smoking 706

Sorry, if you thought this was going to be about an attractive swimsuit model or a 706 with a Colby-like restoration.
This fall with my mounted picker on my 706, gas engine, there were times at idle and not under load, the tractor was emitting an larger amount of exhaust from the lower breather pipe than I would deem normal-enough to see a bluish cloud around the picker. Yet there was nothing noticable when the tractor was in action or at higher rpms.
At first I thought the tractor was on fire or smoldering but after looking around, under, above and any other angle in between, no fire or smoldering, just from that pipe. This exhaust was more bluish than white. What is this a sign of? What's happening? Should I be concerned? What should I do to reduce this exhaust? I don't ever remember this amount coming from the gas engines of the 656, 666, or 756 my dad and I had. Thanks for your advice/thoughts in advance!
 
Well out the breather tube i will go with she is getting a little on the tired side and ya have wear on the sleeves and rings . when it is working the blowby is forcing the rings out and making the fit a little tighter . If it was out the exhaust then it would be valve guides. If ya ain't dumping three qt.s of oil thru it don't worry about it . Them old mounted pickers make them work .
 
Keep in mind too you are looking at blow by, there's no closed crankcase ventilation, if you are running 30w oil try diesel rated 15w40 when picking corn or other heavy field work. The 06 engines tend to smoke a little more than the later versions.
 
Really the diesel oil in a gas 706 is NOT the way to go and a vary fast way to eat and exhaust valve . They need the low ash , i don't care if ya spend the bucks at Case I H for the oil or ya find a low ash at bargain basement prices .
 
Todd-Tractor Vet thanks for your ideas! This tractor has 8900+ hours on the engine. So I am sure the number of hours is catching up to the day it will need new rings and sleeves. I didn't get to pick alot with it this fall, about 2 acres but I know this was the first time this tractor had a mounted corn picker on it. The last few years the tractor has been used on a ginder mixer mill and a hay rake. I am going to be taking the picker off this weekend so I will get a better chance to observe the tractor.
 
Yes if she's that old she's earned the right to smoke. If running well and oil consumption not too high my elders always maintained you can buys lots of oil for the cost of an overhaul. We use to wear the gassers out plowing with them, overhaul every few years was common practice.
 

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