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I read somewhere--wish I could find the article--that later cams and, I
think, the DWM cams have an extra tooth or two to reduce overall wear on
the pump drive. The gear pumps create less resistance at higher RPMs so
better for racing (something tells me they might be cheaper to produce,
too). DWM only recommends the gear type for regular over 6K RPM use.
It's been a while but, IIRC, I discussed this with the tech guys at DWM
and they assured me it is not an issue with the HC pumps anymore, plus
their cams are gun-drilled so more internal oil 'leaks.'
On 12/30/2019 11:19 AM, Michael Salter wrote:
> /"(All of which begs the question as to why BMC switched from one to
> tâ??other!)"/
> I recall reading in a TSB that the change was made because it was
> found that the "rotor" pump was causing cam gear failures...
>
> M
> //
>
> On Mon, Dec 30, 2019 at 2:05 PM <simon.lachlan@alexarevel.plus.com
>
> Me too. DW â??High Capacityâ?? type pump which is their version of the
> older â??rotorâ?? type pump. It does a good job.
>
> The newer pumps are â??Gearâ?? type.
>
> I gathered, from people who know about these things, that the High
> Capacity is best all round and the Rotor only comes into its own
> at high revs.
>
> (All of which begs the question as to why BMC switched from one to
> tâ??other!)
>
> As to County, donâ??t know if theyâ??ve attempted an oil pump. Their
> water pump is an inferior item, for sure. I studied Michaelsâ?? blog
> on the topic and stripping down both original types and one County
> absolutely confirms what he says.
>
> Simon
>
> *From:*Healeys <healeys-bounces@autox.team.net
> *Sent:* 30 December 2019 16:53
> *To:* 'Michael Salter' <michaelsalter@gmail.com
> *Subject:* Re: [Healeys] Oil Pressure and replacing the oil pump
>
> I installed Denis Welch push rods, along with the DWR-1 cam and
> hollow lifters, when my engine was done. I also run a DWR high
> capacity oil pump. I run around 40 pounds at speed.
>
> Bruce Steele
>
> Brea, CA
>
> 1960 BN7
>
> *From:*Healeys [mailto:healeys-bounces@autox.team.net] *On Behalf
> Of *Michael Salter
> *Sent:* Monday, December 30, 2019 6:20 AM
> *Subject:* Re: [Healeys] Oil Pressure and replacing the oil pump
>
> Hi Robert, you are the second person that I have heard of who had
> that problem with "cheapo repo" push rods.
>
> It seems that those that are currently available are produced with
> too small a diameter of the cup so they seize on the rocker ball
> and break off.
>
> I would recommend that you inspect all the rocker ball ends
> carefully then install a set of good used push rods to prevent
> further problems.
>
> M
>
> BTW depending upon who supplied the bad parts you may be able to
> recover the costs involved.
>
> On Mon, Dec 30, 2019, 12:55 AM Robert Begani, <rfbegani@gmail.com
>
> When I rebuilt the engine last year I did not replace the oil
> pump because I had good oil pressure. Currently, from time to
> time, while breaking in the engine I am driving the car round
> trip 20-30 miles down the Tamiami Trail which is an open road
> for that stretch.. On a recent trip, the weather was cool, so
> the oil pressure was running 35 to 40 psi while the engine
> temperature was going up to 180 at 3000 rpm. At 4000 rpm the
> temperature climbed over 180 degrees and the oil pressure
> dropped below 30 psi. . I am considering replacing the oil
> pump and remember that there is a discussion about the quality
> of Moss pumps. Maybe I should buy the rebuild kit and change
> gears?
>
> Oh by the way, on the last run all hell broke loose and had
> the car towed home. Seems the mushroom on top of one of the
> push rods broke. So I am replacing all 12 of them.
