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post #1 of 18 Old 05-17-2017, 07:44 PM Thread Starter
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Reducing Kohler Oil Passing Through Breather

I know the Kohler in my 216 is getting worn out. The air filter housing is getting oil dumped in it from the breather tube. I took things apart and have a new breather element to try and mitigate some of the oil consumption. Has anyone ever tried any tactics to try and prevent so much oil from making it into the air cleaner housing?
1. doubling up the filter element to try and trap more oil.
2. enlarging the drain back hole in the baffle plate.

As you can see in the pic its leaking out the housing and covering the front of the engine. I know that the motor needs a rebuild - but I am trying to prolong its life for as long as possible.

Thanks

Derek.-
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post #2 of 18 Old 05-17-2017, 07:49 PM
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Re: Reducing Kohler Oil Passing Through Breather

About the only thing you can do is rebuild the engine as far as I know.

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post #3 of 18 Old 05-17-2017, 07:53 PM
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Re: Reducing Kohler Oil Passing Through Breather

It's time for the rebuild, or you risk an oil fire, and a total loss of the machine. Simple get'er done!

Russ

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post #4 of 18 Old 05-17-2017, 08:30 PM
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Re: Reducing Kohler Oil Passing Through Breather

I guess you could do compression and/or leak down test to see if it's mostly the Rings or the valves. But it's probably mostly the Rings are letting oil go by. What kind of oil are you running? I would switch over to Valvoline VR1 racing 40 weight straight and add some restore engine treatment to it 6 ounces. I have really seen it have some remarkable results.
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post #5 of 18 Old 05-17-2017, 10:02 PM Thread Starter
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Re: Reducing Kohler Oil Passing Through Breather

I picked up a new breather filter, looking at the cover plate I don't think you could squeeze two in there. I have been running Rotella 15w40 and even some mobil 1 15w50. Will the straight 40wt be thicker than the multi viscosity 50wt ?

I also got a can of restore - I to have heard good things, so we'll see what happens.

I just don't have the time right now for a rebuild. I am planning to pick up a Zero turn here in the near future, just need to keep this one running.
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post #6 of 18 Old 05-17-2017, 11:05 PM
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Re: Reducing Kohler Oil Passing Through Breather

Yes the 40 weight will maintain thicker at temperature than the other two. And mobil 1 being fully synthetic tends to find all the nooks and crannies and leaks to get out everywhere. Six to eight ounces of restore straight 40 weight and then get about 10 - 15 hours of use and see if consumption gets better.
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post #7 of 18 Old 05-17-2017, 11:32 PM
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Re: Reducing Kohler Oil Passing Through Breather

I had similar amounts of oil in the breather on my 300. I feared a ring job or more was needed. I started with a new head gasket, valve job, and intake valve seal. That fixed it for me.
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post #8 of 18 Old 05-18-2017, 09:08 AM
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Re: Reducing Kohler Oil Passing Through Breather

You could always run a longer hose over to a separate catch can. Something like a 1 qt plastic oil bottle.
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post #9 of 18 Old 05-18-2017, 09:14 AM
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Re: Reducing Kohler Oil Passing Through Breather

Here's an actual catch can but I'm sure you can find them cheaper.

https://www.summitracing.com/parts/m...QjwBoC4Kjw_wcB

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post #10 of 18 Old 05-18-2017, 12:10 PM
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Re: Reducing Kohler Oil Passing Through Breather

That Kohler Single . Is my favorite
Engine to Rebuild.. As they are Not to fussy About the Cylinder Tolerances , I have rebuilt them In one Night, Hone Cylinder . Lap the Valves. New gaskets. Use NO lube On any Bolts.. All is Good.. Remove the Head. Clean the top of the piston. To see if it has been Messed with. No numbers. Order Standard Rings. And I always Plastic Gage the Rod. . To avoid Disagreements/arguments I shell not Post My tolerances Used.
Life is good .. Enjoy
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post #11 of 18 Old 05-19-2017, 03:49 PM Thread Starter
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Re: Reducing Kohler Oil Passing Through Breather

I put the motor back together with the new breather filter.

Filled it with fresh 40w and a can of restore.

Cut the grass, maybe 1.5 hours of run time and the oil level went from halfway between L/H to not even registering on the dipstick.

Might be time for a new mower...

(not to mention I had to stop and fix a belt issue, 15 minutes into cutting)
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post #12 of 18 Old 05-19-2017, 05:21 PM
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Re: Reducing Kohler Oil Passing Through Breather

That's a lot of oil use.
If it's not leaking it must be smoking visibly. Is is all coming out of breather tube into carb, or do you have a catch container for the tube?

What kohler is this? What does a fresh spark plug look like after an hour or use?
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post #13 of 18 Old 05-19-2017, 05:26 PM Thread Starter
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Re: Reducing Kohler Oil Passing Through Breather

Its a 341AQS. Its smoking out the exhaust, so its definitely being burned. I have not seen anything coming out the breather yet. I will go pull the plug and take a pic after it cools down a bit
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post #14 of 18 Old 05-19-2017, 05:43 PM
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Re: Reducing Kohler Oil Passing Through Breather

Can you tell if it has a lot of blow by. Does that one have a full length dipstick? Have you taken the breather tube which I assume goes to the carburetor off to see if it's blowing out of there blowing oil and blow by excessively out of the breather tube.
I think with that much oil consumption it would just be simpler to get a head gasket a sump gasket and a set of rings. You can rent a hone at the parts store to crosshatch the cylinder.
Unless the cylinder is way out of round it should get remarkably better. You should also check the valve guides to see if they're sloppy and replace any seals that maybe on the valves. You can also lap the valves in while you have an apart so they will feel better too. I would have to think that it's the rings and got a lot of blow by. I'm not sure if a bad intake valve stem seal and sloppy guide would cause that much consumption on that engine or not.
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post #15 of 18 Old 05-19-2017, 06:44 PM Thread Starter
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Re: Reducing Kohler Oil Passing Through Breather

I originally thought I had a bad oil pan gasket, as the oil level always seemed to hit the same level. I just had the motor out, did an oil pan and head gasket. Didn't do much else but degrease it.
I didn't see any smoke coming out of the breather - it all seemed to be exhaust and it did increase under load. The valves looked ok when I took the head off. I just cleaned everything and put it back together.
The motor smoked a lot on startup. That would leave me to believe its a guide issue now, as is stops when the motor warms up or the oil level drops.
I know now it needs a more in depth going through - but given the middle of growing season I just don't have time.
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