Hi Steve, A new demonstrator did this before. It used to be a common
problem on first starts on a 914. Ther is a small check valve in the oil
feed line to the turbo. There is a small steel ball and spring in it. The
ball sticks sometimes whene they are new. Take it apart making sure there
isn't any debris in the valve and cycle it thru a few times by hand. What I
mean is push the ball down and let the spring return it a few times. Very
small parts so be careful. Whene you first run the plane make sure you
start it a few times the first day, that cycles the valve a few more times.
Jim Thursby
-----Original Message-----
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com]On Behalf Of Steve Hagar
Subject: Europa-List: Oil in the intake
My 914 has been installed for some time now (over a year) on the aircraft in
the garage. It has not been started yet however. Last weekend I removed
the sparkplugs and rotated the prop through to bring up the oil pressure
and get oil pumping through the engine. Received good pressure and
continued for about 2 minutes by hand.
Went out to the garage today and found a puddle of oil under the aircraft.
Removed the lower cowl and found the air filter saturated and dripping with
oil. Removed filter and observed turbo intake impeller area with mucho oil.
My initial assumption on this is that by turning the engine by hand I am
pressurizing the turbo sump. But since there are no exhaust gasses driving
the wheel there is no scavenging occurring and the oil is just filling
up the turbo housing. I am assuming that at the temperature the turbo runs
at is that it does not have conventional oil seals that could have been
damaged. Do I need to investigate the matter further or are my
assumptions correct? Input from the turboheads much appreciated. Thanks
Steve Hagar
A143 N40SH
Mesa, AZ
Steve Hagar
hagargs@earthlink.net
|