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Old 07-14-2009, 09:17 AM   post #1 of 21
rryanstrickland
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Default Kohler K301 proper compression?

I just inherited my deceased grandfathers 1978 JD 312. It's been sitting for a few years now. The last time I saw it run, it was smoking pretty bad and blowing the oil dipstick out, and blowing oil everywhere. I haven't started the engine yet, but I did a compression check, and I read a consistant 120 psi(no wd-40 or oil put in the cylinder). Think it needs rings, piston, and valve job?

Any ideas out there?

Thanks,
Ryan
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Old 07-14-2009, 09:54 AM   post #2 of 21
Kbeitz
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Default Re: Kohler K301 proper compression?

Maybe your breather hole is plugged in the valve chamber...
I dont think 120 psi is that bad...
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Old 07-14-2009, 10:05 AM   post #3 of 21
rryanstrickland
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Default Re: Kohler K301 proper compression?

Kbeitz,

could you elaborate a little more on the valve chamber breather hole? What/where is this?
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Old 07-14-2009, 10:26 AM   post #4 of 21
attorney_barnabas_collins
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Default Re: Kohler K301 proper compression?

Makesure the crankcase vent is open.
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Old 07-14-2009, 10:32 AM   post #5 of 21
attorney_barnabas_collins
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Default Re: Kohler K301 proper compression?

Below the carburetor is a square cover. One bolt holding it. It has a vent. Under the cover is usually a fiber suare that is supposed to catch dirt on its oily fibers. Clean it and oil it, make sure the vent hole is open.
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Old 07-14-2009, 12:46 PM   post #6 of 21
rryanstrickland
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Default Re: Kohler K301 proper compression?

sounds good guys. Thanks

I'm going to order the operator and service manuals today...

I'll have to post some pics soon of my little project....
A few years ago I "restored" a little JD 111, and she still runs looks great! So this will be number two....

thanks for your help

Ryan
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Old 07-14-2009, 11:09 PM   post #7 of 21
rryanstrickland
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Default Re: Kohler K301 proper compression?

FOUND IT! Sorry I'm not much on mechanical terms. But usually once I put my hands on it, it all makes sense!

Dirt dobbers had totally plugged the rubber tube going into the carb breather area!

Check out my new posts with pics...give me your opinions, and advice!

Thanks,

Ryan
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Old 07-31-2009, 08:37 PM   post #8 of 21
rryanstrickland
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Default PLEASE HELP K301 smoking bad!!!

OK. I just got the tractor somewhat assembled, but I got it running. Kindof a preliminary test run. I just piped and wired up the basics until I see what I'll have to tear back down and repair/replace. Cleaned carb, ect....

It smokes like crazy! Blue smoke= OIL burning! I did a compression test after it got to normal temp and it read about 129 PSI. According to the service manual, anything between 110 and 120 PSI is good. ****, I got 129 PSI. Now I think it's my worst fear...valve problems! I've read that worn valve guides can cause it to smoke/burn oil?

PLEASE HELP!
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Old 07-31-2009, 10:18 PM   post #9 of 21
rryanstrickland
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Default Re: Kohler K301 proper compression?

or maybe I should change the old oil and put in the right stuff??? SAE 30?
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Old 08-01-2009, 10:11 AM   post #10 of 21
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Default Re: Kohler K301 proper compression?

nobody?????????
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Old 08-01-2009, 10:28 AM   post #11 of 21
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Default Re: Kohler K301 proper compression?

That would be my first action--immediate oil change in any engine--especially one sitting or not sure of....Add a couple teaspoons of MM Oil--and change it again after a couple hours of hard use....Fresh gas!!

Put in a new spark plug/like said--clean the breather vent out good--make sure there is a clean air filter on it..

Lot of little things--but any and all can cause problems....

glenn
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Old 08-02-2009, 11:20 PM   post #12 of 21
rryanstrickland
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Default Re: Kohler K301 proper compression?

Thanks Glenn. I've taken this tractor down to the frame. Replaced all fluids, a few gaskets, breather filter, cleaned carb very good, ect. I even bought some $9 SeaFoam and drizzled it into the carb with it running. But still got lots of oil burning smoke.???????
All I can guess is the valve guides are worn very badly, allowing oil to get into the combustion chamber? B/C i have tons of compression!
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Old 08-03-2009, 10:32 PM   post #13 of 21
rryanstrickland
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Default Re: Kohler K301 proper compression?

Any other ideas how it can be burning oil?
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Old 08-04-2009, 12:01 AM   post #14 of 21
rscurtis
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Default Re: Kohler K301 proper compression?

Figure on a piston and rings replacement. You still have good compression because the oil is helping to seal any compression leakage, and carbon deposits from oil consumption have probably slightly increased the compression ratio.
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Old 08-04-2009, 12:40 AM   post #15 of 21
rryanstrickland
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Default Re: Kohler K301 proper compression?

thanks rscurtis.

I just pulled the head off tonight and lots of carbon! But everything "looks" great. I see a 010 on the piston, so I'm pretty sure it's been rebuilt before 010 oversize. I'm going to take some cylinder measurements tomorrow.

One thing I did notice is the piston can move side to side just a little bit. Enough to see it noticeably?
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