Kohler Engine Trouble

Mike Pa · Jul 5, 2011

Good morning!

Was looking for some advice on a Kohler 27 HP Commercial engine.

Symptoms:
-Using 1/2 Qt of oil in two hours and fouling the plug on the #1 cylinder.

Repairs:

-Pulled the head and found a burnt and broken exhaust valve. Replaced the exhaust valve, head gasket and all the breather components.

The engine is still fouling the plug a bit and there is still excessive crankcase pressure?

Thanks!

RPW · Jul 5, 2011

Possibly broken or Stuck rings.

Jim Thompson · Jul 5, 2011

How did the piston and cylinder look? Also, check valve guide and seal.

Jim

banjodunn · Jul 5, 2011

RPW said:
Possibly broken or Stuck rings.

X2 try doing a leakdown test if you have the equip if not most of the dealers have them and should not charge too much to do it for you

Jon

Jim Thompson · Jul 6, 2011

In the other thread, you said something about not having much play in the valve guide. I think that you shouldn't have any play. With lubricant applied to the valve stem, I would expect no lateral movement.

Jim

Mike Pa · Jul 6, 2011

Thank you all for your responses. A few notes on your comments:

-The play in the guide was barely noticeable, just a very minor amount with no visble damage to the guide

-My dealer did a leak down test and said all ranges were normal so they chaged all the breather components.

-The piston head was loaded with carbon that we removed, but otherwise in good shape

Ford tractor · Jul 6, 2011

Mike Pa said:
Thank you all for your responses. A few notes on your comments:

-The play in the guide was barely noticeable, just a very minor amount with no visble damage to the guide

-My dealer did a leak down test and said all ranges were normal so they chaged all the breather components.

-The piston head was loaded with carbon that we removed, but otherwise in good shape

If the head was full of carbon, the rings may be that way too.

Quick question: which head is #1 and which is #2?

Jim Thompson · Jul 6, 2011

Ford tractor said:
If the head was full of carbon, the rings may be that way too.

Quick question: which head is #1 and which is #2?

That's exactly what I was thinking regarding the carbon. A good dose of Sea Foam or two should be just what the doctor ordered for cleaning up that carbon.:thumbsup:

Jim