<div dir="auto">Yes, checked all tolerances. </div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Apr 6, 2020, 1:01 PM Mike M <<a href="mailto:meulenms@gmx.com">meulenms@gmx.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div text="#000000" bgcolor="#FFFFFF">
When you had it apart, did you check all the piston,ring and bearing
clearances?<br>
<br>
Mike M<br>
<br>
<br>
<div>On 4/6/2020 11:35 AM, Dave Maynard
wrote:<br>
</div>
<blockquote type="cite">
<div dir="auto">No sleeves in this engine. Someone had this engine
apart before and #5 had a new piston and rod and bearings. The
seller said it was his father's tractor since new and never been
apart....he lied! There was more RTV on oil pan than you could
imagine and obviously that piston and rod and bearings had been
replaced and I thought they had been chasing the noise. Unless
there was some other reason, but dont know.
<div dir="auto"> My friend and mechanic help has a Jacobson
mower he's is rebuilding that has a 4 cylinder version of this
motor that appears identical except the number of cyl's. He
found the rod to be the same except it a tweak shorter by an
almost immeasurable amount, maybe .005 or .010. Part number is
almost the same except last digit and now I'm wondering if
that could be someone's mistake. Would shorter rod cause
preignition? By the way, there is no part number on the rods
so they would have to be accurately measured.</div>
<div dir="auto"> It's going to be a bit before I can get
this back apart again, but hoping to have this fixed in time
to plow.</div>
<div dir="auto"><br>
</div>
<div dir="auto">Dave</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Mon, Apr 6, 2020, 9:08 AM
Cecil Bearden <<a href="mailto:crbearden@copper.net" target="_blank" rel="noreferrer">crbearden@copper.net</a>> wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div text="#000000" bgcolor="#FFFFFF">
<p>That was one of my thoughts, but my experience has been
that the liner movement was a double "thud" once on down
stroke and once on upstroke. <br>
Cecil<br>
</p>
<div>On 4/6/2020 1:12 AM, <a href="mailto:k7jdj@aol.com" rel="noreferrer noreferrer" target="_blank">k7jdj@aol.com</a>
wrote:<br>
</div>
<blockquote type="cite">
<div style="color:black;font:10pt Arial,Helvetica,sans-serif">
<div> <font size="2">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?</font></div>
<div><font size="2">I would do a compression check as
well.</font></div>
<div><font size="2"><br>
</font></div>
<div><font size="2">Gary</font></div>
<div><font size="2"><br>
</font></div>
<div><font size="2">Renton, WA.</font><br>
</div>
<div> <br>
</div>
<div> <br>
</div>
<div style="font-family:arial,helvetica;font-size:10pt;color:black">-----Original
Message-----<br>
From: Roger Moffat <a href="mailto:rogerkiwi@gmail.com" rel="noreferrer noreferrer" target="_blank"><rogerkiwi@gmail.com></a><br>
To: Antique Tractor Email Discussion Group <a href="mailto:at@lists.antique-tractor.com" rel="noreferrer noreferrer" target="_blank"><at@lists.antique-tractor.com></a><br>
Sent: Sun, Apr 5, 2020 7:43 pm<br>
Subject: Re: [AT] Kubota M5700 noise<br>
<br>
<div id="m_2085109996553918962m_-2421004768206050369yiv0933957868">
<div><br clear="none">
<div><br clear="none">
<blockquote type="cite">
<div id="m_2085109996553918962m_-2421004768206050369yiv0933957868yqtfd88006">
<div>On Apr 5, 2020, at 9:59 PM, Dave
Maynard <<a rel="noopener noreferrer
noreferrer noreferrer" shape="rect" href="mailto:dave@themaplehillfarm.com" target="_blank">dave@themaplehillfarm.com</a>>
wrote:</div>
<br clear="none">
<div><span style="font-family:Helvetica;font-size:12px;font-style:normal;font-weight:normal;letter-spacing:normal;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration:none;float:none;display:inline!important">Have
cracked injector lines one at a time,
and it gets quieter on #5</span></div>
</div>
</blockquote>
</div>
<br clear="none">
<div>But only on #5?</div>
<div><br clear="none">
</div>
<div>When you crack the others the engine misses,
but the noise remains?</div>
<div><br clear="none">
</div>
<div>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?</div>
<div><br clear="none">
</div>
<div>Eg #5 piston slightly higher than the other
4?</div>
<div><br clear="none">
</div>
<div>Roger</div>
</div>
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