Matronics Email Lists Forum Index Matronics Email Lists
Web Forum Interface to the Matronics Email Lists
 
 Get Email Distribution Too!Get Email Distribution Too!    FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

Newbie questions

 
Post new topic   Reply to topic    Matronics Email Lists Forum Index -> Yak-List
View previous topic :: View next topic  
Author Message
thebourgets(at)cia.com
Guest
PostPosted: Fri Oct 19, 2007 3:23 pm    Post subject: Newbie questions Reply with quote
Hi,, all

Newbie from Ottawa, I’m a member of RPA and I’ve flown in “the dragon” with Dan Fortin. He convinced me <grin> to sell my RV8 project and I’m now actively looking for a CJ.

I’ve found a couple I’m very interested and have a couple of questions. How concerned would you be about an engine with roughly 330 total time, that has had a hydro lock? It was professinonally repaired with a new piston, push rods etc.

Also,, a comp on cyl # 2 is 68. Should I be concerned by this low a reading? It is on the housai.

I’ll have lots more questions, and any advice, words of wisdom are appreciated.

Thanks

Mike
[quote][b]

- The Matronics Yak-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Yak-List
Back to top
dsavarese(at)elmore.rr.co
Guest
PostPosted: Fri Oct 19, 2007 4:35 pm    Post subject: Newbie questions Reply with quote
Read the attached which discusses compressions.
Dennis
[quote] ---

- The Matronics Yak-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Yak-List


Putting_Compression_in_context.doc
 Description:

Download
 Filename:  Putting_Compression_in_context.doc
 Filesize:  150.5 KB
 Downloaded:  405 Time(s)
Back to top
yaklist(at)citlink.net
Guest
PostPosted: Sat Oct 20, 2007 3:07 pm    Post subject: Newbie questions Reply with quote
Mike,

Welcome to the CJ driver group! I have owned and flown a CJ for 9
years and been a member of the RPA since it began. CJs are great
planes; you'll enjoy flying one.

My name is Keith Harbour and we have 5 CJs available for sale. My
contact information is :

402.563.4143 Home
402.564.7884 Office
402.910.5247 Mobile

Please call anytime for more information.

Looking forward to hearing from you,

Keith

Quoting Mike & Lyne Bourget <thebourgets(at)cia.com>:

Quote:
Hi,, all

Newbie from Ottawa, I'm a member of RPA and I've flown in "the dragon" with
Dan Fortin. He convinced me <grin> to sell my RV8 project and I'm now
actively looking for a CJ.

I've found a couple I'm very interested and have a couple of questions. How
concerned would you be about an engine with roughly 330 total time, that has
had a hydro lock? It was professinonally repaired with a new piston, push
rods etc.

Also,, a comp on cyl # 2 is 68. Should I be concerned by this low a
reading? It is on the housai.

I'll have lots more questions, and any advice, words of wisdom are
appreciated.

Thanks

Mike


- The Matronics Yak-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Yak-List
Back to top
flushjohnson(at)charter.n
Guest
PostPosted: Sat Oct 20, 2007 4:05 pm    Post subject: Newbie questions Reply with quote
I have placed my CJ6 on the market.
1970 , 285 HP, ss Exh, American airspeed,altimeter,manifold press,. I am second owner since certificated in 1992 It is pre moritorium. I purchased the plane in 1999, and have maintained since then. Exelent log books.Long range fuel cells installed 3 yrs. ago, 3 hrs with 45 min. reserve. The plane has been to Oshkosh and Sun in Fun numerous times. I need to chesk the logs to be correct:
350 soh, 4000 tt. Dan Fortin has seen and flown in Form, with this plane numerous times. Sell price$ 85,000 PH 817 366 3150. Fort Worth Tx. Contact off list if interested. Could send pictures.
IN answer to your questions, I dont see any thing wrong if the engine was completely inspected when repaired. The 68/80 is ok. Thanks Forrest "FLUSH" Johnson.
[quote] ---

- The Matronics Yak-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Yak-List
Back to top
thebourgets(at)cia.com
Guest
PostPosted: Sun Oct 21, 2007 3:37 pm    Post subject: Newbie questions Reply with quote
Thanks Dennis,,, good read


From: owner-yak-list-server(at)matronics.com [mailto:owner-yak-list-server(at)matronics.com] On Behalf Of A. Dennis Savarese
Sent: October 19, 2007 8:35 PM
To: yak-list(at)matronics.com
Subject: Re: Newbie questions


Read the attached which discusses compressions.

