..oil pressure gauges on the whole are pretty dumb, that is to say there is
no computer doing millions of computations that are causing the needle to
flutter a bit.
There are, however, a number of reasons. The pressure relief spring is the
most likely to weaken and cause this by a flutter of the seal in the bore. A
single worn bearing on the crank, cam or rocker shaft. A slightly larger gap
on one side of the pump housing might do it.
I would be more concerned with the volume being distributed than with total
pressure. It takes very little pressure to distribute the lubricant
throughout the engine, in fact too much pressure will erode the bearings,
though I've never seen direct evidence of it happening.
And yes, I bleed the pressure sending line if it's been apart..
IMO,
dave
frogeye@porterscustom.com
Porter Customs 2909 Arno NE
Albuquerque, NM USA 87107
505-352-1378
1954 BN2 1959 AN5
Porter Custom Bicycles
cars:
www.britishcarforum.com/portercustoms.html
gallery:
http://picasaweb.google.com/porterscustombicycles/PorterCustomBicyclesStuff
blog: http://porterbikes.com/
-----Original Message-----
From: healeys-bounces@autox.team.net [mailto:healeys-bounces@autox.team.net]
On Behalf Of BJ8 Healeys
Sent: Thursday, September 30, 2010 6:31 PM
To: healeys@autox.team.net
Subject: Re: [Healeys] oil pressure relief valve
Isn't it odd and interesting how the designers of Healeys and their
component parts were able to get them to behave one way for one person, and
the opposite way for another person?
Steve Byers
HBJ8L/36666
BJ8 Registry
Havelock, NC USA
-----Original Message-----
From: healeys-bounces@autox.team.net [mailto:healeys-bounces@autox.team.net]
On Behalf Of Rich C
Sent: Thursday, September 30, 2010 8:07 PM
To: coudesluijs@chello.nl; rnbmail@yahoo.com; warthodson@aol.com
Cc: healeys@autox.team.net; Mark@autox.team.net
Subject: Re: [Healeys] oil pressure relief valve
I've never seen these gauge pulsations. However, I have often loosened the
fitting at the gauge on initial start up until oil appears, to get a good
reading. More than once, prior to bleeding off the air, I have seen
excessive pressure indicated at the gauge (80 to 90 PSI) until I bled the
air off, then got a good normal reading with relief pressures about 60 to 65
PSI.
I know this sounds opposite to the "air pocket needed" theory, but that's
been my experience.
Rich
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