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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 bat=
ch?
> On May 13, 2020 at 7:34 AM andrew uprichard <auprichard@uprichard.net> wr=
ote:
>=20
>=20
> Thanks for al the suggestions. Gauge is good, have tried a new oil p=
ump. I think the next step is to plastigauge the bearings and check the r=
ocker shaft, as suggested. Then I guess the engine will have to come out. =
Sigh=E2=80=A6..
>=20
> =20
>=20
> From: Alex & Janet Thomson <aljlthomson@charter.net>
> Sent: Wednesday, May 13, 2020 5:58 AM
> To: 'andrew uprichard' <auprichard@uprichard.net>; triumphs@autox.tea=
m.net
> Subject: RE: [TR] Ideas, anyone?
>=20
> =20
>=20
> Was the crankshaft cut down by a previous owner for use with undersiz=
e bearing shells? I saw this happen in a Nuffield tractor once. Great oil p=
ressure at startup but diminishing quickly as the oil thinned out.
>=20
> =20
>=20
> Alex Thomson
>=20
> =20
>=20
> From: Triumphs [mailto:triumphs-bounces@autox.team.net] On Behalf Of =
andrew uprichard
> Sent: Tuesday, May 12, 2020 5:54 PM
> To: triumphs@autox.team.net mailto:triumphs@autox.team.net
> Subject: [TR] Ideas, anyone?
>=20
> =20
>=20
> Having (I think) sorted out the problem with the TR4, I took a recent=
ly-finished TR3B out for its second inaugural drive.
>=20
> =20
>=20
> The first inaugural drive went pretty well, but once the engine temp =
came up, the oil pressure fell like a stone =E2=80=93 and here we are talki=
ng around 40psi at 3000rpm and almost nothing at (what was hot) idle. Adjus=
ting the pressure with the screw on the oil filter head did nothing.
>=20
> =20
>=20
> I checked everything over, even pulled the oil pan and checked all th=
e bearings (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 ord=
ered a new pump as well as a new spring for the Purolator oil filter head (=
the valve itself is no longer obtainable).
>=20
> =20
>=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 a=
gain dropped to scary levels. No leaks, no oil in water or vice versa.
>=20
> =20
>=20
> I am running out of ideas here. Could it be a bad oil filter head? =
Anything else?
>=20
> =20
>=20
> Andrew Uprichard
>=20
> Jackson, Michigan
>=20
> ** triumphs@autox.team.net **
>=20
> Donate: http://www.team.net/donate.html
> Archive: http://www.team.net/pipermail/triumphs http://www.team.net/a=
rchive
>=20
> Unsubscribe/Manage: http://autox.team.net/mailman/options/triumphs/te=
rryrs@comcast.net
>=20
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<html>
<head>=20
<meta charset=3D"UTF-8">=20
</head>
<body>
<div style=3D"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 culpri=
t? Maybe a too thin variety got into a wrong bottle? Or maybe j=
ust a bad batch?
</div>
<blockquote type=3D"cite">
On May 13, 2020 at 7:34 AM andrew uprichard <auprichard@uprichard.net=
> wrote:=20
<br>=20
<br>
<div class=3D"ox-bce5156b55-WordSection1">
<p class=3D"ox-bce5156b55-MsoNormal"><span style=3D"font-family: 'Times=
New Roman',serif; color: #1f497d;">Thanks for al the suggestions. Ga=
uge is good, have tried a new oil pump. I think the next step i=
s to plastigauge the bearings and check the rocker shaft, as suggested.&nbs=
p; Then I guess the engine will have to come out. Sigh=E2=80=A6.. </span></=
p>
<p class=3D"ox-bce5156b55-MsoNormal"><span style=3D"font-family: 'Times=
New Roman',serif; color: #1f497d;"> </span></p>
<div>
<div style=3D"border: none; border-top: solid #E1E1E1 1.0pt; padding: =
3.0pt 0in 0in 0in;">
<p class=3D"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>Subjec=
t:</strong> RE: [TR] Ideas, anyone?</p>
</div>
</div>
<p class=3D"ox-bce5156b55-MsoNormal"> </p>
<p class=3D"ox-bce5156b55-MsoNormal"><span style=3D"font-size: 12.0pt; =
color: #1f497d;">Was the crankshaft cut down by a previous owner for use wi=