Dennis
[quote]
----- Original Message -----

From: Mike & Lyne Bourget (thebourgets(at)cia.com)

To: yak-list(at)matronics.com (yak-list(at)matronics.com)

Sent: Friday, October 19, 2007 6:22 PM

Subject: Newbie questions



Hi,, all

Newbie from Ottawa, I’m a member of RPA and I’ve flown in “the dragon” with Dan Fortin. He convinced me <grin> to sell my RV8 project and I’m now actively looking for a CJ.

I’ve found a couple I’m very interested and have a couple of questions. How concerned would you be about an engine with roughly 330 total time, that has had a hydro lock? It was professinonally repaired with a new piston, push rods etc.

Also,, a comp on cyl # 2 is 68. Should I be concerned by this low a reading? It is on the housai.

I’ll have lots more questions, and any advice, words of wisdom are appreciated.

Thanks

Mike
Quote:
href="http://www.matronics.com/Navigator?Yak-List">http://www.matronics.com/Navigator?Yak-Listhref="http://forums.matronics.com">http://forums.matronics.com
[b]

- The Matronics Yak-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Yak-List
Back to top
aerostar(at)aerostar.ro
Guest
PostPosted: Sun Oct 21, 2007 10:04 pm    Post subject: Newbie questions Reply with quote
--

- The Matronics Yak-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Yak-List
Back to top
mark.bitterlich(at)navy.m
Guest
PostPosted: Mon Oct 22, 2007 2:54 pm    Post subject: Newbie questions Reply with quote
Many may disagree with what I am about to say. So with that in mind,
let me just add that this is just my personal opinion, and I am NOT a
professional and I have ZERO experience with Housai engines. NADA ZIP
NOTHING

However, I have some experience with M-14 engines. On the M-14, it is
so common I would almost call it predictable that the #2 cylinder always
seems to be the first one that gives the owner some problems. It was
with mine, and it has been on 4 other M-14's that I have dealt with on
my field. I have no idea why that is... Well, I have an IDEA, but it is
totally unproven. Why doesn't matter, it always seems to be the #2.
Once you see #2 acting up, with a few more hundred hours max, you will
typically start to see one of the other top jugs start losing
compression. The lower ones ALWAYS seem to stay right up there at very
high numbers, with 80/80 not being uncommon.

The question is, how important is that one low cylinder when the rest
are up around 80/75 or higher! Maybe not much. However, in my humble
opinion, it does mean that something is not quite right in there. In my
case, when the #2 when down to 80/67, I yanked the jug, and found one
cracked ring, and an exhaust valve not seating. I reground the valve,
did a little honing on the cylinder, replaced the rings and it has been
in the mid 70's ever since (300 hours have gone by since then). Now #9
is acting up. It very slowly has gone down year by year until it is now
about 80/69 or so. I strongly suspect that the exhaust valve in that
one is leaking as well. Is the engine running ok? Yes. Can I notice
any loss of power? No. Do I trust the engine flying it like that?
Certainly. However, next summer, I am going to yank it off and grind the
valve down and take a careful look at the rings. This is not really
that hard of a project. It can be done in one day. Of course, if you
have money, you can toss a brand new cylinder and rings on that bad bear
and be done with it.

Bottom line is that in my experience it is not all that uncommon to see
a "sort of" low #2 cylinder, or M-14's anyway.

On your engine, what matters really is what the OTHER cylinders read.
If they're all around 80/72 or so, and with is down to 80/69, I would
not be at ALL concerned, or even raise an eyebrow. However, if they're
all in the high 80/78 range or so, and just #2 is down around 80/68,
then my guess is that you probably have a little bit of carbon sticking
underneath #2's exhaust valve. You might stake it and see if you get
lucky, but at the very worst... You might have to yank that one jug. In
any case, I would not hesitate to fly it. Another thing to do is to
check the logs and see how fast this one cylinder dropped to that value.
Compare it to last years Conditional Inspection, and the one before
that, etc. If that one cylinder dropped from say 80/76 to 80/68 in 60
hours or so, and the rest are still way up there, I think you can bet
that something is not quite right in that puppy dog. Not getting ready
to spit fire and metal mind you, just not as perfect as I would prefer
on my airplane.

