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That is absolutely true for the TR2-TR6 at least. There are flats in the re=
ar cam bearing that provide the pumping action. If you install cam bearings=
in a TR6 you have to be sure to align the hole in the bearing with the oil=
feed hole to the head otherwise the rocker gear will have no oil feed. If =
you run the oil pump with a drill you will observe no oil getting to the he=
ad but that is not a cause for concern.
Stan
From: Triumphs <triumphs-bounces@autox.team.net> On Behalf Of andrew uprich=
ard
Sent: Saturday, May 16, 2020 7:38 AM
To: 'Reihing, Randall S.' <Randall.Reihing@utoledo.edu>; 'Alex & Janet Thom=
son' <aljlthomson@charter.net>; triumphs@autox.team.net
Subject: Re: [TR] [EXTERNAL] Re: Ideas, anyone?
If you spin an oil pump with a long screwdriver bit on a drill, you will ge=
t oil pressure, but no feed to the head, which makes me think the rear cam =
bearing is just responsible for the latter. But I could be wrong.
Andrew Uprichard
Jackson, Michigan
ng@utoledo.edu>>
Sent: Friday, May 15, 2020 10:08 PM
Subject: Re: [EXTERNAL] Re: [TR] Ideas, anyone?
Don't know for sure on TR4's but some engines source their oil pressure fro=
m the rear cam bearing, not the oil pump, mains or rod bearings. Where does=
the TR4 source it's oil pressure? If it comes from the rear cam bearing an=
d if that clearance is excessive it could result in a very low pressure at =
idle with hot oil. Oil pumps are volumetric flow pumps not necessarily pres=
sure pumps, so you might be fine if the oil pressure gauge senses it's pres=
sure indication from the rear cam bearing. Just a thought.
Randall Reihing
1959 TR3A
________________________________
ox.team.net>> on behalf of andrew uprichard <auprichard@uprichard.net<mailt=
o:auprichard@uprichard.net>>
Sent: Wednesday, May 13, 2020 7:34 AM
Subject: [EXTERNAL] Re: [TR] Ideas, anyone?
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..=
...
ter.net>>
Sent: Wednesday, May 13, 2020 5:58 AM
Subject: RE: [TR] Ideas, anyone?
Was the crankshaft cut down by a previous owner for use with undersize bear=
ing shells? I saw this happen in a Nuffield tractor once. Great oil pressur=
e at startup but diminishing quickly as the oil thinned out.
Alex Thomson
From: Triumphs [mailto:triumphs-bounces@autox.team.net] On Behalf Of andrew=
uprichard
Sent: Tuesday, May 12, 2020 5:54 PM
Subject: [TR] Ideas, anyone?
Having (I think) sorted out the problem with the TR4, I took a recently-fin=
ished TR3B out for its second inaugural drive.
The first inaugural drive went pretty well, but once the engine temp came u=
p, the oil pressure fell like a stone - and here we are talking around 40ps=
i at 3000rpm and almost nothing at (what was hot) idle. Adjusting the press=
ure with the screw on the oil filter head did nothing.
I checked everything over, even pulled the oil pan and checked all the bear=
ings (one main and 4 rods) - all perfect. I really didn't find anything, a=
nd 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 l=
onger obtainable).
So today when I first took it out, the pressure was almost too high - aroun=
d 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.
I am running out of ideas here. Could it be a bad oil filter head? Anythi=
ng else?
