Oil pressure problem

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?

"Larry Dighera" wrote in message
...
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?

The pressure is to high when the engine is first started then when warm its
to low.
No I have not contatcted Lycoming but I will try.

On Wed, 3 Jan 2007 16:03:33 -0800, "Aluckyguess" wrote in
:

The pressure is to high when the engine is first started then when warm its
to low.

Now I understand. How cold is it when you start? Perhaps you need an
engine heater in the winter. Where are you located. Is the aircraft
hangared?

You said it did this to high when cold and too low when warm syndrome
before the overhaul too?

What grade of break-in oil are you using?

No I have not contatcted Lycoming but I will try.

There's a trouble shooting guide he
http://www.lycoming.textron.com/main...ort/index.html

I am in Southern Ca. Engine now has over 200 hours and burns no oil.
"Larry Dighera" wrote in message
...
On Wed, 3 Jan 2007 16:03:33 -0800, "Aluckyguess" wrote in
:

The pressure is to high when the engine is first started then when warm
its
to low.

Now I understand. How cold is it when you start? Perhaps you need an
engine heater in the winter. Where are you located. Is the aircraft
hangared?

You said it did this to high when cold and too low when warm syndrome
before the overhaul too?

What grade of break-in oil are you using?

No I have not contatcted Lycoming but I will try.

There's a trouble shooting guide he
http://www.lycoming.textron.com/main...ort/index.html