Mark Bitterlich


--

- The Matronics Yak-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Yak-List
Back to top
brian-1927(at)lloyd.com
Guest
PostPosted: Mon Oct 22, 2007 3:17 pm    Post subject: Newbie questions Reply with quote
On Oct 22, 2007, at 3:53 PM, Bitterlich, Mark G CIV Det Cherry Point,
MALS-14 64E wrote:

Quote:

Point, MALS-14 64E" <mark.bitterlich(at)navy.mil>

Many may disagree with what I am about to say. So with that in mind,
let me just add that this is just my personal opinion, and I am NOT a
professional and I have ZERO experience with Housai engines. NADA ZIP
NOTHING

Oh, we don't worry about that here. Wink

Quote:

However, I have some experience with M-14 engines. On the M-14, it is
so common I would almost call it predictable that the #2 cylinder
always
seems to be the first one that gives the owner some problems. It was
with mine, and it has been on 4 other M-14's that I have dealt with on
my field. I have no idea why that is... Well, I have an IDEA,

I bet it is the hottest (CHT) cylinder.

Quote:
but it is
totally unproven. Why doesn't matter, it always seems to be the #2.
Once you see #2 acting up, with a few more hundred hours max, you will
typically start to see one of the other top jugs start losing
compression. The lower ones ALWAYS seem to stay right up there at
very
high numbers, with 80/80 not being uncommon.

That is because the rings sit in oil which always forms a good seal
even if the rings have blowby.

Quote:
The question is, how important is that one low cylinder when the rest
are up around 80/75 or higher! Maybe not much. However, in my humble
opinion, it does mean that something is not quite right in there.
In my
case, when the #2 when down to 80/67, I yanked the jug, and found one
cracked ring, and an exhaust valve not seating. I reground the valve,
did a little honing on the cylinder, replaced the rings and it has
been
in the mid 70's ever since (300 hours have gone by since then).
Now #9
is acting up. It very slowly has gone down year by year until it
is now
about 80/69 or so. I strongly suspect that the exhaust valve in that
one is leaking as well. Is the engine running ok? Yes. Can I notice
any loss of power? No. Do I trust the engine flying it like that?
Certainly.

OTOH, a leaking exhaust valve will burn the valve and seat. If it is
a leaky exhaust valve you want to fix it sooner rather than later.

Quote:
However, next summer, I am going to yank it off and grind the
valve down and take a careful look at the rings. This is not really
that hard of a project. It can be done in one day. Of course, if you
have money, you can toss a brand new cylinder and rings on that bad
bear
and be done with it.

Bottom line is that in my experience it is not all that uncommon to
see
a "sort of" low #2 cylinder, or M-14's anyway.

On your engine, what matters really is what the OTHER cylinders read.
If they're all around 80/72 or so, and with is down to 80/69, I would
not be at ALL concerned, or even raise an eyebrow. However, if
they're
all in the high 80/78 range or so, and just #2 is down around 80/68,
then my guess is that you probably have a little bit of carbon
sticking
underneath #2's exhaust valve. You might stake it and see if you get
lucky, but at the very worst... You might have to yank that one
jug. In
any case, I would not hesitate to fly it. Another thing to do is to
check the logs and see how fast this one cylinder dropped to that
value.
Compare it to last years Conditional Inspection, and the one before
that, etc. If that one cylinder dropped from say 80/76 to 80/68 in 60
hours or so, and the rest are still way up there, I think you can bet
that something is not quite right in that puppy dog. Not getting
ready
to spit fire and metal mind you, just not as perfect as I would prefer
on my airplane.

BTW, don't forget that the ring gaps can line up and cause the
compression to suddenly drop. Fly it for another 5 hours and then
check again. If it comes back up, OK.

Also, when checking compression you have to listen at the air intake
and at the exhaust. If a valve is leaking you will hear it. Don't
leave a leaking valve. It is bad juju. Stake the valve to try to get
it to seal. If it doesn't, fix it now.

--
Brian Lloyd 3191 Western Drive
brian HYPHEN 1927 AT lloyd DOT com Cameron Park, CA 95682
+1.916.367.2131 (voice) +1.270.912.0788 (fax)

I fly because it releases my mind from the tyranny of petty things . . .
— Antoine de Saint-Exupéry

PGP key ID: 12095C52A32A1B6C
PGP key fingerprint: 3B1D BA11 4913 3254 B6E0 CC09 1209 5C52 A32A 1B6C

- The Matronics Yak-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Yak-List
Back to top
Display posts from previous:   
Post new topic   Reply to topic    Matronics Email Lists Forum Index -> Yak-List All times are GMT - 8 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum


Powered by phpBB © 2001, 2005 phpBB Group