As far as air in the oil pressure line is concerned, some have the opinion
that the air needs to be bled out of the line for the gauge to display the
correct pressure. However, my experience was different.
Shortly after I replaced the flexible oil line on my BJ8, there was a
discussion on the list about the need to bleed the line. Realizing I had
not done that and was seeing less pressure than I would expect after a
rebuild, I went out and bled it by starting the engine, then cracking the
nut and letting the oil drip for several minutes into a pan before
re-tightening the nut. When I looked at the gauge, the needle was vibrating
so rapidly that I thought it would break. Then I disconnected the hard line
to the gauge for a minute, then reconnected it. The gauge needle was as
steady as before I bled the line.
My conclusion is that air in the line is necessary to dampen the pressure
pulses from the oil pump and it is not only not necessary but
counterproductive to bleed it.
Steve Byers
HBJ8L/36666
BJ8 Registry
Havelock, NC
-----Original Message-----
From: healeys-bounces@autox.team.net [mailto:healeys-bounces@autox.team.net]
On Behalf Of Robert Duquette
That's a lot of "what ifs". :)
I have a bad memory, so correct me if I'm wrong. Here's the way I remember
the issue:- he had more oil pressure before he rebuilt his engine- he
replaced
the oil pressure relief valve ( or just the spring? ) as part of the
rebuild- His original question was regarding whether air in the line to
the gauge could be affecting things.
"What if" he just put the old spring back in so that he's comparing apples
to
apples?
( while perhaps comparing the 2 springs for length while they're both in his
hand. I'm not sure how you would compare the strength of the springs.
Someone
knows. )
I believe the response that he got to the "air in the line" question was
that
"pressure was pressure", but I really don't think that it would hurt to try
that. We tend not to like air in our brake lines. So what do you have to
lose besides time?
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