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Problem 1: How do you know the engine is running rich? Is it OK at
idling (blue on the ColorTune: correct, orange: rich), are the plugs
black after a long stretch?
Problem 2: What is your oil pressure at say 2500rpm and at idle when the
engine is really hot after a long high speed run. Is the oil pressure
slightly dipping when you blip the engine when hot?
If at start up after only one night you can actually hear the bearings
rumbling/rattling I would suspect worn bearings or, but unlikely, the
wrong oil (way to thin) if you are lucky.
Other causes can be:
faulty/absent non return valve in the oil filter
small leak in the suction part of the oil pump circuit
Never start a cold engine using the throttle to rev it up immediately
after firing. Let it idle until you read oil pressure. On my JH car it
can take over 20 seconds before I have oil pressure.
Kees Oudesluijs
Keith Taylor schreef op 24-6-2015 om 8:36:
> G'Day
>
> Problem 1
>
> I have a BN2 with Le Mans upgrades , 1 3/4 carbys with OA6 needles &
> the car is running very rich,
> I have ordered weaker OA8 needles hoping to sort out this problem .
> However this car has flat top pistons hence much higher compression .
> Am I going down the right road .
>
> Problem 2
>
> This car left standing overnight ,on startup has a severe bearing
> rattle , my long time mechanic ( retired, read old ex BMC man) is of
> the opinion
> that the spin off filter non-return is failing The oil release valve
> seems to be in good condition. Startup now is to crank over without
> starting
> to get oil pressure up then fire up , Subsequent startups are not a
> problem
>
> Keith Taylor
> Southern Highlands OZ
>
> BN1
> BN2
>
>
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> Versie: 2015.0.6030 / Virusdatabase: 4365/10087 - datum van uitgifte:
> 06/23/15
>
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<div class="moz-cite-prefix">Problem 1: How do you know the engine
is running rich? Is it OK at idling (blue on the ColorTune:
correct, orange: rich), are the plugs black after a long stretch?<br>
<br>
Problem 2: What is your oil pressure at say 2500rpm and at idle
when the engine is really hot after a long high speed run. Is the
oil pressure slightly dipping when you blip the engine when hot?<br>
<br>
If at start up after only one night you can actually hear the
bearings rumbling/rattling I would suspect worn bearings or, but
unlikely, the wrong oil (way to thin) if you are lucky.<br>
Other causes can be:<br>
faulty/absent non return valve in the oil filter<br>
small leak in the suction part of the oil pump circuit<br>
<br>
Never start a cold engine using the throttle to rev it up
immediately after firing. Let it idle until you read oil pressure.
On my JH car it can take over 20 seconds before I have oil
pressure.<br>
<br>
Kees Oudesluijs<br>
<br>
<br>
Keith Taylor schreef op 24-6-2015 om 8:36:<br>
</div>
<blockquote
cite="mid:CAJBOvRTtFpD6viYFifpoVoqAnf2qXQ-Fkk+C6OKVBPSwZyFHDQ@mail.gmail.com"
type="cite">
<meta http-equiv="Context-Type" content="text/html; charset=UTF-8">
<div dir="ltr">
<div>G'Day </div>
<div><br>
</div>
<div>Problem 1Â </div>
<div><br>
</div>
<div> I have a BN2 with Le Mans upgrades , 1 3/4 carbys with
OA6 needles & the car is running very rich,</div>
<div>I have ordered weaker OA8 needles hoping to sort out this
problem . However this car has flat top pistons hence much
higher compression .</div>
<div>Am I going down the right road .</div>
<div><br>
</div>
<div>Problem 2</div>
<div><br>
</div>
<div>This car left standing overnight ,on startup has a severe
bearing rattle , my long time mechanic ( retired, read old ex
BMC man)Â is of the opinion </div>
<div>that the spin off filter non-return is failing The oil
release valve seems to be in good condition. Startup now is to
crank over without starting</div>
<div> to get oil pressure up then fire up , Subsequent startups
are not a problem</div>
<div><br>
</div>
<div>Keith Taylor</div>
<div>Southern Highlands OZ</div>
<div><br>
</div>
<div>BN1</div>
<div>BN2</div>
</div>
<br>
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<meta http-equiv="Context-Type" content="text/html; charset=UTF-8">
<p class="">Geen virus gevonden in dit bericht.<br>
Gecontroleerd door AVG - <a moz-do-not-send="true"
href="http://www.avg.com";>www.avg.com</a><br>
Versie: 2015.0.6030 / Virusdatabase: 4365/10087 - datum van
uitgifte: 06/23/15</p>
</blockquote>
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