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Have you compared to another gauge? Maybe inline running the dash gauge too=
.=20
I have heard that a badly worn front cam bearing can cause low oil pressure i=
ssues. This bearing doesn't usually get replaced during a rebuild, even whe=
n the other cam bearings do, but they can get heavy wear.=20
Dave H.
Sent from my iPad
> On May 12, 2020, at 2:54 PM, andrew uprichard <auprichard@uprichard.net> w=
rote:
>=20
> Having (I think) sorted out the problem with the TR4, I took a recently-fi=
nished TR3B out for its second inaugural drive.
> =20
> The first inaugural drive went pretty well, but once the engine temp came u=
p, the oil pressure fell like a stone =E2=80=93 and here we are talking arou=
nd 40psi at 3000rpm and almost nothing at (what was hot) idle. Adjusting the=
pressure with the screw on the oil filter head did nothing.
> =20
> I checked everything over, even pulled the oil pan and checked all the bea=
rings (one main and 4 rods) =E2=80=93 all perfect. I really didn=E2=80=99t f=
ind 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 i=
tself is no longer obtainable).
> =20
> So today when I first took it out, the pressure was almost too high =E2=80=
=93 around 90 at 3000 rpm. But as soon as the engine warmed up, it again dr=
opped to scary levels. No leaks, no oil in water or vice versa.
> =20
> I am running out of ideas here. Could it be a bad oil filter head? Anyth=
ing else?
> =20
> Andrew Uprichard
> Jackson, Michigan
> ** triumphs@autox.team.net **
>=20
> Donate: http://www.team.net/donate.html
> Archive: http://www.team.net/pipermail/triumphs http://www.team.net/archi=
ve
>=20
> Unsubscribe/Manage: http://autox.team.net/mailman/options/triumphs/dlhogye=
@comcast.net
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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto"><div>Have you compared to another gauge? &n=
bsp;Maybe inline running the dash gauge too. </div><div id=3D"AppleMail=
Signature">I have heard that a badly worn front cam bearing can cause low oi=
l pressure issues. This bearing doesn't usually get replaced during a r=
ebuild, even when the other cam bearings do, but they can get heavy wear.&nb=
sp;</div><div id=3D"AppleMailSignature">Dave H.<br><br>Sent from my iPad</di=
v><div><br>On May 12, 2020, at 2:54 PM, andrew uprichard <<a href=3D"mail=
to:auprichard@uprichard.net">auprichard@uprichard.net</a>> wrote:<br><br>=
</div><blockquote type=3D"cite"><div><meta http-equiv=3D"Content-Type" conte=
nt=3D"text/html; charset=3Dus-ascii"><meta name=3D"Generator" content=3D"Mic=
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<o:idmap v:ext=3D"edit" data=3D"1" />
</o:shapelayout></xml><![endif]--><div class=3D"WordSection1"><p class=3D"Ms=
oNormal"><span style=3D"font-family:"Times New Roman",serif">Havin=
g (I think) sorted out the problem with the TR4, I took a recently-finished T=
R3B out for its second inaugural drive.<o:p></o:p></span></p><p class=3D"Mso=
Normal"><span style=3D"font-family:"Times New Roman",serif"><o:p>&=
nbsp;</o:p></span></p><p class=3D"MsoNormal"><span style=3D"font-family:&quo=
t;Times New Roman",serif">The first inaugural drive went pretty well, b=
ut once the engine temp came up, the oil pressure fell like a stone =E2=80=93=
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=3D"MsoNormal"><span style=3D"fon=
t-family:"Times New Roman",serif"><o:p> </o:p></span></p><p c=
lass=3D"MsoNormal"><span style=3D"font-family:"Times New Roman",se=
rif">I checked everything over, even pulled the oil pan and checked all the b=
earings (one main and 4 rods) =E2=80=93 all perfect. I really didn=E2=80=
=99t 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 v=
alve itself is no longer obtainable).<o:p></o:p></span></p><p class=3D"MsoNo=
rmal"><span style=3D"font-family:"Times New Roman",serif"><o:p>&nb=
sp;</o:p></span></p><p class=3D"MsoNormal"><span style=3D"font-family:"=
Times New Roman",serif">So today when I first took it out, the pressure=
was almost too high =E2=80=93 around 90 at 3000 rpm. But as soon as t=
he engine warmed up, it again dropped to scary levels. No leaks, no oil in w=
ater or vice versa.<o:p></o:p></span></p><p class=3D"MsoNormal"><span style=3D=
"font-family:"Times New Roman",serif"><o:p> </o:p></span></p>=
<p class=3D"MsoNormal"><span style=3D"font-family:"Times New Roman"=
;,serif">I am running out of ideas here. Could it be a bad oil filter h=
ead? Anything else?<o:p></o:p></span></p><p class=3D"MsoNormal"><span s=
tyle=3D"font-family:"Times New Roman",serif"><o:p> </o:p></sp=
an></p><p class=3D"MsoNormal"><span style=3D"font-family:"Times New Rom=
an",serif">Andrew Uprichard<o:p></o:p></span></p><p class=3D"MsoNormal"=
><span style=3D"font-family:"Times New Roman",serif">Jackson, Mich=
igan<o:p></o:p></span></p></div></div></blockquote><blockquote type=3D"cite"=
><div><span>** <a href=3D"mailto:triumphs@autox.team.net";>triumphs@autox.tea=
m.net</a> **</span><br><span></span><br><span>Donate: <a href=3D"http://www.=
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t/pipermail/triumphs</a> <a href=3D"http://www.team.net/archive";>http:=
//www.team.net/archive</a></span><br><span></span><br><span>Unsubscribe/Mana=
ge: <a href=3D"http://autox.team.net/mailman/options/triumphs/dlhogye@comcas=
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></span><br></div></blockquote></body></html>=
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