[Healeys] oil pressure relief valve

[warthodson at aol.com]

Are you suggesting that because there is a small orfice at the block, air must
be bled fron the tube? Why?
Given enought time oil will pass thru the orfice & compress the air until
equilibriam is reached & the gage will read the same pressure with or without
air in the line.
Gary


Should this be the case, air must be bled from the tube going
o the pressure gauge for a true reading
n the line







-----Original Message-----
From: Ray Carbone <racarbon at verizon.net>
To: healeys at autox.team.net
Sent: Fri, Oct 1, 2010 5:12 pm
Subject: Re: [Healeys] oil pressure relief valve


Hi All,

To contribute to the confusion, I decided to replace my original oil feed
flex
ube with a new one I had purchased a while ago from Victoria British.  As
ith most replacements, this unit was far less substantial and I was tempted
o reinstall the 47-year old original.  When extracting the original, I
nadvertently de-installed the adapter fitting attached to the engine and
oted the very small orifice through which the oil would flow.  Based upon
his very small passage, I am lead to think that this orifice is the mechanism
hat the engineers intended to buffer out the pulsations to secure a steady
auge reading.  Should this be the case, air must be bled from the tube going
o the pressure gauge for a true reading.

When starting the engine prior to bleed the air from the tube, the gauge gave
 stead reading of 20 lbs @ about 2500 RPMs using 20W50 cold.  After bleeding
he air, the gauge read 60 lbs @ about 2500 RPMs with an almost unperceivable
eedle vibration that I expect will probably disappear after a full run
possibly a very slight amount of air past the coupling and within the
auge).

Ray (64BJ8P1)
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