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Chris,
Did you just have your engine apart?
If so, did you have oil pressure after that? Oil from the pump
comes out of the lower front housing and goes to the cooler. Did you
check to see if oil is coming from the first opening after the pump? If it
is not, the problem is inside the engine, if oil is coming from the pump, the
problem is outside the engine. Cooler, filter, hose, etc, don’t tear
it down unless you have to. If you didn’t use a mandrel when you
made up your hoses, you could have a sliver of the inside of the hose blocking
the oil flow.
Bill B
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On
Behalf Of Chris Barber
Sent: Tuesday, September 28, 2010
11:26 PM
To: Rotary
motors in aircraft
Subject: [FlyRotary] Re: Oil
Pressure Loss
Oh, and maybe this is too obvious, but
when I drop the pan, what should I be looking for. Yeah, large metal
shards I would figure out, but if it is not that obvious, where do I need to
focus. The pressure gage?? The pump?? Something else??
From: Rotary
motors in aircraft [flyrotary@lancaironline.net] on behalf of
Chris Barber
[cbarber@texasattorney.net]
Sent: Tuesday, September 28, 2010
10:11 PM
To: Rotary
motors in aircraft
Subject: [FlyRotary] Re: Oil
Pressure Loss
Geeesh...the mouse froze again.
To continue, I got a moderate, steady
stream of oil coming from the remote filter mount. So, I had some
flow. I then went to the end of the hoses where it re-enters the engine
after flowing through the two oil coolers. Well, here there was no
joy. No oil coming out. I did refill the filter before I
reinstalled it and cranked the engine for quite a while to no avail.
Next, I unhooked a few of the other hose connections past the filter and still
no flow when cranking. Finally, I checked all the way back to the filter
outlet and no oil would come out. I changed to a different filter and
still no flow from out of the filter. So, I have some flow....not a lot
into the filter buy none out.
I HATE the idea of dropping the pan
(will be a real pain) to check the oil pump and pressure gage, but I am not
quite sure as what else to check at this point. When I return tomorrow, I
will remove the plugs to take some of the stress off the starter and see if I
get flow out of the filter. I am also concerned now that I have
been cranking the system long enough that some important parts are
not running with a lot of needed oil, such as the PSRU etc.
If I would have just happened to look at
the OP gauge, I would have never known there was a problem as the engine
"sounded" strong and smooth and continued to do so when I started it
to test my pressure after discovering the problems.
Hopefully this will be a bit
more directly answered by the engine guru types on the list since it is
not specific to Tracy's
electronics.
Please, what else should I check, I am
about at the end of my testing skill set. Also, what say ye as to what
the problem "sounds" like????
From: Rotary
motors in aircraft [flyrotary@lancaironline.net] on behalf of
Chris Barber
[cbarber@texasattorney.net]
Sent: Tuesday, September 28, 2010
9:59 PM
To: Rotary
motors in aircraft
Subject: [FlyRotary] Re: Oil
Pressure Loss
Aggg. I need a new computer. The
mouse froze and the message sent prematurly.
Anyway, I rechecked the wires to
the EM2 and at the sensor again and all checked fine. Again, I
started the engine, but was shut down as soon as I still saw no pressure.
Next, I hooked up two separate
mechanical pressure gages in three different locations in the oil system,
started the engine three times very briefly. Each time the engin
started and seemed to run fine for the VERY short time I allowed it to
run. No pressure reading on two of the test points, and about 6psi
on the reading from the turbor engine outlet to the turbo.
Ok, I unscrewed the oil filter, which is
located remotely just as the oil comes out of the front (by
the pully's oposite the prop) of the engine. I hooked up a
remote start switch, climbed under the engine and cranked the engie.....I got a
moderate, steady flow of oil
From: Rotary
motors in aircraft [flyrotary@lancaironline.net] on behalf of
Chris Barber
[cbarber@texasattorney.net]
Sent: Tuesday, September 28, 2010
9:42 PM
To: Rotary
motors in aircraft
Subject: [FlyRotary] Oil Pressure
Loss
In the never ending tradition of two
step forward and three steps back, I was working on my RPM drop out at
6000 rmp (messed with seveal resistors to no avail). As I was
sitting on the ramp at idle for a few minutes, focusing on the RPM's
I glanced over at the Oil Pressure and noted it was flashing as an alert and
was showing almost NO oil pressure (4 or 5 psi). I instantly shut down
the engine.
The engine appeared to be running fine
before I shut it down. I checked the wire to the back of the engine
monitor and all was fine. I also checked the continutiy of the wire
to the sensor and it was good. I started the engine again and it started
fine and seem to run fine, however, the OP did not kick in so I shut it down
again
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