<!doctype html>
<html>
<head>
<meta charset="UTF-8">
</head>
<body>
<div style="font-size: 12pt; font-family: helvetica, arial, sans-serif; color: rgb(51, 51, 51);">
I've never heard of such a thing, but could the oil itself be the culprit? Maybe a too thin variety got into a wrong bottle? Or maybe just a bad batch?
</div>
<blockquote type="cite">
On May 13, 2020 at 7:34 AM andrew uprichard <auprichard@uprichard.net> wrote:
<br>
<br>
<div class="ox-bce5156b55-WordSection1">
<p class="ox-bce5156b55-MsoNormal"><span style="font-family: 'Times New Roman',serif; color: #1f497d;">Thanks for al the suggestions. Gauge is good, have tried a new oil pump. I think the next step is to plastigauge the bearings and check the rocker shaft, as suggested. Then I guess the engine will have to come out. Sigh….. </span></p>
<p class="ox-bce5156b55-MsoNormal"><span style="font-family: 'Times New Roman',serif; color: #1f497d;"> </span></p>
<div>
<div style="border: none; border-top: solid #E1E1E1 1.0pt; padding: 3.0pt 0in 0in 0in;">
<p class="ox-bce5156b55-MsoNormal"><strong>From:</strong> Alex & Janet Thomson <aljlthomson@charter.net> <br><strong>Sent:</strong> Wednesday, May 13, 2020 5:58 AM<br><strong>To:</strong> 'andrew uprichard' <auprichard@uprichard.net>; triumphs@autox.team.net<br><strong>Subject:</strong> RE: [TR] Ideas, anyone?</p>
</div>
</div>
<p class="ox-bce5156b55-MsoNormal"> </p>
<p class="ox-bce5156b55-MsoNormal"><span style="font-size: 12.0pt; color: #1f497d;">Was the crankshaft cut down by a previous owner for use with undersize bearing shells? I saw this happen in a Nuffield tractor once. Great oil pressure at startup but diminishing quickly as the oil thinned out. </span></p>
<p class="ox-bce5156b55-MsoNormal"><span style="font-size: 12.0pt; color: #1f497d;"> </span></p>
<p class="ox-bce5156b55-MsoNormal"><span style="font-size: 12.0pt; color: #1f497d;">Alex Thomson </span></p>
<p class="ox-bce5156b55-MsoNormal"><span style="font-size: 12.0pt; color: #1f497d;"> </span></p>
<div>
<div style="border: none; border-top: solid #B5C4DF 1.0pt; padding: 3.0pt 0in 0in 0in;">
<p class="ox-bce5156b55-MsoNormal"><strong><span style="font-size: 10.0pt; font-family: 'Tahoma',sans-serif;">From:</span></strong><span style="font-size: 10.0pt; font-family: 'Tahoma',sans-serif;"> Triumphs [<a href="mailto:triumphs-bounces@autox.team.net">mailto:triumphs-bounces@autox.team.net</a>] <strong>On Behalf Of </strong>andrew uprichard<br><strong>Sent:</strong> Tuesday, May 12, 2020 5:54 PM<br><strong>To:</strong> <a href="mailto:triumphs@autox.team.net">triumphs@autox.team.net</a><br><strong>Subject:</strong> [TR] Ideas, anyone? </span></p>
</div>
</div>
<p class="ox-bce5156b55-MsoNormal"> </p>
<p class="ox-bce5156b55-MsoNormal"><span style="font-family: 'Times New Roman',serif;">Having (I think) sorted out the problem with the TR4, I took a recently-finished TR3B out for its second inaugural drive. </span></p>
<p class="ox-bce5156b55-MsoNormal"><span style="font-family: 'Times New Roman',serif;"> </span></p>
<p class="ox-bce5156b55-MsoNormal"><span style="font-family: 'Times New Roman',serif;">The first inaugural drive went pretty well, but once the engine temp came up, the oil pressure fell like a stone – and here we are talking around 40psi at 3000rpm and almost nothing at (what was hot) idle. Adjusting the pressure with the screw on the oil filter head did nothing. </span></p>
<p class="ox-bce5156b55-MsoNormal"><span style="font-family: 'Times New Roman',serif;"> </span></p>
<p class="ox-bce5156b55-MsoNormal"><span style="font-family: 'Times New Roman',serif;">I checked everything over, even pulled the oil pan and checked all the bearings (one main and 4 rods) – all perfect. I really didn’t find anything, and the specs on the oil pump looked good, but I ordered a new pump as well as a new spring for the Purolator oil filter head (the valve itself is no longer obtainable). </span></p>
<p class="ox-bce5156b55-MsoNormal"><span style="font-family: 'Times New Roman',serif;"> </span></p>
<p class="ox-bce5156b55-MsoNormal"><span style="font-family: 'Times New Roman',serif;">So today when I first took it out, the pressure was almost too high – around 90 at 3000 rpm. But as soon as the engine warmed up, it again dropped to scary levels. No leaks, no oil in water or vice versa. </span></p>
<p class="ox-bce5156b55-MsoNormal"><span style="font-family: 'Times New Roman',serif;"> </span></p>
<p class="ox-bce5156b55-MsoNormal"><span style="font-family: 'Times New Roman',serif;">I am running out of ideas here. Could it be a bad oil filter head? Anything else? </span></p>
<p class="ox-bce5156b55-MsoNormal"><span style="font-family: 'Times New Roman',serif;"> </span></p>
<p class="ox-bce5156b55-MsoNormal"><span style="font-family: 'Times New Roman',serif;">Andrew Uprichard </span></p>
<p class="ox-bce5156b55-MsoNormal"><span style="font-family: 'Times New Roman',serif;">Jackson, Michigan </span></p>
</div>** triumphs@autox.team.net **
<br>
<br>Donate: http://www.team.net/donate.html
<br>Archive: http://www.team.net/pipermail/triumphs http://www.team.net/archive
<br>
<br>Unsubscribe/Manage: http://autox.team.net/mailman/options/triumphs/terryrs@comcast.net
<br>
</blockquote>
<div style="font-size: 12pt; font-family: helvetica,arial,sans-serif; color: #333333;" class="default-style">
<br>
</div>
</body>
</html>