Andrew Uprichard
Jackson, Michigan
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<div class=3D"WordSection1">
<p class=3D"MsoNormal">That is absolutely true for the TR2-TR6 at least. Th=
ere are flats in the rear cam bearing that provide the pumping action. If y=
ou install cam bearings in a TR6 you have to be sure to align the hole in t=
he bearing with the oil feed hole
to the head otherwise the rocker gear will have no oil feed. If you run th=
e oil pump with a drill you will observe no oil getting to the head but tha=
t is not a cause for concern.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p> </o:p></p>
<p class=3D"MsoNormal">Stan<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p> </o:p></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b>From:</b> Triumphs <triumphs-bounces@autox.tea=
m.net> <b>On Behalf Of
</b>andrew uprichard<br>
<b>Sent:</b> Saturday, May 16, 2020 7:38 AM<br>
<b>To:</b> 'Reihing, Randall S.' <Randall.Reihing@utoledo.edu>; 'Alex=
& Janet Thomson' <aljlthomson@charter.net>; triumphs@autox.team.=
net<br>
<b>Subject:</b> Re: [TR] [EXTERNAL] Re: Ideas, anyone?<o:p></o:p></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p> </o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:"Times New Roman&quo=
t;,serif;color:#1F497D">If you spin an oil pump with a long screwdriver bit=
on a drill, you will get oil pressure, but no feed to the head, which make=
s me think the rear cam bearing is just responsible
for the latter. But I could be wrong. <o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:"Times New Roman&quo=
t;,serif;color:#1F497D"><o:p> </o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:"Times New Roman&quo=
t;,serif;color:#1F497D">Andrew Uprichard<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:"Times New Roman&quo=
t;,serif;color:#1F497D">Jackson, Michigan<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:"Times New Roman&quo=
t;,serif;color:#1F497D"><o:p> </o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b>From:</b> Reihing, Randall S. <<a href=3D"mail=
to:Randall.Reihing@utoledo.edu">Randall.Reihing@utoledo.edu</a>>
<br>
<b>Sent:</b> Friday, May 15, 2020 10:08 PM<br>
<b>To:</b> andrew uprichard <<a href=3D"mailto:auprichard@uprichard.net"=
>auprichard@uprichard.net</a>>; 'Alex & Janet Thomson' <<a href=
=3D"mailto:aljlthomson@charter.net";>aljlthomson@charter.net</a>>;
<a href=3D"mailto:triumphs@autox.team.net";>triumphs@autox.team.net</a><br>
<b>Subject:</b> Re: [EXTERNAL] Re: [TR] Ideas, anyone?<o:p></o:p></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p> </o:p></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:black">Don't k=
now for sure on TR4's but some engines source their oil pressure from the r=
ear cam bearing, not the oil pump, mains or rod bearings. Where does the TR=
4 source it's oil pressure? If it comes
from the rear cam bearing and if that clearance is excessive it could resu=
lt in a very low pressure at idle with hot oil. Oil pumps are volumetric fl=
ow pumps not necessarily pressure pumps, so you might be fine if the oil pr=
essure gauge senses it's pressure
indication from the rear cam bearing. Just a thought. <o:p></o:p></sp=
an></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:black"><o:p>&n=
bsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:black">Randall=
Reihing<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:black">1959 TR=
3A <o:p></o:p></span></p>
</div>
<div class=3D"MsoNormal" align=3D"center" style=3D"text-align:center">
<hr size=3D"1" width=3D"98%" align=3D"center">
</div>
<div id=3D"divRplyFwdMsg">
<p class=3D"MsoNormal"><b><span style=3D"color:black">From:</span></b><span=
style=3D"color:black"> Triumphs <<a href=3D"mailto:triumphs-bounces@aut=
ox.team.net">triumphs-bounces@autox.team.net</a>> on behalf of andrew up=
richard <<a href=3D"mailto:auprichard@uprichard.net";>auprichard@uprichar=
d.net</a>><br>
<b>Sent:</b> Wednesday, May 13, 2020 7:34 AM<br>
<b>To:</b> 'Alex & Janet Thomson' <<a href=3D"mailto:aljlthomson@cha=
rter.net">aljlthomson@charter.net</a>>;
<a href=3D"mailto:triumphs@autox.team.net";>triumphs@autox.team.net</a> <=
<a href=3D"mailto:triumphs@autox.team.net";>triumphs@autox.team.net</a>><=
br>
<b>Subject:</b> [EXTERNAL] Re: [TR] Ideas, anyone?</span> <o:p></o:p></p>
<div>
<p class=3D"MsoNormal"> <o:p></o:p></p>
</div>
</div>
<div>
<div>
<p class=3D"xmsonormal"><span style=3D"font-family:"Times New Roman&qu=
ot;,serif;color:#1F497D">Thanks for al the suggestions. Gauge is good=
, have tried a new oil pump. I think the next step is to plasti=
gauge the bearings and check the rocker shaft, as suggested.
