Today's Message Index:
----------------------
1. 05:51 AM - Re: Re: oil Usage (Lynn Matteson)
2. 08:34 AM - Compression (BobbyPaulk@COMCAST.NET)
3. 09:24 AM - Re: Compression (Lynn Matteson)
4. 12:54 PM - Re: Compression (T. Graziano)
5. 01:25 PM - Re: Compression (M&H Moreau)
Message 1
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| Subject: | Re: RE: oil Usage |
I finally went to the year-around exclusive use of 100W, after using
15/50W for a couple of winters. Now in the winter I heat my engine
with a 200 watt heater, so the use of the multi-grade is not
required....unless I find myself staying overnight in a hangar-less
area.
I'm surprised that you can rotate the carb that much with the
distributors in the way. I think I've finally got my EGT's where they
are happy...less than 100F apart, and the highest about 1370-1390F at
cruise (95-100 airspeed).
I just changed my oil, and this time I'm going to keep real good
records about when and how much I add between changes. I've written
it down before, but it happens so seldom that I lose the piece of
paper it is written on between oil additions...my bad.
Lynn Matteson
Kitfox IV Speedster, taildragger
Jabiru 2200, #2062, 695.8 hrs
Sensenich 62"x46" Wood prop
Electroair direct-fire ignition system
Status: flying
On Jul 6, 2009, at 8:56 PM, zeprep251@aol.com wrote:
> Lynn,
> Testing indicates no vacuum at the vent exit.Going to try 100W in
> place of 15/50W at next oil change.The first couple hours after the
> oil change the level stays up on the stick.But after that it slowly
> starts to evaporate.I did not put the first 188 hours on this
> engine,so it may have had an event that could cause this issue.I,ll
> quit bitching now and keep adding oil as it needs it.It,s a sweet
> running engine even with the carb twisted 20 degrees to even out
> the egt's.
> Thanks G.Aman
>
>
> -----Original Message-----
> From: Lynn Matteson <lynnmatt@jps.net>
> To: jabiruengine-list@matronics.com
> Sent: Mon, Jul 6, 2009 9:13 am
> Subject: Re: JabiruEngine-List: RE: oil Usage
>
> <lynnmatt@jps.net>
>
> It may be the difference between your Kolb pusher, and my enclosed-
> engine tractor Kitfox, but your plumbing sounds really convoluted!
> This oil collection business doesn't seem to me to have to be all
> that complicated, but of course in an engine-exposed environment
> things will be different.
> Keep us posted will you, Gary?
>
> Lynn Matteson
> Kitfox IV Speedster, taildragger
> Jabiru 2200, #2062, 693.9 hrs
> Sensenich 62"x46" Wood prop
> Electroair direct-fire ignition system
> Status: flying
> do not archive
>
>
> On Jul 5, 2009, at 4:22 PM, zeprep251@aol.com wrote:
>
> > Lynn,
> > Oil collection bottle is directly behind my seat on the floor of
> > the fuselage.The last of the vent exits thru the floor on the >
> bottom.It extends 1 inch below the bottom and is cut at 90 degrees
> > to the pipe.I could place a short piece of 1/2" copper tube, cut
> at > a 45 degree angle facing forward, in the tube which could
> slightly > pressurize the system.I have had a modified PCV valve in
> the line 2 > inches from the oil stick for some time now,hoping to
> put the > crankcase in a partial vacuum,letting air out but not
> back in.This > slowed the rate of oil loss but perhaps not for the
> reason it was > installed.It may be just giving the oil a place to
> collect or to > ubstruct its movement.
> > I can easily test the collector bottle for vacuum, for there > is
> a 1/4 inch line installed from beside my seat thru the lid to >
> near the bottom of the bottle to evacuate collected oil with a >
> vacuum pump. If that test shows vacuum,I will try the angle vent to
> > reverse it.The PCV valve will not let the crankcase be
> pressurized > but could eliminate vacuum in the vent system ahead
> of it.
> > I'm pretty sure that not all of the missing oil from the > engine
> ends up in the collector, but it does not leak externally at >
> all.If it burns it,it burns it,and I can live with that.I would >
> just like to keep the collector dry as possible.
> > Thanks for the input.I'll let you know what I find.
> > Gary Aman
> >
> >
> > -----Original Message-----
> > From: Lynn Matteson <lynnmatt@jps.net>
> > To: jabiruengine-list@matronics.com
> > Sent: Sun, Jul 5, 2009 1:33 pm
> > Subject: Re: JabiruEngine-List: RE: oil Usage
> >
> <lynnmatt@jps.net>
> >
> > Gary-
> >
> > I guess I'd have to see where the oil collection bottle is in >
> reference to the airflow to know if it seemed right for your >
> installation. However, someone with the same setup might chime in >
> and help you out. I just re-read your original post, and I'm not >
> sure if you're indicating a problem or not. If all the expelled oil
> > ends up in the bottle, that seems right to me, unless you think
> TOO > much oil is being expelled by the engine. Just keep in mind
> that if > the vent overboard is in a high airflow area, maybe a
> vacuum is > being formed and helping to draw oil out of the engine.
