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HagerAC 
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Joined: 14 Sep 2010
Location: SE MN
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 Topic: 8070 white smoke
Posted: 10 Oct 2023 at 7:55pm |
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So I bought an 84 8070 to replace my burnt one about a year ago. Been good but recently it's seemed to have some white smoke when going downhill pulling wagons and maybe a little more white smoke than normal at cold startup. I did notice yesterday the temp gauge was barely off the bottom of the gauge while hauling loads. Oil level is good, antifreeze level is good. Is it just from being not up to operating temp and loading up with raw fuel or do I have an injector issue. Gonna put new thermostats in it tomorrow.
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30+ A-Cs ranging from a 1928 20-35, to a 1984 8070FWA, Gleaner R52
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DrAllis
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Joined: 12 Sep 2009
Points: 20186
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Posted: 10 Oct 2023 at 8:05pm |
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Injectors in backwards ??? return line goes up against the valve cover, not away from the valve cover.
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HagerAC
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Location: SE MN
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Posted: 10 Oct 2023 at 8:53pm |
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Nope they're in right, I do know the story of how that can easily happen.
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30+ A-Cs ranging from a 1928 20-35, to a 1984 8070FWA, Gleaner R52
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HagerAC
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Joined: 14 Sep 2010
Location: SE MN
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Posted: 10 Oct 2023 at 8:56pm |
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Runs and pulls good otherwise, just thought maybe an injector not closing all the way or something.
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30+ A-Cs ranging from a 1928 20-35, to a 1984 8070FWA, Gleaner R52
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AC7060IL
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Joined: 19 Aug 2012
Location: central IL
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Posted: 11 Oct 2023 at 5:14am |
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Clogged fuel filter?
Clogged fuel tank fuel line?
It might be a beginning of some sort of fuel starvation??
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injpumpEd
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Joined: 13 Sep 2009
Location: Walnut IL
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Posted: 11 Oct 2023 at 7:58am |
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white smoke typically indicates cold combustion, or late injection timing. So knowing the coolant is not up to temp is a place to start, then a recheck of the timing is next, make sure it's at 19* BTDC. The nozzles could be in need of servicing, as they tend to kinda piss when they get tired, which can also lead to excess smoke under light loads. It'll run fine with a load because the fuel is getting in the cylinder, just isn't atomizing correctly so it shows up under those light to no load situations.
Edited by injpumpEd - 11 Oct 2023 at 7:59am
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210 "too hot to farm" puller, part of the "insane pumpkin posse". Owner of Guenther Heritage Diesel, specializing in fuel injection systems on heritage era tractors. stock rebuilds to all out pullers!
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HagerAC
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Location: SE MN
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Posted: 11 Oct 2023 at 8:33am |
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The more I think about it, I'm leaning towards fuel restriction, as in fuel filter so I'm gonna put them on as well. But it definitely needs the thermostats as well
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30+ A-Cs ranging from a 1928 20-35, to a 1984 8070FWA, Gleaner R52
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