soot from exhaust

Dpierce

Member
I have a diesel 5000 that has a fair amount of soot that comes out the bottom of the exhaust pipe and drips runs and splatters down the side of the of the engine near the oil filter. it also has a little that makes its way to the top of the muffler and runs down. the tractor starts fairly easy but it does smoke a little. this tractor isn't used a whole lot and is not worked hard, usually 1/4 or 1/2 throttle pulling a wagon load of firewood or blading. my question is what is causing the black runny soot and is it something to be concerned with.
 
It's called 'slobbering'. It can be common to diesel engines that aren't worked
hard fairly regularly. 5000's seem to be really bad for this, I have two that both
do it when not worked hard for awhile. Doesn't really hurt much except for making a
mess. My 2cents worth Greg NE
 
Yup, what Greg said. Diesel slobber. Very common on tired diesels that have lower than usual compression heat. Best cure is to repair the engine and get the compression high as possible to stop it.
 
thanks for the info. I did a rering job on it this past spring so I will just let it slobber for now.
 
I've been looking for a 7-8' mower to run behind it. looks like I have a reason to look a little harder now lol. The engine runs right at 180-190 degrees.
 



Very common.. when a cold engine is started, it develops water vapor in the exhaust, that basically washes the carbon off the exhaust pipes. YUCK!!!! Diesel engines also add a bit of unburnt diesel fuel to the mix... Double YUCK!!! And then there is the excess oil that comes from the valve guides that drains into the exhaust ports... So add all of that up, and.... PRESTO.. you have diesel slobbering... Mainly a problem with cold starts.. running it up to temp will burn off the excess water vapor, oil, and diesel fuel and clean it up. If you were to work the the tractor hard everyday, you would not see much of that. If you let it sit, start it occasionally, you will see more of that...


Common, and not necessarily a problem, just an annoyance.
 
Good temp for a diesel. Got to run it hard for awhile to get things cleaned out. Using a diesel engine cleaner solvent will help clean up the engine and
reduce the build up which will reduce the amount of puke. Power Services, Sea Foam, two I use, available at WW or any auto store.....directions on
container. Once you clean it up and use it more frequently that will pretty much disappear. II'd expect in the Northern states it is more of a problem than
here in TX. I don't have the problem in any of my tractors but did experience it with a friend's that I was helping getting it started after sitting for a
year.......puked all over me and a brand new gimmie cap I was wearing. Didn't wash out of the cap.
 

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