th undersize bearing shells? I saw this happen in a Nuffield tractor once. =
Great oil pressure at startup but diminishing quickly as the oil thinned ou=
t. </span></p>
<p class=3D"ox-bce5156b55-MsoNormal"><span style=3D"font-size: 12.0pt; =
color: #1f497d;"> </span></p>
<p class=3D"ox-bce5156b55-MsoNormal"><span style=3D"font-size: 12.0pt; =
color: #1f497d;">Alex Thomson </span></p>
<p class=3D"ox-bce5156b55-MsoNormal"><span style=3D"font-size: 12.0pt; =
color: #1f497d;"> </span></p>
<div>
<div style=3D"border: none; border-top: solid #B5C4DF 1.0pt; padding: =
3.0pt 0in 0in 0in;">
<p class=3D"ox-bce5156b55-MsoNormal"><strong><span style=3D"font-size=
: 10.0pt; font-family: 'Tahoma',sans-serif;">From:</span></strong><span sty=
le=3D"font-size: 10.0pt; font-family: 'Tahoma',sans-serif;"> Triumphs [<a h=
ref=3D"mailto:triumphs-bounces@autox.team.net";>mailto:triumphs-bounces@auto=
x.team.net</a>] <strong>On Behalf Of </strong>andrew uprichard<br><strong>S=
ent:</strong> Tuesday, May 12, 2020 5:54 PM<br><strong>To:</strong> <a href=
=3D"mailto:triumphs@autox.team.net";>triumphs@autox.team.net</a><br><strong>=
Subject:</strong> [TR] Ideas, anyone? </span></p>
</div>
</div>
<p class=3D"ox-bce5156b55-MsoNormal"> </p>
<p class=3D"ox-bce5156b55-MsoNormal"><span style=3D"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=3D"ox-bce5156b55-MsoNormal"><span style=3D"font-family: 'Times=
New Roman',serif;"> </span></p>
<p class=3D"ox-bce5156b55-MsoNormal"><span style=3D"font-family: 'Times=
New Roman',serif;">The first inaugural drive went pretty well, but once th=
e engine temp came up, the oil pressure fell like a stone =E2=80=93 and her=
e we are talking around 40psi at 3000rpm and almost nothing at (what was ho=
t) idle. Adjusting the pressure with the screw on the oil filter head did n=
othing. </span></p>
<p class=3D"ox-bce5156b55-MsoNormal"><span style=3D"font-family: 'Times=
New Roman',serif;"> </span></p>
<p class=3D"ox-bce5156b55-MsoNormal"><span style=3D"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) =E2=80=93 all perfect. =
I really didn=E2=80=99t find anything, and the specs on the oil pump looke=
d 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=3D"ox-bce5156b55-MsoNormal"><span style=3D"font-family: 'Times=
New Roman',serif;"> </span></p>
<p class=3D"ox-bce5156b55-MsoNormal"><span style=3D"font-family: 'Times=
New Roman',serif;">So today when I first took it out, the pressure was alm=
ost too high =E2=80=93 around 90 at 3000 rpm. But as soon as the engi=
ne warmed up, it again dropped to scary levels. No leaks, no oil in water o=
r vice versa. </span></p>
<p class=3D"ox-bce5156b55-MsoNormal"><span style=3D"font-family: 'Times=
New Roman',serif;"> </span></p>
<p class=3D"ox-bce5156b55-MsoNormal"><span style=3D"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=3D"ox-bce5156b55-MsoNormal"><span style=3D"font-family: 'Times=
New Roman',serif;"> </span></p>
<p class=3D"ox-bce5156b55-MsoNormal"><span style=3D"font-family: 'Times=
New Roman',serif;">Andrew Uprichard </span></p>
<p class=3D"ox-bce5156b55-MsoNormal"><span style=3D"font-family: 'Times=
New Roman',serif;">Jackson, Michigan </span></p>
</div>** triumphs@autox.team.net **=20
<br>=20
<br>Donate: http://www.team.net/donate.html=20
<br>Archive: http://www.team.net/pipermail/triumphs http://www.team.net/=
archive=20
<br>=20
<br>Unsubscribe/Manage: http://autox.team.net/mailman/options/triumphs/t=
erryrs@comcast.net=20
<br>
</blockquote>
<div style=3D"font-size: 12pt; font-family: helvetica,arial,sans-serif; c=
olor: #333333;" class=3D"default-style">
<br>
</div>=20
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Archive: http://www.team.net/pipermail/triumphs http://www.team.net/archive
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