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stolpilot.wilde(at)gmail.
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 Posted: Tue May 24, 2011 12:01 pm Post subject: Low Oil Pressure |
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I changed oil to the AeroShell Sport Plus 4 and noticed that my oil
pressure has been dropping since the weather has warmed. My pressure is
now showing at the lower limit of 30 psi in cruise. The oil temp and
water temps are fine, just a low indication on the pressure gauge. Are
others noticing this? It appears to be a viscosity issue to me since my
recent oil and filter change showed no metal particles in the filter and
everything else appears normal.
My plane is a Zenith 701 with the 912S and 150 hours.
Dan Wilde
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ollie6a(at)embarqmail.com
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| Posted: Tue May 24, 2011 1:10 pm Post subject: Low Oil Pressure |
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Could be the sender if yours is mounted on the front of the engine. I
have changed mine about 4 times in 800+ hours.
On Tue, May 24, 2011 at 3:58 PM, Dan Wilde <stolpilot.wilde(at)gmail.com> wrote:
| Quote: |
<stolpilot.wilde(at)gmail.com>
I changed oil to the AeroShell Sport Plus 4 and noticed that my oil pressure
has been dropping since the weather has warmed. Â My pressure is now showing
at the lower limit of 30 psi in cruise. Â The oil temp and water temps are
fine, just a low indication on the pressure gauge. Â Are others noticing
this? Â It appears to be a viscosity issue to me since my recent oil and
filter change showed no metal particles in the filter and everything else
appears normal.
My plane is a Zenith 701 with the 912S and 150 hours.
Dan Wilde
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| Quote: | From Central Florida,
 Ollie
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Roger Lee
Joined: 10 Jan 2006
Posts: 1464
Location: Tucson, Az.
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| Posted: Tue May 24, 2011 2:19 pm Post subject: Re: Low Oil Pressure |
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I doubt it is the oil. It is usually the sender. Put a mechanical gauge in line and start the engine and compare it to the cockpit reading. This is the only way, anything else is just guessing.
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_________________
Roger Lee
Tucson, Az.
Rotax Instructor & Rotax IRC
Light Sport Repairman
Home 520-574-1080 TRY HOME FIRST
Cell 520-349-7056 |
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KeysFox
Joined: 05 Jan 2009
Posts: 137
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| Posted: Tue May 24, 2011 2:22 pm Post subject: Low Oil Pressure |
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I have changed oil three times now using AeroShell Light Sport 4 Stroke
oil in my early S/N 912 and have not noticed low oil pressures in flying
in the hot Florida Keys. Nor in the hot desert southwest.
However, At the last oil change with Shell 4 stroke, I changed out the oil
pressure spring, ball and retaining plug, as called for in the SB to
extend TBO. AND saw very high oil pressure on start-up immediately
thereafter (way up into the yellow) which caught my attention. Plus rapid
vibration of the needle in the gauge was present, worse at certain RPMs. I
had seen this needle vibration before when using a non-Rotax oil filter
and it had previously dissapeared when I installed a Rotax filter.
Not being sure if the vibration was caused by the new but maybe deffective
Rotax filter or the new spring, ball and plug, I called Lockwood and was
told to install a "Mushroom" type ball, which was engineered specifically
to control oil pressure gauge needle vibration. I installed the "mushroom"
style "ball" however it has a hole thru the middle which allows oil to
pass thru, at least I think thats how it works.
Suspecting that oil was bypassing the over pressure relief system thru the
"mushroom", I switched back to the original ball, spring and plug and oil
pressure was good, plus needle vibration dissapeared.
As an aside, a Shell Oil representative at the Sebring Light Sport Expo,
told me that the Shells Light Sport 4 Stroke oil is engineered with some
ashless disspersant characteristics to help handle lead if we use 100LL in
our 912s. Ashless dispersant is not mentioned on the container, because
someone might think it was OK to use in an aircooled Lycoming or
Continental. It is not. Heavy metal anti wear additives are added to the
Light Sport 4 Stroke oil to incease lubricity ijn our Rotax gear boxes.
The heavy metals will build up in Lycs and Cont. engine combustion
chambers, leading to detonation.
BJ
Kitfox IV
912 - 450 hours
| Quote: |
<stolpilot.wilde(at)gmail.com>
I changed oil to the AeroShell Sport Plus 4 and noticed that my oil
pressure has been dropping since the weather has warmed. My pressure is
now showing at the lower limit of 30 psi in cruise. The oil temp and
water temps are fine, just a low indication on the pressure gauge. Are
others noticing this? It appears to be a viscosity issue to me since my
recent oil and filter change showed no metal particles in the filter and
everything else appears normal.
My plane is a Zenith 701 with the 912S and 150 hours.
Dan Wilde
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_________________
B Jones
N154K
443-480-1023 |
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jlatimer1(at)cox.net
Guest
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| Posted: Tue May 24, 2011 2:48 pm Post subject: Low Oil Pressure |
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Dan Wilde wrote:
I changed oil to the AeroShell Sport Plus 4 and noticed that my oil pressure
has been dropping since the weather has warmed. My pressure is
now showing at the lower limit of 30 psi in cruise. The oil temp and
water temps are fine, just a low indication on the pressure gauge. Are
others noticing this? It appears to be a viscosity issue to me since my
recent oil and filter change showed no metal particles in the filter and
everything else appears normal.
Dan,
I also use Aeroshell Sport Plus 4. My oil pressures have remained constant
from winter to summer. I flew for 2.2 hours this weekend with part of the
time at 90+ degrees. Oil pressure ran close to 70 psi.
Jerry
601HDS
94 hours on 912uls
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Dick Maddux
Joined: 24 Jun 2008
Posts: 516
Location: Milton, Fl
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| Posted: Wed May 25, 2011 2:51 am Post subject: Low Oil Pressure |
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BJ,
I too had problems with big oil pressure fluctuations when I installed the new "mushroom" I went back to the old ball and problem solved.That's what I am using now.
Aeroshell Plus 4 seems to be running fine with good temps/pressures in my engine.
Dick Maddux
Milton,Fl
old 912 UL
[quote][b]
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stolpilot.wilde(at)gmail.
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| Posted: Fri May 27, 2011 3:07 pm Post subject: Low Oil Pressure |
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Thanks to all that replied to my low oil pressure issue. I have ordered
a new sender and will see if that makes a difference.
Dan Wilde
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ptag.dev(at)tiscali.co.uk
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| Posted: Fri May 27, 2011 10:44 pm Post subject: Low Oil Pressure |
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Hi! Dan
Sorry I've not been following the thread so may be duplicating the advice but whilst you are fitting the new pressure sender mount it on the firewall forward and run high pressure pipe to it from the front of the engine. I just did that along with the mushroom type pressure regulator and the pressure read out never varies but factual and steady.
Best regards
Bob Harrison Europa G-PTAG
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