>
> Regards,
>
> Bob Begani
>
> _______________________________________________
> Support Team.Net http://www.team.net/donate.html
> Suggested annual donation $12.75
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I read somewhere--wish I could find the article--that later cams
and, I think, the DWM cams have an extra tooth or two to reduce
overall wear on the pump drive. The gear pumps create less
resistance at higher RPMs so better for racing (something tells me
they might be cheaper to produce, too). DWM only recommends the
gear type for regular over 6K RPM use.<br>
<br>
It's been a while but, IIRC, I discussed this with the tech guys at
DWM and they assured me it is not an issue with the HC pumps
anymore, plus their cams are gun-drilled so more internal oil
'leaks.'<br>
<br>
<br>
<div class="moz-cite-prefix">On 12/30/2019 11:19 AM, Michael Salter
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAB3i7L+z-T+z7iL3ykNbkGvt4DddaaWAj+rq5=z34mmf2HtPkw@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="ltr">
<div class="gmail_default" style="font-family:comic sans
ms,sans-serif;font-size:small">
<span style="color:rgb(0,0,255)"><i><span
style="font-size:11pt;font-family:"Calibri",sans-serif">"(All
of which begs the question as to why BMC switched from
one to tâ??other!)"</span></i></span></div>
<div class="gmail_default" style="font-family:comic sans
ms,sans-serif;font-size:small"><span
style="color:rgb(0,0,255)"><span
style="font-size:11pt;font-family:"Calibri",sans-serif"><font
color="#000000">I recall reading in a TSB that the
change was made because it was found that the "rotor"
pump was causing cam gear failures... </font><br>
</span></span></div>
<div class="gmail_default" style="font-family:comic sans
ms,sans-serif;font-size:small"><span
style="color:rgb(0,0,255)"><span
style="font-size:11pt;font-family:"Calibri",sans-serif"><br>
</span></span></div>
<div class="gmail_default" style="font-family:comic sans
ms,sans-serif;font-size:small"><span
style="color:rgb(0,0,255)"><span
style="font-size:11pt;font-family:"Calibri",sans-serif"><span
style="color:rgb(0,0,0)">M</span><br>
</span></span></div>
<div class="gmail_default" style="font-family:comic sans
ms,sans-serif;font-size:small"><span
style="color:rgb(0,0,255)"><i><span
style="font-size:11pt;font-family:"Calibri",sans-serif"></span></i></span>
</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Mon, Dec 30, 2019 at 2:05
PM <<a href="mailto:simon.lachlan@alexarevel.plus.com";
moz-do-not-send="true">simon.lachlan@alexarevel.plus.com</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div lang="EN-GB">
<div class="gmail-m_-1916944789079687300WordSection1">
<p class="MsoNormal"><span
style="font-size:11pt;font-family:"Calibri",sans-serif">Me
too. DW â??High Capacityâ?? type pump which is their
version of the older â??rotorâ?? type pump. It does a good
job.</span></p>
<p class="MsoNormal"><span
style="font-size:11pt;font-family:"Calibri",sans-serif">The
newer pumps are â??Gearâ?? type.</span></p>
<p class="MsoNormal"><span
style="font-size:11pt;font-family:"Calibri",sans-serif">I
gathered, from people who know about these things,
that the High Capacity is best all round and the Rotor
only comes into its own at high revs.</span></p>
<p class="MsoNormal"><span
style="font-size:11pt;font-family:"Calibri",sans-serif">(All
of which begs the question as to why BMC switched from
one to tâ??other!)</span></p>
<p class="MsoNormal"><span
style="font-size:11pt;font-family:"Calibri",sans-serif">As
to County, donâ??t know if theyâ??ve attempted an oil
pump. Their water pump is an inferior item, for sure.
