Re: [Healeys] Glycol in oil - Update and summary

[Hank Leach via Healeys <healeys@autox.team.net>]

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<div>Roger-I still have a feeling that it is bi-passing the waterj acket =
via the threads in the studs-somewhere in head or rocker studs. Check the =
manual for diagram of block showing all areas that are close enough for the=
 water gallery to be near the combustion areas. Tough mystery! =
Hank<br>-------------------- <br><br>From: "Roger Grace" &lt;roggrace@telus=
.net&gt; <br>To: "Healeys" &lt;healeys@autox.team.net&gt; <br>Sent: March =
10, 2024 at 10:27 AM PDT <br>Subject: [Healeys] Glycol in oil - Update and =
summary </div>
<div><strong>Issue</strong> &ndash; 67 BJ8 with about 15k mi=
 on rebuilt engine by PO.
<p style=3D"margin-bottom: 0cm;">A few months =
back when setting tappets noted the dreaded creamy gunge on the inside of =
the valve cover indicative of glycol and moisture in the oil.</p>
<p style=3D"margin-bottom: 0cm;">Have lost several engines (not AH) over =
the years due to this phenomenon and am a little paranoid about glycol in =
the oil. No evidence of oil in coolant. Compression normal.</p>
<p style=3D"margin-bottom: 0cm;">Took oil sample to the CAT lab and came =
back positive with 1332 ppm glycol and 240 ppm sodium. About 1500 mi on the=
 sample</p>
<p style=3D"margin-bottom: 0cm;"><strong>Step #1</strong></p>
<p style=3D"margin-bottom: 0cm;">So, drained oil completely including the =
oil cooler (pia) plus filter. Re torqued head and added some Bars leak =
stuff to the rad. Drove 420 mi and did retest. Still positive for glycol at=
 557 ppm and 55 sodium</p>
<p style=3D"margin-bottom: 0cm;"><strong>Step =
#2</strong></p>
<p style=3D"margin-bottom: 0cm;">Head off; planed, pressure=
 test and freshen by machine shop; new hi end gasket; new ARP studs; piston=
 tops cleaned; new gaskets all round. Drained oil completely again and also=
 new coolant. BTW use 20% glycol in RO water plus No-Rosion. Drove 420 mi =
again and retest. Some improvement but still positive. Above the lab. flag =
level of 500 ppm (glycol) and 25 ppm (sodium) at 609 ppm glycol and 29 =
sodium. Just on edge as they only do glycol analysis if sodium is above 25 =
ppm. For interest this translates into 3.25ml (less than a teaspoon) glycol=
 or 16.26ml for coolant to trigger the flag. Must be bad stuff.</p>
<p style=3D"margin-bottom: 0cm;"><strong>Step #3</strong></p>
<p style=3D"margin-bottom: 0cm;">Coolant pressure test. Drops 3 psi from 13=
 psi in 14 hours. Done at 65F. This seems to indicate a small leak ?</p>
<p style=3D"margin-bottom: 0cm;"><strong>My thoughts:</strong></p>
<ol>
<li>
<p style=3D"margin-bottom: 0cm;">small crack in block or head that =
opens up with heat ? Block more likely.</p>
</li>
<li>
<p style=3D"margin-bottom: 0cm;">unlikely to be the known AH block porosity=
 problem with the galleries, as oil at 50 psi and the coolant is at less =
than 7psi and there is no evidence of oil in coolant. Must be in the =
gravity oil return path to the oil pan someplace.</p>
</li>
<li>
<p style=3D"margin-bottom: 0cm;">plan to run with no glycol in coolant; am =
located on mild west coast and heated garage; change oil more frequently. =
Hopefully any water will evaporate off. My understanding is that water is =
less of a problem than glycol in the oil ?</p>
</li>
<li>
<p style=3D"margin-bottom: 0cm;">consider trying a coolant leak sealant =
again.</p>
</li>
<li>
<p style=3D"margin-bottom: 0cm;">maybe next winter =
pull oil pan and hunt for the leak from downstairs with coolant under =
pressure with a view to doing an epoxy repair ? Wonder if others have heard=
 of this or there is a<em> &ldquo;known&rdquo; </em>area of block weakness =
?</p>
<p style=3D"margin-bottom: 0cm;">&nbsp;</p>
</li>
</ol>
<p style=3D"margin-bottom: 0cm;">So, would welcome <strong>any</strong> =
ideas/thoughts/suggestions</p>
<p style=3D"margin-bottom: 0cm;">rg</p>
</div>
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