Re: 966 is a smoker

Posted by thejdman01 on January 07, 2005 at 12:20:44 from (152.163.101.13):

In Reply to: Re: 966 is a smoker posted by Allan in NE on January 07, 2005 at 11:22:30:

blue smoke = oil burning
white smoke =unburnt fuel due to a lack of heat (or compression
black smoke=unburnt fuel due to lack of air (turbo restricted air cleaner or turned up pump whatever it is its not enough air for the amt of fuel. just because it starts well doesnt mean yourr rings are fine. the bottom ring is considered an old control ring used to scrape the oil off the cylinder walls. the top 2 rings are considered compression rings. you may very well be getting compression from your top 2 rings but your oil control rings might not be scraping the oil off and thats where your getting the blueish smoke. also could be worn valve guids very unlikely but possible if oils running down to the valves. 856's were know for having extra brittle oil control rings. not a real case or ih fan so dont know about other series and their problems. you say its a bit rough there are also holes in the piston that let oil run down the inside of the piston to cool the piston it runs down the inside of the skirt. possibly your rings could be ok but carbon buildup in those little holes wont let the oil run back down so you are also getting exess built up on the walls. i have rarely but have seen the holes in the piston get plugged w/gunk if the tracoor is neglected. blue is oil burning. white is just unburnt fuel. if the blue goes away after its warm that pry means rings as heat expands and it jsut means when the mtoors cold and rings contracted they arent workign well when it warms up if it goes away i woudlnt worry about doing anythign about it. remember rings pistons and cylider liners and blocks are made out of different composition of metals and expand and heat up at different rates make sure to warm up anything well when its cold esp when you dont plug it in a big diesel block even at 0 may take 15-20 min to get heat to it. also i may note while im ramblin when idling it after about 1-2 min dont let the tractor warm up at idle unless you have great oil pressure at idle. most tractors i have seen that are ih dont build much oil pressure at idle (20 psi or so) and if you kick it up a tad over idle yes i do mean a tad over idle im not saying wide open or fast just bump it off of idle and most ive seen if you bump it off idle will climp to around 35-40 that helps make sure you get oil up to the turbo and top end. my 2 cents hope it helps

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