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Lost Compression.

ford kohler

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#1 shorty ONLINE  

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Posted June 24, 2014 - 08:05 PM

So last night I went over to the neighbor to help him with his tractors. He has a Ford, closed side, I forget the number, with an unidentified K series kohler. He was mowing when it gave a cloud of smoke and died. Now there is zero compression. We can spin the it with one finger. 

He thought that it broke a rod, but there was no loud noise when it died. I am wondering if the valve would be stuck open, could that cause this?

I am thinking of opening it up for him just to see if I can fix it. Just not sure where to start looking.


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#2 MH81 ONLINE  

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Posted June 24, 2014 - 08:23 PM

Split piston maybe? Broke a the oil ring and its in two pieces?
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#3 trowel OFFLINE  

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Posted June 24, 2014 - 08:29 PM

Sounds like the connecting rod went.


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#4 New.Canadian.DB.Owner ONLINE  

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Posted June 24, 2014 - 08:37 PM

Well, isn't that perplexing.  Lots of smoke but no noise on shutdown.  Lots of smoke says oil getting into the combustion chamber.  Question is how?  If the rod snapped, there would be some noise, unless it snapped at TDC right at the crankshaft but that wouldn't let oil into the combustion chamber.  However, you could spin the engine with one finger & there wouldn't be any noise from it.  If the piston or rings were damaged, and you spun the engine, you'd expect some grinding noises.  if a valve or head gasket let go, you would get zero compression but would you get smoke?  I say pull the head & see what gives.


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#5 propane1 OFFLINE  

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Posted June 24, 2014 - 08:39 PM

Spilt piston. Happened to me a few weeks ago. Just going along cutting the grass and it was like you shut the key off. No noise, just slowly came to a stop, momentum made it slow to stop. Then turned over very fast on starter , because of no compression. Thought the rod broke, but no noise. Noel.
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#6 trowel OFFLINE  

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Posted June 24, 2014 - 08:42 PM

Had a engine let go with no noise, rod cap just fell off, broke the bolts and the piston just stopped 3/4 way up in the bore, took a min or two for the flywheel to stop spinning, thought the valve seized open.

 

I hope it is the valve, easier then replacing the piston/rod.


Edited by trowel, June 24, 2014 - 08:43 PM.

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#7 superaben OFFLINE  

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Posted June 24, 2014 - 08:45 PM

If you can spin it with one finger, sounds to me like it was a catastrophic failure.  You should have enough piston pressure to make you push a little bit.  I'm with those that say the piston gave up the ghost. 

 

I can get Kohler parts for a good price so if he decides to rebuild, let me know and I might be able to help put together all the parts you'd need.

 

Ben W.


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#8 shorty ONLINE  

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Posted June 25, 2014 - 07:58 PM

I will have to talk to him, to see how much to try. He was talking about selling it as is. Maybe I will have to buy it and get it running for my son. No, I better not. He is doing his best to give me grey hairs without a set of wheels.


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