I studied Michaelsâ?? blog on the topic and stripping
down both original types and one County absolutely
confirms what he says.</span></p>
<p class="MsoNormal"><span
style="font-size:11pt;font-family:"Calibri",sans-serif">Simon</span></p>
<p class="MsoNormal"><span
style="font-size:11pt;font-family:"Calibri",sans-serif">Â </span></p>
<div>
<div style="border-color:rgb(225,225,225) currentcolor
currentcolor;border-style:solid none
none;border-width:1pt medium medium;padding:3pt 0cm
0cm">
<p class="MsoNormal"><b><span
style="font-size:11pt;font-family:"Calibri",sans-serif"
lang="EN-US">From:</span></b><span
style="font-size:11pt;font-family:"Calibri",sans-serif"
lang="EN-US"> Healeys <<a
href="mailto:healeys-bounces@autox.team.net";
target="_blank"
moz-do-not-send="true">healeys-bounces@autox.team.net</a>>
<b>On Behalf Of </b>Bruce Steele<br>
<b>Sent:</b> 30 December 2019 16:53<br>
<b>To:</b> 'Michael Salter' <<a
href="mailto:michaelsalter@gmail.com";
target="_blank"
moz-do-not-send="true">michaelsalter@gmail.com</a>>;
'Robert Begani' <<a
href="mailto:rfbegani@gmail.com"; target="_blank"
moz-do-not-send="true">rfbegani@gmail.com</a>><br>
<b>Cc:</b> <a
href="mailto:healeys@autox.team.net";
target="_blank"
moz-do-not-send="true">healeys@autox.team.net</a><br>
<b>Subject:</b> Re: [Healeys] Oil Pressure and
replacing the oil pump</span></p>
</div>
</div>
<p class="MsoNormal">Â </p>
<p class="MsoNormal"><span
style="font-family:"Trebuchet
MS",sans-serif" lang="EN-US">I installed Denis
Welch push rods, along with the DWR-1 cam and hollow
lifters, when my engine was done. I also run a DWR
high capacity oil pump. I run around 40 pounds at
speed.</span></p>
<p class="MsoNormal"><span
style="font-family:"Trebuchet
MS",sans-serif" lang="EN-US">Â </span></p>
<p class="MsoNormal"><span
style="font-family:"Trebuchet
MS",sans-serif;color:rgb(31,73,125)" lang="EN-US">Bruce
Steele</span></p>
<p class="MsoNormal"><span
style="font-family:"Trebuchet
MS",sans-serif;color:rgb(31,73,125)" lang="EN-US">Brea,
CA</span></p>
<p class="MsoNormal"><span
style="font-family:"Trebuchet
MS",sans-serif;color:rgb(31,73,125)" lang="EN-US">1960
BN7</span></p>
<p class="MsoNormal"><span
style="font-family:"Trebuchet
MS",sans-serif" lang="EN-US">Â </span></p>
<p class="MsoNormal"><b><span
style="font-size:11pt;font-family:"Calibri",sans-serif"
lang="EN-US">From:</span></b><span
style="font-size:11pt;font-family:"Calibri",sans-serif"
lang="EN-US"> Healeys [<a
href="mailto:healeys-bounces@autox.team.net";
target="_blank"
moz-do-not-send="true">mailto:healeys-bounces@autox.team.net</a>]
<b>On Behalf Of </b>Michael Salter<br>
<b>Sent:</b> Monday, December 30, 2019 6:20 AM<br>
<b>To:</b> Robert Begani <<a
href="mailto:rfbegani@gmail.com"; target="_blank"
moz-do-not-send="true">rfbegani@gmail.com</a>><br>
<b>Cc:</b> <a href="mailto:healeys@autox.team.net";
target="_blank"
moz-do-not-send="true">healeys@autox.team.net</a><br>
<b>Subject:</b> Re: [Healeys] Oil Pressure and
replacing the oil pump</span></p>
<p class="MsoNormal"><span lang="EN-US">Â </span></p>
<div>
<div>
<p class="MsoNormal"><span lang="EN-US">Hi Robert, you
are the second person that I have heard of who had
that problem with "cheapo repo" push rods.</span></p>
<div>
<p class="MsoNormal"><span lang="EN-US">It seems
that those that are currently available are
produced with too small a diameter of the cup so
they seize on the rocker ball and break off.</span></p>
</div>
<div>
<p class="MsoNormal"><span lang="EN-US">I would
recommend that you inspect all the rocker ball
