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<p>Does this noise start immediately or after it is run a bit. It
could be carbon buildup on the head or piston. This would
increase compression and also if it was glowing it could cause
pre-detonation. Another thought. Is it possible that the
pre-combustion chamber is moving in its recess? This is a one
time click along with the injection it seems. <br>
Cecil<br>
</p>
<div class="moz-cite-prefix">On 4/5/2020 9:42 PM, Roger Moffat
wrote:<br>
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<blockquote type="cite"
cite="mid:2BD8A492-D8D0-4BE1-8BC9-7A506C236F69@gmail.com">
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<blockquote type="cite" class="">
<div class="">On Apr 5, 2020, at 9:59 PM, Dave Maynard <<a
href="mailto:dave@themaplehillfarm.com" class=""
moz-do-not-send="true">dave@themaplehillfarm.com</a>>
wrote:</div>
<br class="Apple-interchange-newline">
<div class=""><span style="caret-color: rgb(0, 0, 0);
font-family: Helvetica; font-size: 12px; font-style:
normal; font-variant-caps: normal; font-weight: normal;
letter-spacing: normal; text-align: start; text-indent:
0px; text-transform: none; white-space: normal;
word-spacing: 0px; -webkit-text-stroke-width: 0px;
text-decoration: none; float: none; display: inline
!important;" class="">Have cracked injector lines one at a
time, and it gets quieter on #5</span></div>
</blockquote>
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<br class="">
<div class="">But only on #5?</div>
<div class=""><br class="">
</div>
<div class="">When you crack the others the engine misses, but the
noise remains?</div>
<div class=""><br class="">
</div>
<div class="">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 class=""><br class="">
</div>
<div class="">Eg #5 piston slightly higher than the other 4?</div>
<div class=""><br class="">
</div>
<div class="">Roger</div>
<br>
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