[AT] Kubota M5700 noise

[k7jdj at aol.com]

 Cylinder liner loose.  Don't know if this engine even has cylinder liners if it does and that liner is moving you would get click. Did you look carefully at the head when you had it off and look for any sign of head distress?I would do a compression check as well.
Gary
Renton, WA.
 
 
-----Original Message-----
From: Roger Moffat <rogerkiwi at gmail.com>
To: Antique Tractor Email Discussion Group <at at lists.antique-tractor.com>
Sent: Sun, Apr 5, 2020 7:43 pm
Subject: Re: [AT] Kubota M5700 noise




On Apr 5, 2020, at 9:59 PM, Dave Maynard <dave at themaplehillfarm.com> wrote:
Have cracked injector lines one at a time, and it gets quieter on #5

But only on #5?
When you crack the others the engine misses, but the noise remains?
I wonder if something about cylinder 5 is somehow different so that the compression is higher, and so it’s igniting (pre-igniting) too much before top dead centre in just that cylinder?
Eg #5 piston slightly higher than the other 4?
Roger_______________________________________________
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