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Old 04-15-2019, 04:19 PM   #1
Grulla
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Default Small engine repair guys

I have a 2014 Kawasaki mule 4010 , Iíve been having some excessive blow by and itís causing it to smoke . I went ahead and pulled the heads on the engine and noticed some side to side movement from the pistons inside the cylinder walls . I know there should be some movement on a cold engine to allow for expansion when the engine heats up . I have 2 videos I could share but Iím not sure how to post videos , I could send via email or text .
Any help is appreciated .
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Old 04-15-2019, 06:14 PM   #2
BTLowry
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don't sound good

No expert here but I'm guessing over bore and new piston/rings at minimum

Hope I am wrong and it is an easy and cheap fix
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Old 04-15-2019, 06:22 PM   #3
flywise
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i think that movement should be very minimal as in almost none.
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Old 04-15-2019, 06:24 PM   #4
KyleW
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How’s the cylinder look?
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Old 04-15-2019, 07:39 PM   #5
Wes Chaney
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Quote:
Originally Posted by flywise View Post
i think that movement should be very minimal as in almost none.


This.. piston to cylinder clearance is measured in thousandths of an inch, average.0025-.004 depending on manufacturers specs. If you have as much play as it sounds like, a bore and over sized pistons are in order... if the rings a just shot and the cylinder is ok, honing and new rings should fix you up


Sent from my iPhone using Tapatalk
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Old 04-15-2019, 10:45 PM   #6
Kbar
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I looked at the video.
I have seen small engines that had that much play. Whether that's excessive or not, I don't know. A service manual should give you the specs you are looking for. I'll call a couple of people tomorrow that work on those machines and see what their thoughts are.

By chance did you change from a conventional oil to a synthetic and then the blowby started?
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