> >
> > Lynn Matteson
> > Kitfox IV Speedster, taildragger
> > Jabiru 2200, #2062, 693.9 hrs
> > Sensenich 62"x46" Wood prop
> > Electroair direct-fire ignition system
> > Status: flying
> >
> >
> > On Jul 5, 2009, at 6:59 AM, zeprep251@aol.com wrote:
> >
> > > Lynn
> > > It,s a pusher,the rear of the engine is covered by a molded > >
> fairing that smooths airflow into the cooling shrouds.I have only >
> > one picture on the computer to send but maybe it will show enough
> > > to explain the set-up
> > > G,Aman
> > >
> > >
> > > -----Original Message-----
> > > From: Lynn Matteson <lynnmatt@jps.net>
> > > To: jabiruengine-list@matronics.com
> > > Sent: Sat, Jul 4, 2009 10:11 am
> > > Subject: Re: JabiruEngine-List: RE: oil Usage
> > >
> <lynnmatt@jps.net>
> > >
> > > Thanks, Gary...it really helps figure out what may be going on
> > with > the engine if we would all post the serial number when we
> > request > help....kinda like going to the doctor. He/she always >
> needs to know > your age.
> > >
> > > I'm not familiar with the Kolb...is it a pusher or tractor set-
> > up? > Does your oil vent line run uphill right after the dipstick
> > tube > attachment, then down to the bottle? And is the Kolb an >
> exposed > engine?
> > >
> > > My Kitfox is an enclosed cowl, tractor, and only requires about
> > 10 > oz of oil addition between 25 hour oil changes.
> > >
> > > Lynn Matteson
> > > Kitfox IV Speedster, taildragger
> > > Jabiru 2200, #2062, 689.3 hrs
> > > Sensenich 62"x46" Wood prop
> > > Electroair direct-fire ignition system
> > > Status: flying
> > >
> > >
> > > On Jul 4, 2009, at 12:55 AM, zeprep251@aol.com wrote:
> > >
> > > > Lynn,
> > > > Believe it is #1295
> > > > G.Aman
> > > >
> > > >
> > > > -----Original Message-----
> > > > From: Lynn Matteson <lynnmatt@jps.net>
> > > > To: jabiruengine-list@matronics.com
> > > > Sent: Thu, Jul 2, 2009 3:27 pm
> > > > Subject: Re: JabiruEngine-List: RE: oil Usage
> > > >
> <lynnmatt@jps.net>
> > > >
> > > > What serial number?
> > > >
> > > > Lynn Matteson
> > > > Kitfox IV Speedster, taildragger
> > > > Jabiru 2200, #2062, 687.3 hrs
> > > > Sensenich 62"x46" Wood prop
> > > > Electroair direct-fire ignition system
> > > > Status: flying
> > > > do not archive
> > > >
> > > >
> > > > On Jul 2, 2009, at 9:37 AM, zeprep251@aol.com wrote:
> > > >
> > > > > I have 440hrs on the 2200a in a MK3-C Kolb My vent system >
> > enters > a > 1 pint catch bottle then vents overboard The
> airframe > > stays > clean > by the vent hose,so all the oil ends
> up in the > > bottle.This > > indicates to me that the vent system
> on this engine > > requires some > > rethinking by Jabiru.My IO-470
> continental used > > less oil in 25 > hrs > than the Jabiru does in
> 5hrs.This is a > great > little > engine,they > just need to tweak
> it in the vent > and intake > systems.
> > > > > Gary Aman Akron Oh
> >
> >
> >
> > www.matronics.com/contribution _->
> ===========================================================
>
>
> www.matronics.com/contribution _-
> ===========================================================
Message 2
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all,
i have just taken differential compression test on my 3300A with 84 hrs S.N. 1141.(
Conditional Inspection ) No. 2 and 6 had 75 & 77 the rest had low to mid
60's. i could rock the prop to seat the rings and get another 5 ~ 6 lbs. while
on #5 near the oil collector bottle i could feel air out the bottle vent so the
air is going thru the rings and pressurizing the crankcase. Test was on a cold
engine setting up for about 2 weeks.
my question is at 84 hrs could this many cylinders have rings not yet seated. last
year all were in the high 70's. the engine starts fine as always and i have
not noticed any power drop. the first 40 hrs or so the engine ran too lean and
it was difficult to control high EGT / CHT's.
any ideas??
