This is a multi-part message in MIME format.
--===============3805357691150045017==
boundary="------------4D59AAD48B80104E21E03BAA"
This is a multi-part message in MIME format.
--------------4D59AAD48B80104E21E03BAA
Content-Transfer-Encoding: 7bit
Nothing to do with the air in the line to the oil pressure gauge. Air in
the line is needed to even out vibrations of the needle due to the small
pressure pulses from the oil pump. It is not uncommon that pressure
build up is delayed. How and why this happens and why within the same
make and type of engine it occurs or not is often unclear.
On my car (Jensen Healey) I can have pressure from cold (or hot for that
matter) practically instantaneous or it can last up to half a minute or
more. Most JH's/Lotus 907 engines show this delay and it is the most
extreme in any engine I have encountered.
Always start the engine without revving it. Leave it idling and do not
drive away until you have oil pressure.
It does not seem to harm the engine as on my first JH I did over
160.000mls without any degradation of the oil pressure and/or bearings.
Kees Oudesluijs
Op 31-8-2016 om 21:47 schreef Stephen Hutchings:
> Again, thanks to everyone who replied to the BJ8 oil pressure survey-
> interesting variety of responses.
> My oil pressure figures fall well within the acceptable figures, but
> what I'm wondering about is the time it takes for the needle on the
> gauge to come up.
>
> I haven't actually timed this, but mine seems to take an uncomfortable
> length of time to come up on a cold start. Could this just be air in
> the line delaying the response of the gauge- the pressure relief
> valve...ideas?
> Whenever I change the oil filter it's full, so I don't think it's the
> filter filling up. I understand that this is a vague question until
> I've actually timed it, but I wondered if anyone else had had the same
> concern.
> Thanks,
>
> Stephen, BJ8
>
>
> _______________________________________________
> Support Team.Net http://www.team.net/donate.html
> Suggested annual donation $12.75
> Archive: http://www.team.net/archive
> Forums: http://www.team.net/forums
>
> Healeys@autox.team.net
> http://autox.team.net/mailman/listinfo/healeys
>
> Unsubscribe/Manage:
> http://autox.team.net/mailman/options/healeys/coudesluijs@chello.nl
>
--------------4D59AAD48B80104E21E03BAA
Content-Transfer-Encoding: 7bit
<html>
<head>
<meta content="text/html; charset=windows-1252"
http-equiv="Content-Type">
</head>
<body bgcolor="#FFFFFF" text="#000000">
<div class="moz-cite-prefix">Nothing to do with the air in the line
to the oil pressure gauge. Air in the line is needed to even out
vibrations of the needle due to the small pressure pulses from the
oil pump. It is not uncommon that pressure build up is delayed.
How and why this happens and why within the same make and type of
engine it occurs or not is often unclear.<br>
On my car (Jensen Healey) I can have pressure from cold (or hot
for that matter) practically instantaneous or it can last up to
half a minute or more. Most JH's/Lotus 907 engines show this delay
and it is the most extreme in any engine I have encountered.<br>
Always start the engine without revving it. Leave it idling and do
not drive away until you have oil pressure. <br>
It does not seem to harm the engine as on my first JH I did over
160.000mls without any degradation of the oil pressure and/or
bearings.<br>
Kees Oudesluijs<br>
<br>
Op 31-8-2016 om 21:47 schreef Stephen Hutchings:<br>
</div>
<blockquote
cite="mid:1243071703.2755766.1472672863475@mail.yahoo.com"
type="cite">
<meta http-equiv="Context-Type" content="text/html; charset=UTF-8">
<div>
<div id="yui_3_16_0_ym19_1_1472672124595_8935">Again, thanks to
everyone who replied to the BJ8 oil pressure survey-
interesting variety of responses.</div>
<div id="yui_3_16_0_ym19_1_1472672124595_9012">My oil pressure
figures fall well within the acceptable figures, but what I'm
wondering about is the time it takes for the needle on the
gauge to come up.</div>
<div id="yui_3_16_0_ym19_1_1472672124595_9056"><br>
</div>
<div id="yui_3_16_0_ym19_1_1472672124595_9057">I haven't
actually timed this, but mine seems to take an uncomfortable
length of time to come up on a cold start. Could this just be
air in the line delaying the response of the gauge- the
pressure relief valve...ideas?</div>
<div id="yui_3_16_0_ym19_1_1472672124595_9105">Whenever I change
the oil filter it's full, so I don't think it's the filter
filling up. I understand that this is a vague question until
I've actually timed it, but I wondered if anyone else had had
the same concern.</div>
<div id="yui_3_16_0_ym19_1_1472672124595_9178">Thanks,</div>
<div id="yui_3_16_0_ym19_1_1472672124595_9219"><br>
</div>
<div id="yui_3_16_0_ym19_1_1472672124595_9220">Stephen, BJ8<br>
</div>
</div>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<br>
<pre wrap="">_______________________________________________
Archive: <a class="moz-txt-link-freetext"
href="http://www.team.net/archive";>http://www.team.net/archive</a>
Forums: <a class="moz-txt-link-freetext"
href="http://www.team.net/forums";>http://www.team.net/forums</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>
</pre>
</blockquote>
<p><br>
</p>
</body>
</html>
--------------4D59AAD48B80104E21E03BAA--
--===============3805357691150045017==
Content-Transfer-Encoding: 7bit
Content-Disposition: inline
_______________________________________________
Archive: http://www.team.net/archive
Healeys@autox.team.net
http://autox.team.net/mailman/listinfo/healeys
--===============3805357691150045017==--
|