Then I guess the engine will have to come out. Sigh…..</span><o:p></=
o:p></p>
<p class=3D"xmsonormal"><span style=3D"font-family:"Times New Roman&qu=
ot;,serif;color:#1F497D"> </span><o:p></o:p></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"xmsonormal"><b>From:</b> Alex & Janet Thomson <<a href=
=3D"mailto:aljlthomson@charter.net";>aljlthomson@charter.net</a>>
<br>
<b>Sent:</b> Wednesday, May 13, 2020 5:58 AM<br>
<b>To:</b> 'andrew uprichard' <<a href=3D"mailto:auprichard@uprichard.ne=
t">auprichard@uprichard.net</a>>;
<a href=3D"mailto:triumphs@autox.team.net";>triumphs@autox.team.net</a><br>
<b>Subject:</b> RE: [TR] Ideas, anyone?<o:p></o:p></p>
</div>
</div>
<p class=3D"xmsonormal"> <o:p></o:p></p>
<p class=3D"xmsonormal"><span style=3D"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><o:p></o:p></p>
<p class=3D"xmsonormal"><span style=3D"font-size:12.0pt;color:#1F497D">&nbs=
p;</span><o:p></o:p></p>
<p class=3D"xmsonormal"><span style=3D"font-size:12.0pt;color:#1F497D">Alex=
Thomson</span><o:p></o:p></p>
<p class=3D"xmsonormal"><span style=3D"font-size:12.0pt;color:#1F497D">&nbs=
p;</span><o:p></o:p></p>
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"xmsonormal"><b><span style=3D"font-size:10.0pt;font-family:&quo=
t;Tahoma",sans-serif">From:</span></b><span style=3D"font-size:10.0pt;=
font-family:"Tahoma",sans-serif"> Triumphs [<a href=3D"mailto:tri=
umphs-bounces@autox.team.net">mailto:triumphs-bounces@autox.team.net</a>]
<b>On Behalf Of </b>andrew uprichard<br>
<b>Sent:</b> Tuesday, May 12, 2020 5:54 PM<br>
<b>To:</b> <a href=3D"mailto:triumphs@autox.team.net";>triumphs@autox.team.n=
et</a><br>
<b>Subject:</b> [TR] Ideas, anyone?</span><o:p></o:p></p>
</div>
</div>
<p class=3D"xmsonormal"> <o:p></o:p></p>
<p class=3D"xmsonormal"><span style=3D"font-family:"Times New Roman&qu=
ot;,serif">Having (I think) sorted out the problem with the TR4, I took a r=
ecently-finished TR3B out for its second inaugural drive.</span><o:p></o:p>=
</p>
<p class=3D"xmsonormal"><span style=3D"font-family:"Times New Roman&qu=
ot;,serif"> </span><o:p></o:p></p>
<p class=3D"xmsonormal"><span style=3D"font-family:"Times New Roman&qu=
ot;,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 ta=
lking around 40psi at 3000rpm and almost nothing at
(what was hot) idle. Adjusting the pressure with the screw on the oil filt=
er head did nothing.</span><o:p></o:p></p>
<p class=3D"xmsonormal"><span style=3D"font-family:"Times New Roman&qu=
ot;,serif"> </span><o:p></o:p></p>
<p class=3D"xmsonormal"><span style=3D"font-family:"Times New Roman&qu=
ot;,serif">I checked everything over, even pulled the oil pan and checked a=
ll the bearings (one main and 4 rods) – all perfect. I really d=
idn’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 o=
il filter head (the valve itself is no longer obtainable).</span><o:p></o:p=
></p>
<p class=3D"xmsonormal"><span style=3D"font-family:"Times New Roman&qu=
ot;,serif"> </span><o:p></o:p></p>
<p class=3D"xmsonormal"><span style=3D"font-family:"Times New Roman&qu=
ot;,serif">So today when I first took it out, the pressure was almost too h=
igh – around 90 at 3000 rpm. But as soon as the engine warmed u=
p, it again dropped to scary levels. No leaks, no oil in
water or vice versa.</span><o:p></o:p></p>
<p class=3D"xmsonormal"><span style=3D"font-family:"Times New Roman&qu=
ot;,serif"> </span><o:p></o:p></p>
<p class=3D"xmsonormal"><span style=3D"font-family:"Times New Roman&qu=
ot;,serif">I am running out of ideas here. Could it be a bad oil filt=
er head? Anything else?</span><o:p></o:p></p>
<p class=3D"xmsonormal"><span style=3D"font-family:"Times New Roman&qu=
ot;,serif"> </span><o:p></o:p></p>
<p class=3D"xmsonormal"><span style=3D"font-family:"Times New Roman&qu=
ot;,serif">Andrew Uprichard</span><o:p></o:p></p>
<p class=3D"xmsonormal"><span style=3D"font-family:"Times New Roman&qu=
ot;,serif">Jackson, Michigan</span><o:p></o:p></p>
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