Today's Message Index:
----------------------
1. 08:12 AM - Oil leak 912ULS (Peter Thomson)
2. 09:28 AM - Re: Oil leak 912ULS (Richard Girard)
3. 09:37 AM - Re: Oil leak 912ULS (david park)
4. 09:50 AM - Re: Oil leak 912ULS (=?iso-8859-1?Q?J=F3hann_J=F3hannsson?=)
5. 10:17 AM - Re: Oil leak 912ULS (Pete Christensen)
6. 11:59 AM - Re: Oil leak 912ULS (vic)
7. 12:42 PM - Re: Oil leak 912ULS (David Weaver)
Message 1
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Hi Listers
I have a very slight oil leak somewhere near the lower front of the engine.
Not enough to show in oil usage - at 850hrs still does not use oil between
50hr changes.
But enough to run oil underneath the engine and also be picked up in the
prop stream and lay a fine film over the top RHS of the engine (and fuel
and ignition components which live there) and inside the RHS of the
cowling.
It does not appear to be from the oil pressure sensor fitting or the oil
pressure spring unit, both of which I have changed prior to the leak. Nor
from the flange fittings of the oil pump housing. Nor the hardened gasket
of the fuel pump.
Could it be the crankcase join?
Could oil move forward along the bottom of the crankcase in flight - air
movement would indicate otherwise?
All comments most welcome!
Peter
CH701/912ULS
Message 2
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| Subject: | Re: Oil leak 912ULS |
Peter, Probably the easiest way to find your leak is with a phosphorescent
die and a black light.
http://www.tracerproducts.com/
is there anything that Amazon doesn't carry?
http://www.amazon.com/Tracer-Products-TP34000601-Fluorescent-Detection/dp/B000JFHNTM
Rick Girard
On Tue, Feb 19, 2013 at 10:12 AM, Peter Thomson <peterlthomson@gmail.com>wrote:
> Hi Listers
>
> I have a very slight oil leak somewhere near the lower front of the engine.
>
> Not enough to show in oil usage - at 850hrs still does not use oil between
> 50hr changes.
>
> But enough to run oil underneath the engine and also be picked up in the
> prop stream and lay a fine film over the top RHS of the engine (and fuel
> and ignition components which live there) and inside the RHS of the
> cowling.
>
> It does not appear to be from the oil pressure sensor fitting or the oil
> pressure spring unit, both of which I have changed prior to the leak. Nor
> from the flange fittings of the oil pump housing. Nor the hardened gasket
> of the fuel pump.
>
> Could it be the crankcase join?
>
> Could oil move forward along the bottom of the crankcase in flight - air
> movement would indicate otherwise?
>
> All comments most welcome!
>
> Peter
> CH701/912ULS
>
> *
>
> *
>
>
--
Zulu Delta
Mk IIIC
Thanks, Homer GBYM
It isn't necessary to have relatives in Kansas City in order to be unhappy.
- Groucho Marx
Message 3
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| Subject: | Re: Oil leak 912ULS |
I had a similar leak during test flying, found it was the oil pressure sende
r not screwed in tight enough?
Dave
Sent from my iPad
On 19 Feb 2013, at 16:20, "Peter Thomson" <peterlthomson@gmail.com> wrote:
> Hi Listers
>
> I have a very slight oil leak somewhere near the lower front of the engine
.
>
> Not enough to show in oil usage - at 850hrs still does not use oil between
50hr changes.
>
> But enough to run oil underneath the engine and also be picked up in the p
rop stream and lay a fine film over the top RHS of the engine (and fuel and i
gnition components which live there) and inside the RHS of the cowling.
>
> It does not appear to be from the oil pressure sensor fitting or the oil p
ressure spring unit, both of which I have changed prior to the leak. Nor fro
m the flange fittings of the oil pump housing. Nor the hardened gasket of th
e fuel pump.
>
> Could it be the crankcase join?
>
> Could oil move forward along the bottom of the crankcase in flight - air m
ovement would indicate otherwise?
>
> All comments most welcome!
>
> Peter
> CH701/912ULS
>
>
>
==========================
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=========
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=========
==========================
=========
>
Message 4
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| Subject: | Re: Oil leak 912ULS |
Hello Peter.
I had a small oil leak on one of the hoses for the oil cooler. The
cooler is underneath the radiator.
Just a loose clamp. I would check that area and eliminate the hoses?
Hope this will help.
Johann G.
Iceland.
CH701 Rotax 912UL.
On 19.2.2013, at 16:12, Peter Thomson wrote:
> Hi Listers
>
> I have a very slight oil leak somewhere near the lower front of the
engine.
>
> Not enough to show in oil usage - at 850hrs still does not use oil
between 50hr changes.
