Wheel horse d160 overheat

[LFR 39]

So I have this d160 wheel horse but it overheats after about 10 -15 minutes. Can someone help me

["D"- Man 827]

What model do you have, the Kohler single or the Onan twin?

Edited December 19, 2014 by 23 Automatic LSE

[chazm 413]

... if it is the onan , I understand  they do have cooling issues ... one of our onan guru's will chime in here shortly ...Oh yea

 

WELCOME TO

[LFR 39]

Yea it's an imam alright. They are so so expensive to rebuild.

Onan not imam

[the_nite_owl 15]

Pull the engine tins and make sure all the cooling fins are clean.

Make sure the tube that goes from the top rear of the fins to the air cleaner is connected and not plugged.  The engine will pull in the air to the carburetor through that hose effectively pulling the hot air off the engine.

If any engine tins are missing that is a big problem as they need to be there to facilitate the air movement over the cooling fins to keep the engine cool.

Make sure you have the correct amount of oil.  Over filled is almost as bad as under filled.

It could be also that the governor is not set correctly and the engine is running at a higher RPM than it should be.  I have no experience adjusting this though.

 

How do you know it is overheating?  The symptoms you attribute to overheating might indicate something else being wrong.  Post them and perhaps someone will have ideas on other possible causes.

[LFR 39]

We'll it gets super hot then it pushes out oil thought every crevice and it makes a mess. It's over heating. I took the intake right off and plugged the rubber line so that nothing gets in there.
 

[km3h 543]

We'll it gets super hot then it pushes out oil thought every crevice and it makes a mess. It's over heating. I took the intake right off and plugged the rubber line so that nothing gets in there.

We'll it gets super hot then it pushes out oil thought every crevice and it makes a mess. It's over heating. I took the intake right off and plugged the rubber line so that nothing gets in there.

 

Not sure what this means but never plug anything on an engine. It is there for a reason. If it is pushing oil out of anything, you have some work to do. My advice it to pull the engine and remove the tins. Then make sure that every area of the engine is completely clean of dirt and oil. Now is a good time to reset the valves. Onan recommends this should b e done every 500 hours. 

Edited December 19, 2014 by km3h

[the_nite_owl 15]

Oil going into the carb could mean the oil is getting contaminated with fuel thinning it out so it sucks up into the intake.  It could mean that the oil is over full as well.

If the rings are worn you could be getting pressure into the crankcase causing the oil to blow up into the intake tube.  You could have a valve sticking as well.

Like km3h said, it is a good time to reseat the valves.  Do a good cleaning of all the carbon buildup while the head is off.

There is a service manual for these Onan engines in the files section that has detailed information on how to perform the various maintenance and repairs.

 

If it is the crankcase breather tube that you plugged that could be causing you worse problems.  Also make certain your air filter is not clogged making it hard for the engine to pull in air or it will tend to suck oil in through the crankcase breather tube.

[LFR 39]

Ok thanks guys. I think I will change to oil then I will put the intake back on and run it with no filter. We'll see what happens with that and if it shoot oil out of the intake hose. I will check the fins for blockage as well. Any other tips

[ericj 1,579]

if the oil dipstick is not sealing it can cause oil blow by and if the engine is running lean it will cause a motor overheat as well. a motor running lean will overheat fairly quickly. not sure if it possible to run an onan lean enough to cause this or not. but i've seen car engines do this

 

 

 

 

 

eric j  

[LFR 39]

Hey guys update. I pulled the dipstick and it was way over full I drained the oil an only a little came out. As it was draining I pulled the dipstick right after I took the plug off and said it was level. But here the odd part. Is it didn't come flying out the drain port, just dribbling like it was almost over. Now it says it's low and I only have the container barely filled. I have the other line plugged and just put a bolt in it. The carb intake thick rubber one isn't plugged and I bllew what tiny bit of dust there was off the fins. I'm confused when it gets hot the oil pressure goes up though. Hm I am stumped on this one

[LFR 39]

I didn't just plug the line it's been plugged

[km3h 543]

Push something in  the drain hole. It may be plugged internally with something. Also smell the oil to see if it smells like gas. This would indicate the carburetor is leaking and would cause the oil to be over the correct level.

Edited December 20, 2014 by km3h

[LFR 39]

Ok I will take a wire and do it but why does it read so high and says it's over full

[Theroundhousernr 590]

On my onans, there is somewhat of an air bubble blockage when you first check oil. If I pull the dipstick the first time it will read way over full. Clean it off and leave it sit for a minute and check again, I am down to the normal level. This is true for both of my tractors with onans. Not sure about the older onan motors though.

[Desko 624]

If your talking about your PCV (positive crank ventilation) tube the you/was plugged then thats a problem as the block needs to breathe and release gases as rings dont make a perfect seal so some gases will escape by and as the pistons go down it creates air pressure and if that PCV is clogged than it will cause those problems a compression/leak down test will tell you if you have bad or worn out vlalves/piston rings as for the oil block just a dumb question did you pull the dipstick because if you dont itll create q vacuum and will cause it to drain slow thats all i could think of to cause those problems other than missing fins on the flywheel but thats unlikely