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Engine oil problems

1537 Views 11 Replies 6 Participants Last post by  shadetree
Went to change the oil on an atv that hasn't been ran in a really long time after checking the starter and compression that seemed fine. The oil is so thick only a little come out and I can see down on there it is thick and pasty. Can you clean it out without taking everything apart? I'm down to frame and motor. Carb is off but I'm unfamiliar with the insides of a small engine.
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I would top off with summer weight oil and cycle it around with the kick start several times. Pull the plug out to make it easier.
You might also put a speedhandle and socket on the flywheel (like you would if you were cycling engine to set valves). Maybe use and air wrench to cycle it around.
Cycle and drain, cycle and drain. Just to make sure you’re getting fresh oil up in the head.
I have heard people using seafoam to clean out the crankcase. But I haven’t needed to. Lotsa sludge can build up in the bottom and that’s where the oil pickups are
Thank you again and again. That's kind of what I had in mind but you made it more clear for me. I got in myself familiar with everything else on the ATV but inside the engines a little bit foreign to me. Haven't messed with that for over 20 years
when oil in a motor gets that all sticky and tar like deal
it takes a LOT of work to get it out, as it will junk up in places and just STICK and stay pretty tacking collecting and holding crap in it
some things I know folks to have done
one, BEFORE draining, they warm motor up with a heat gun or like ways, to TRY and get oil thinner so it drains better and cleans out better
if you already drained or tried to, this won;t work really
SO option # 2 might be flushing motor with something like kerosene, or diesel fuel, and sloshing it about a lot, pulling motor over with pull starter(NO battery or plug in motor)
and repeating a few times

I have also known a few guys that heated NEW oil up, and then poured in HOT oil into motor and let it soak in some and then drained and THEN flushed

once they THINK it seems OK
then do a real oil change(filters being replaced a few times with above)
and the n running up to temp, let cool, and do again, and then drain and repeat till they feel good all thick nasty oil and junk is OUT
and then again, do a full oil change
its not cheap, fun, or easy to do, but, it can save you from a rebuild or worse, if a lot of crap is in there! and or blocks a line with being all gunky and thick, that breaks loose and then stops flow on you!

you drop a ice cube in hot water, it still takes time to melt, and a motor starving for oil; it doesn;t take long for things to go bad FAST
Thank you so much. I've only been learning about ATVs for about a month and have learned about everything on the atv outside of the engine. Small engine knowledge has been about 20 years ago so I'm not familiar. I'm down to the frame only and have taken the engine off. Will be rebuilding everything and hopefully find a way to flush it out. If not I will learn to take it apart and rebuild. Thank you. I will try to flush if first.
I think you are right. Was hoping for an easy solution and a more detailed solution on my next build. This is my first and was hoping to not get into the engine. Thanks again I appreciate it
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