[Healeys] Oil pressure gauge response

[J. Scott Morris]

HelloStephen;    A longtime ago, back on October 15 2001, Adnan Merchant asked about a delay in oilpressure: “If there is a delay, might it imply that there is air in the line orsome other restriction somewhere?” In response, Michael Salter wrote:  “Hi Adnan,  There is a restrictor at the block on the oil pressure line. If the line is full of air the pressure takes some time to build on the gauge, particularly when cold, because sufficient oil has to pass through the restrictor to compress the air in the line to the indicated pressure.  If the line is bled at the gauge, to remove all the air, the pressure reading should be almost instantaneous because, of course, oil is not very compressible.” This may help you figure it out. --Scott Morris; Simcoe, Ontario, Canada         - Keep Smiling, Murphy Lives 

    On Wednesday, August 31, 2016 9:30 PM, Stephen Hutchings <s.hutchings at rogers.com> wrote:
 

 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

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