full overhaul?




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green 5020

02-19-2008 16:07:27




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 Re: john deere 301 white smoke in reply to bdr2431, 02-18-2008 20:47:53  
I had a similar problem recently with my 5020. After an engine overhaul, with new injectors, engine was not running smooth, especially at mid-throttle, pulled injection pump off and had it rebuilt, runs like new. Like was stated, be sure to check valve adjustment.



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wilamayb

02-19-2008 04:14:37




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 Re: john deere 301 white smoke in reply to bdr2431, 02-18-2008 20:47:53  
It may be that you are only getting compression past the rings because the temperature has been so low in the combustion chamber that the rings have gotten oily and crusty. After you figure out why you are having problems you may need to give it a good working with load for several hours to get it cleared back up again.

Have you checked tappett clearance?



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bdr2431

02-19-2008 14:13:25




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 Re: john deere 301 white smoke in reply to wilamayb, 02-19-2008 04:14:37  
I have not checked tappett clearance but I need to. I had considered the possibility of a stuck valve but I still dont understand the differnce in all cylinders exhaust temp being different. I have purchased a compression gauge and adapter so I guess I will have to wait and start there. Head gasket wouldnt have anything to do with smoke coming out of vent would it?



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