ends carefully then install a set of good used
push rods to prevent further problems. </span></p>
</div>
<div>
<p class="MsoNormal"><span lang="EN-US">Â </span></p>
</div>
<div>
<p class="MsoNormal"><span lang="EN-US">M</span></p>
</div>
<div>
<p class="MsoNormal"><span lang="EN-US">Â </span></p>
</div>
<div>
<p class="MsoNormal"><span lang="EN-US">BTW
depending upon who supplied the bad parts you
may be able to recover the costs involved.</span></p>
</div>
<p class="MsoNormal" style="margin-bottom:12pt"><span
lang="EN-US">Â </span></p>
<div>
<div>
<p class="MsoNormal"><span lang="EN-US">On Mon,
Dec 30, 2019, 12:55 AM Robert Begani, <<a
href="mailto:rfbegani@gmail.com";
target="_blank"
moz-do-not-send="true">rfbegani@gmail.com</a>>
wrote:</span></p>
</div>
<blockquote style="border-color:currentcolor
currentcolor currentcolor
rgb(204,204,204);border-style:none none none
solid;border-width:medium medium medium
1pt;padding:0cm 0cm 0cm 6pt;margin:5pt 0cm 5pt
4.8pt">
<div>
<div>
<p class="MsoNormal"><span
style="font-family:"Arial",sans-serif"
lang="EN-US">When I rebuilt the engine
last year I did not replace the oil pump
because I had good oil pressure.Â
Currently, from time to time, while
breaking in the engine I am driving the
car round trip 20-30 miles down the
Tamiami Trail which is an open road for
that stretch.. On a recent trip, the
weather was cool, so the oil pressure was
running 35 to 40 psi while the engine
temperature was going up to 180 at 3000
rpm. At 4000 rpm the temperature climbed
over 180 degrees and the oil pressure
dropped below 30 psi. . I am considering
replacing the oil pump and remember that
there is a discussion about the quality of
Moss pumps. Maybe I should buy the
rebuild kit and change gears?</span><span
lang="EN-US"></span></p>
<p class="MsoNormal"><span
style="font-family:"Arial",sans-serif"
lang="EN-US">Â </span><span
lang="EN-US"></span></p>
<p class="MsoNormal"><span
style="font-family:"Arial",sans-serif"
lang="EN-US">Oh by the way, on the last
run all hell broke loose and had the car
towed home. Seems the mushroom on top of
one of the push rods broke. So I am
replacing all 12 of them.</span><span
lang="EN-US"></span></p>
<p class="MsoNormal"><span
style="font-family:"Arial",sans-serif"
lang="EN-US">Â </span><span
lang="EN-US"></span></p>
<p class="MsoNormal"><span
style="font-family:"Arial",sans-serif"
lang="EN-US">Regards,</span><span
lang="EN-US"></span></p>
<p class="MsoNormal"><span
style="font-family:"Arial",sans-serif"
lang="EN-US">Â </span><span
lang="EN-US"></span></p>
<p class="MsoNormal"><span
style="font-family:"Arial",sans-serif"
lang="EN-US">Bob Begani</span><span
lang="EN-US"></span></p>
</div>
</div>
<p class="MsoNormal" style="margin-bottom:12pt"><span
lang="EN-US">_______________________________________________<br>
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<fieldset class="mimeAttachmentHeader"></fieldset>
<pre class="moz-quote-pre"
wrap="">_______________________________________________
Archive: <a class="moz-txt-link-freetext"
href="http://www.team.net/pipermail/healeys";>http://www.team.net/pipermail/healeys</a>
<a class="moz-txt-link-freetext"
href="http://autox.team.net/archive";>http://autox.team.net/archive</a>
<a class="moz-txt-link-abbreviated"
href="mailto:Healeys@autox.team.net";>Healeys@autox.team.net</a>
<a class="moz-txt-link-freetext"
href="http://autox.team.net/mailman/listinfo/healeys";>http://autox.team.net/mailman/listinfo/healeys</a>
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