On Wed, 3 Jan 2007 14:13:28 -0800, "Aluckyguess" wrote in
:

I have a Bonanza V35 with a IO 470. Before and after engine overhaul the oil
pressure after the engine warms up goes just into the red. They have tried
turning the pressure up but this seems to only make the pressure go up when
cold. If the temperature outside is real cool the pressure goes over 200
psi. The engine builder said its in spec. I think there is a problem
somewhere. I want the oil pressure to run in the green. Does anybody have
any ideas on what could be causing this. I'm afraid its going to blow the
gage out one cold morning.
Thanks


What is the oil pressure indication before it warms up?

I'm a little confused by why the pressure should be adjusted upwards
when it appears that your complaint is about it being too high, but
here are some ideas:

1. If it behaved that way before AND after the overhaul, the
source of problem may be in the metering circuit/piping (gage).

2. If the engine oil pressure is indeed too high, it may be the
result of an obstruction in the oil passages (sludge, foreign
object(s), that went unnoticed during rebuild.

Can you quantify the temperatures and pressures?

Have you considered contacting Lycoming/Continental?