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1. 06:24 AM - no oil indicated oil pressure (Steven A Johnson)
2. 10:47 AM - Re: no oil indicated oil pressure (bill wade)
Message 1
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| Subject: | no oil indicated oil pressure |
I went to go flying last Sunday in my Yak 52 and immediately after starting
noticed I had no indicated oil pressure. I waited a couple of minutes to see
if it would come up but it never did so I shut her down. Preflight oil check
had indicated 10 liters of oil. Next I looked carefully at the oil pressure
gauge as I turned the power on and off and noticed the needle did move as
the instrument came alive. I tried restarting and noticed the oil pressure
was actually into the small yellow range on the dial but it normally is way
at the top of the green. I shut her down again and put her away not knowing
what to do next. After leaving I realized I should have tried starting from
the real cockpit and checked the pressure on the rear gauge.
I would appreciate some advice on how to diagnose this problem without
damaging the engine. The previous flight was about three weeks ago and I did
not notice any problem at that time. The only time I have ever noticed any
lack of indicated pressure is immediately after changing the oil when it
takes 10 seconds or so for the pressure to come up. Any suggestions on what
to do next?
Steve Johnson
Yak 52, N9900X
0B5, MA
413 522-1130 Cell
Message 2
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| Subject: | Re: no oil indicated oil pressure |
Steve what is your pre-heat procedure? I also notice at times very low oil pressure
if starting without preheating the oil, I think the pump cavitate's trying
to push the thick oil and I've been told that it can damage the oil cooler.
I use electric heating pads and red dragon to pre-heat. Try warming it up and
see if that solves your problem.
Bill Wade
----- Original Message ----
From: Steven A Johnson <sajdds@COMCAST.NET>
Sent: Friday, November 23, 2007 9:23:41 AM
Subject: Yak-List: no oil indicated oil pressure
I went to go flying last Sunday in my Yak 52 and immediately after starting noticed
I had no indicated oil pressure. I waited a couple of minutes to see if it
would come up but it never did so I shut her down. Preflight oil check had indicated
10 liters of oil. Next I looked carefully at the oil pressure gauge as
I turned the power on and off and noticed the needle did move as the instrument
came alive. I tried restarting and noticed the oil pressure was actually into
the small yellow range on the dial but it normally is way at the top of the
green. I shut her down again and put her away not knowing what to do next. After
leaving I realized I should have tried starting from the real cockpit and
checked the pressure on the rear gauge.
I would appreciate some advice on how to diagnose this problem without damaging
the engine. The previous flight was about three weeks ago and I did not notice
any problem at that time. The only time I have ever noticed any lack of indicated
pressure is immediately after changing the oil when it takes 10 seconds
or so for the pressure to come up. Any suggestions on what to do next?
Steve Johnson
Yak 52, N9900X
0B5, MA
413 522-1130 Cell
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