>
> But enough to run oil underneath the engine and also be picked up in
the prop stream and lay a fine film over the top RHS of the engine (and
fuel and ignition components which live there) and inside the RHS of
the cowling.
>
> It does not appear to be from the oil pressure sensor fitting or the
oil pressure spring unit, both of which I have changed prior to the
leak. Nor from the flange fittings of the oil pump housing. Nor the
hardened gasket of the fuel pump.
>
> Could it be the crankcase join?
>
> Could oil move forward along the bottom of the crankcase in flight -
air movement would indicate otherwise?
>
> All comments most welcome!
>
> Peter
> CH701/912ULS
>
>
>
>
Message 5
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| Subject: | Re: Oil leak 912ULS |
Peter,
I have an old 912 (1991). I found that the oil streaming out under my Kitfo
x adds about 5 mph to my airspeed. Like squeezing a watermelon seed between
your fingers. ;-)
Pete
Leander, Tx
On Feb 19, 2013, at 10:12 AM, Peter Thomson <peterlthomson@gmail.com> wrote:
> Hi Listers
>
> I have a very slight oil leak somewhere near the lower front of the engine
.
>
> Not enough to show in oil usage - at 850hrs still does not use oil between
50hr changes.
>
> But enough to run oil underneath the engine and also be picked up in the p
rop stream and lay a fine film over the top RHS of the engine (and fuel and i
gnition components which live there) and inside the RHS of the cowling.
>
> It does not appear to be from the oil pressure sensor fitting or the oil p
ressure spring unit, both of which I have changed prior to the leak. Nor fro
m the flange fittings of the oil pump housing. Nor the hardened gasket of th
e fuel pump.
>
> Could it be the crankcase join?
>
> Could oil move forward along the bottom of the crankcase in flight - air m
ovement would indicate otherwise?
>
> All comments most welcome!
>
> Peter
> CH701/912ULS
>
>
>
==========================
=========
==========================
=========
==========================
=========
==========================
=========
>
Message 6
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| Subject: | Re: Oil leak 912ULS |
Peter
Had the same prob. Had a film on certain things.
Changed my oil tank/cooler large oring.
No film
Message 7
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| Subject: | Re: Oil leak 912ULS |
I routinely inspect for 912 valve cover and push rod tube seepage by reachi
ng under the engine and touch those locations.- If I pull back oily finge
rs then I can assess as to the degree of seepage.- During the first 100 h
ours of operation, I did confirm two engine case seam leaks and one push ro
d tube thread leak at cylinder head intersection.- I avoided major engine
tear down by applying 3M Fire Barrier high temp silicone (structural grade
RTV).- The surfaces were cleaned initially with MEK before application o
f silicone.- I have since logged over 200 hours on the engine with no new
leaks in those locations. -I used the same silicone to mount the coolant
radiator.- For a low oil pressure leak,-I thought it just might work..
..I was right.-
Dave Weaver N912GR-
--- On Tue, 2/19/13, Richard Girard <aslsa.rng@gmail.com> wrote:
From: Richard Girard <aslsa.rng@gmail.com>
Subject: Re: RotaxEngines-List: Oil leak 912ULS
Peter, Probably the easiest way to find your leak is with a phosphorescent
die and a black light.-
http://www.tracerproducts.com/
is there anything that Amazon doesn't carry?
http://www.amazon.com/Tracer-Products-TP34000601-Fluorescent-Detection/dp/B
000JFHNTM
Rick Girard
On Tue, Feb 19, 2013 at 10:12 AM, Peter Thomson <peterlthomson@gmail.com> w
rote:
Hi Listers
I have a very slight oil leak somewhere near the lower front of the engine.
Not enough to show in oil usage - at 850hrs still does not use oil between
50hr changes.
But enough to run oil underneath the engine and also be picked up in the pr
op stream and lay a fine film over the top RHS of the engine (and fuel and
ignition components which live there) and inside- the RHS of the cowling.
It does not appear to be from the oil pressure sensor fitting or the oil pr
essure spring unit, both of which I have changed prior to the leak. Nor fro
m the flange fittings of the oil pump housing. Nor the hardened gasket of t
he fuel pump.
Could it be the crankcase join?
Could oil move forward along the bottom of the crankcase in flight - air mo
vement would indicate otherwise?
All comments most welcome!
Peter
CH701/912ULS
ist" target="_blank">http://www.matronics.com/Navigator?RotaxEngines-List
tp://forums.matronics.com
_blank">http://www.matronics.com/contribution
--
Zulu Delta
Mk IIIC
Thanks, Homer GBYM
It isn't necessary to have relatives in Kansas City in order to be unhappy.
- - Groucho Marx
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