Bobby
601 XL
Message 3
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Did you try removing the rocker covers and giving each rocker a few
love taps right over the valve? This will often settle a valve onto
its seat and give a few or several more pounds of compression. Going
by the recently published "Summary of significant engine changes",
you have a hydraulic lifter engine, right? If so, it sounds like the
"high leak lifter" engine. I don't know how this would affect the
tapping-on-the-valve procedure, so you might want to ask Pete if
that's ok to do.
Lynn Matteson
Kitfox IV Speedster, taildragger
Jabiru 2200, #2062, 695.8 hrs
Sensenich 62"x46" Wood prop
Electroair direct-fire ignition system
Status: flying
do not archive
On Jul 7, 2009, at 11:30 AM, BobbyPaulk@COMCAST.NET wrote:
> all,
>
> i have just taken differential compression test on my 3300A with 84
> hrs S.N. 1141.( Conditional Inspection ) No. 2 and 6 had 75 & 77
> the rest had low to mid 60's. i could rock the prop to seat the
> rings and get another 5 ~ 6 lbs. while on #5 near the oil collector
> bottle i could feel air out the bottle vent so the air is going
> thru the rings and pressurizing the crankcase. Test was on a cold
> engine setting up for about 2 weeks.
> my question is at 84 hrs could this many cylinders have rings not
> yet seated. last year all were in the high 70's. the engine starts
> fine as always and i have not noticed any power drop. the first 40
> hrs or so the engine ran too lean and it was difficult to control
> high EGT / CHT's.
>
> any ideas??
>
> Bobby
> 601 XL
> ============================================================ _-
> ============================================================ _-
> contribution_-
> ===========================================================
Message 4
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Bobby,
Have you tried "dynamic"compression testing (see compression testing
Page 18 of Jab Instruction & Maintenance Manual, Rev 3 dated 18 Jul
2008. (this is for the solid lifter 3300A - suspect the hydraulic lifter
is the same)
Para 5.7.8 "Compression Testing: Condition of compression can be done
by a compression gauge. Wide open throttle, engine warm. Turn over on
starter. Below 90 psi would indicate removal of head and possibly
cylinder>
At my last annual, almost a year ago, I read 160#, 160#, 160#, 165#, 165
and 170# on my Jab with 408 hrs. Not much, if any, change from the
years before.
Tony Graziano
ZodiacXL/Jab3300A - Ser 33A644; N493TG; 509 hrs.
----- Original Message -----
From: BobbyPaulk@COMCAST.NET
To: jabiruengine-list-digest@matronics.com
Sent: Tuesday, July 07, 2009 10:30 AM
Subject: JabiruEngine-List: Compression
all,
i have just taken differential compression test on my 3300A with 84
hrs S.N. 1141.( Conditional Inspection ) No. 2 and 6 had 75 & 77 the
rest had low to mid 60's. i could rock the prop to seat the rings and
get another 5 ~ 6 lbs. while on #5 near the oil collector bottle i could
feel air out the bottle vent so the air is going thru the rings and
pressurizing the crankcase. Test was on a cold engine setting up for
about 2 weeks.
my question is at 84 hrs could this many cylinders have rings not yet
seated. last year all were in the high 70's. the engine starts fine as
always and i have not noticed any power drop. the first 40 hrs or so the
engine ran too lean and it was difficult to control high EGT / CHT's.
any ideas??
Bobby
601 XL
Message 5
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I have a similar problem. Just worse..
After 140 hours my engine is leaking through the valves and the rings.
The differentail test gives : 40/80, 49/80, 34/80, 55/80
Strangely a compression test gives: 153, 156, 147, 159
At 90 hours I had the cylinders were honed and the rings changed!!
I don't know were to turn to obtain a rational explanation..
Michel, Q-2 (Ser# 22A1093)
----- Original Message -----
From: BobbyPaulk@comcast.net
To: jabiruengine-list-digest@matronics.com
Sent: Tuesday, July 07, 2009 11:30 AM
Subject: JabiruEngine-List: Compression
all,
i have just taken differential compression test on my 3300A with 84 hrs S.N.
1141.( Conditional Inspection ) No. 2 and 6 had 75 & 77 the rest had low to mid
60's. i could rock the prop to seat the rings and get another 5 ~ 6 lbs. while
on #5 near the oil collector bottle i could feel air out the bottle vent so
the air is going thru the rings and pressurizing the crankcase. Test was on
a cold engine setting up for about 2 weeks.
my question is at 84 hrs could this many cylinders have rings not yet seated.
last year all were in the high 70's. the engine starts fine as always and i have
not noticed any power drop. the first 40 hrs or so the engine ran too lean
and it was difficult to control high EGT / CHT's.
any ideas??
Bobby
601 XL
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