<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>Have you compared to another gauge? Maybe inline running the dash gauge too. </div><div id="AppleMailSignature">I have heard that a badly worn front cam bearing can cause low oil pressure issues. This bearing doesn't usually get replaced during a rebuild, even when the other cam bearings do, but they can get heavy wear. </div><div id="AppleMailSignature">Dave H.<br><br>Sent from my iPad</div><div><br>On May 12, 2020, at 2:54 PM, andrew uprichard <<a href="mailto:auprichard@uprichard.net">auprichard@uprichard.net</a>> wrote:<br><br></div><blockquote type="cite"><div><meta http-equiv="Content-Type" content="text/html; charset=us-ascii"><meta name="Generator" content="Microsoft Word 15 (filtered medium)"><style><!--
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</o:shapelayout></xml><![endif]--><div class="WordSection1"><p class="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.<o:p></o:p></span></p><p class="MsoNormal"><span style="font-family:"Times New Roman",serif"><o:p> </o:p></span></p><p class="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.<o:p></o:p></span></p><p class="MsoNormal"><span style="font-family:"Times New Roman",serif"><o:p> </o:p></span></p><p class="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).<o:p></o:p></span></p><p class="MsoNormal"><span style="font-family:"Times New Roman",serif"><o:p> </o:p></span></p><p class="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.<o:p></o:p></span></p><p class="MsoNormal"><span style="font-family:"Times New Roman",serif"><o:p> </o:p></span></p><p class="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?<o:p></o:p></span></p><p class="MsoNormal"><span style="font-family:"Times New Roman",serif"><o:p> </o:p></span></p><p class="MsoNormal"><span style="font-family:"Times New Roman",serif">Andrew Uprichard<o:p></o:p></span></p><p class="MsoNormal"><span style="font-family:"Times New Roman",serif">Jackson, Michigan<o:p></o:p></span></p></div></div></blockquote><blockquote type="cite"><div><span>** <a href="mailto:triumphs@autox.team.net">triumphs@autox.team.net</a> **</span><br><span></span><br><span>Donate: <a href="http://www.team.net/donate.html">http://www.team.net/donate.html</a></span><br><span>Archive: <a href="http://www.team.net/pipermail/triumphs">http://www.team.net/pipermail/triumphs</a> <a href="http://www.team.net/archive">http://www.team.net/archive</a></span><br><span></span><br><span>Unsubscribe/Manage: <a href="http://autox.team.net/mailman/options/triumphs/dlhogye@comcast.net">http://autox.team.net/mailman/options/triumphs/dlhogye@comcast.net</a></span><br></div></blockquote></body></html>