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<DIV style="FONT-SIZE: 12pt; FONT-FAMILY: 'Century'; COLOR: #000000">David
Nock<BR>British Car
Specialists<BR>209-948-8767<BR>www.britishcarspecialists.com</DIV>
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<DIV style="font-color: black"><B>From:</B> <A title=dcorning@ford.com
href="mailto:dcorning@ford.com">Corning, Dan (D.C.)</A> </DIV>
<DIV><B>Sent:</B> Wednesday, May 02, 2018 11:08 PM</DIV>
<DIV><B>To:</B> <A title=healeys@autox.team.net
href="mailto:healeys@autox.team.net">healeys@autox.team.net</A> </DIV>
<DIV><B>Subject:</B> [Healeys] Feeling Pressured</DIV></DIV></DIV>
<DIV> </DIV></DIV>
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<DIV>I’m trying to diagnose why my BT7s oil pressure too high after rebuilding
the engine. With the spark plugs removed, engine cranking oil pressure
builds to 90 PSI. I did install a high capacity oil pump from Healey
Surgeons but I don’t think that is the root of the issue. I’ve never
started the engine after the rebuild and won’t until I get this resolved.</DIV>
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<DIV>Looking through the archives for similar problems led to the possibility
the oil pressure relief return port was covered during the rebuild, blocking the
return of oil to the sump. To test this, I pulled the oil pressure relief
valve and spring, put the plug back in and cranked the engine. The
cranking oil pressure dropped significantly, low enough that it didn’t register
on the gauge. If I’m correct, that eliminates the return port as the
problem because if they WERE plugged, the oil return still would have been
blocked and the pressure would have still been high. I suspect it’s now
more likely the pressure relief valve is sticking in the bore or simply too much
spring pressure keeping the valve closed. </DIV>
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<DIV>I trial fitted the pressure relief valve back in the engine bore and didn’t
feel any binding although the valve did have some scoring. Reviewing each
component, I noticed the spring fits nicely inside the back side of the pressure
relief valve but does not fit INTO the cavity inside the plug. (see photo)
Is it possible I have the wrong plug? Maybe switched the oil pan plug with
the pressure relief plug forcing the spring too far into the pressure relief
bore?</DIV>
<DIV><FONT size=2 face=Calibri><SPAN
style="FONT-SIZE: 11pt"></SPAN></FONT> </DIV>
<DIV>Any ideas that might help me pinpoint the concern?</DIV>
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style="FONT-SIZE: 11pt"></SPAN></FONT> </DIV>
<DIV><IMG src="cid:C168A9E672CD49089993A3078CC22F2E@DavidNockHP"> </DIV>
<DIV>Best,<FONT face=Calibri> </FONT></DIV>
<DIV><FONT face=Calibri><BR><FONT face="Lucida Bright">Dan
Corning</FONT></FONT></DIV>
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