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AHS

Adjusting valves on kohler command 12.5

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AHS

Good morning! It happens when I start it... smoke, smoke!! Blue smoke. I have changed the oil since I have got it.  How can I adjust valves  on the over head cam? It is the only step I can think of.. that I can think? It runs fine it’s just when it starts, blue smoke!!

3B818E9A-3C29-41C9-AE5C-56A81767CD5C.jpeg

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gwest_ca

Kohler service manual

Garry

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gwest_ca

These engines have hydraulic lifters so are automatically adjusted. That should not affect oil consumption.

Try cleaning the crankcase breather. It should maintain a vacuum in the crankcase when running. If the check valve is leaking the crankcase will be under pressure which can force oil past the rings and valves.

 

Garry

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ebinmaine

Also, be sure the breather goes back in the correct way.

There may be a hole to let oil seep out.

 

Is the new oil a multi viscosity oil?

 

I've heard tell of others having consumption issues...

 

But I'd run it anyways.

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AHS
1 hour ago, gwest_ca said:

These engines have hydraulic lifters so are automatically adjusted. That should not affect oil consumption.

Try cleaning the crankcase breather. It should maintain a vacuum in the crankcase when running. If the check valve is leaking the crankcase will be under pressure which can force oil past the rings and valves.

 

Garry

The crankcase breather? I know where it is on the k- series! It right here in the picture, the tube that goes from the ohv to the carb?

869EBF37-7A24-4352-867F-735E32CCD655.jpeg

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AHS
8 minutes ago, ebinmaine said:

Also, be sure the breather goes back in the correct way.

There may be a hole to let oil seep out.

 

Is the new oil a multi viscosity oil?

 

I've heard tell of others having consumption issues...

 

But I'd run it anyways.

5w30 in the winter 

10w30 in the summer? Correct?

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peter lena

sounds like that smoke could easily be the neglected oil drainage ,not done before you. found 2 or 3 hot oil changes after usage  really helps to flush out the crud. i also agree with AHS on the breather system , a sludge / scum  build up will plug relief pressure , making it go to piston rings / smoke. take the time to open this vent system and ensure its engine pressure relief. i agree with the use of 5-30 oil over winter, i also  use this ,https://www.walmart.com/ip/Bayco-SL-300-8-5-Inch-Clamp-Light-with-Aluminum-Reflector/14003467  to lightly pre heat my engines in winter, install it under the center lower techamatic  point , for simple added starting ease. i also regularly use stabil in all my fuel , battery tender , for instant winter starts. i bet the engine vent hose is clogged up with oil / moisture crud . good luck with it , pete

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ebinmaine
14 minutes ago, AHS said:

5w30 in the winter 

10w30 in the summer? Correct?

All of ours are the older k-series. The manual for your engine will give you the specs.

We run 30 weight alot of the year and 10w30 in the winter.

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AHS

Is this the crank case vent tube? The tube from the ohv to the carb? @ebinmaine 

 

2C050514-AB7F-46D0-AC6C-8723CF5AE13D.jpeg

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ebinmaine

I'm not positive. But it sure looks right.

Pop it off and see what's inside.

 

 

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AHS

I’ve had the carb off it plenty of times, which means the crank case vent tube... hmmm

 

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gwest_ca

#25 in this illustration is the reed valve. This is for 1999 so make sure of the model year in case they changed the design.

https://www.partstree.com/models/73429-312-8-toro-garden-tractor-sn-099000001-099999999-1999/cylinder-head-valve-breather-model-73429-only-13/

I see it is no longer available so they must have changed something between then and now.

 

Garry

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AHS

Thanks guys! I hope that it! I will change the oil, and the breather reed.👍

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gwest_ca

I would not be surprised if they had a problem where the reed valve broke off from metal fatigue. The fix was to add a second piece to limit how far the valve could bend.

Usually when that happens a service bulletin is issued on the change.

A servicing dealer may have more knowledge on the subject.

 

Here is what they used in 2001. I did not compare part numbers

https://www.partstree.com/models/ch12-5-1935-kohler-command-pro-single-engine-made-for-toro-12-5hp/head-valve-breather-3/

 

Garry

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AHS

Yesterday, I took apart the breather tube and blew threw it, no obstruction. Today I started it... no smoke!👍 i changed the oil to 5w-30, and filter... and started it up... no smoke👍. I dunno... I guess I fixed it... on to plowing!!

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AHS

No rest for the wicked!! @ebinmaine 😁I’m gonna be out with the plow on the 312 tomorrow. I have gotten the auger in the blower frame, and new idler sprockets... that is why I’ve got the plow!!

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ebinmaine

Not much snow predicted down here.

4 or 5 inches...

 

I'M fine with that !!!

 

We're ready except for the Tecumseh in the small blower (I think) needs a coil.

 

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AHS
54 minutes ago, ebinmaine said:

Not much snow predicted down here.

4 or 5 inches...

 

I'M fine with that !!!

 

We're ready except for the Tecumseh in the small blower (I think) needs a coil.

 

Ya, I think that’s all we’re gonna get too! I think the Tecumseh needs a Kohler👍😁

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ebinmaine
6 minutes ago, AHS said:

Tecumseh needs a Kohler

In overall principal I agree but it's just an old snowblower. WELL worn.

 

I wouldn't even bother to repower...

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