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--- Russell Duffy <13brv3@bellsouth.net> wrote:
I am wondering if being overfull was the cause.
Being overfull certainly won't help. If the oil
gets high enough to get
back on the oil pump chain, or counterweight, it
will get foamed up, and
that helps it escape. Did you run the engine any
with the plane parked on
it's nose? On deceleration (belly brake ?), do you
think you could be
sloshing oil forward I didn't run it with it on its' nose, but descending
to land was nose low, but it was a pretty shallow
glide. Nothing different than usual.
Originally there was a tube from the crankcase vent
to
a fitting on the side of the filler tube. Now I'm confused. How many vents do you have? You
only need one, usually
the one on the filler tube. All this does is keep
the pan area from being a
sealed container, to allow room for expansion and
contraction when the oil
heats up. It will also vent off any combustion
pressure that gets by the
side seals. Maybe I'm using the wrong term. This vent is located
on the center housing very near the filler tube. I
believe that there was a tube on the engine originally
that went from it to a port on the filler neck, but I
very well may be wrong. The only time I ever got any significant oil
discharge is when I happened to
put the vent line in a low pressure area with lots
of airflow. It seemed to
suck it out under those conditions, but moving the
vent to another point
stopped it. It sounds like your vent line is still
inside the cowl, but is
it in an area that might be getting a lot of
airflow, causing a negative
pressure?
I don't know, but it is near the top of the cowling. Originally I didn't have anything hooked to it at all,
but after hearing about some others have oil
discharge, I hooked up a piece of tubing to it and ran
it up near the top of the cowling. I didn't have any
oil come out before today, and I've made, I guess,
about 4 flights since adding the tube. Maybe I just
need to take the tube back off !
Glad to hear the temps are behaving, but at twice
around the pattern every
weekend, you're going to beat my longest time to 40
hours record :-)
I'm well aware of the record, but hoping to avoid it.
Here lately, I've been having so many issues, that
I've stopped feeling sorry for John. Instead I feel
sorry for me.
Steve
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