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mr.sun
Joined: 30 Jan 2007
Posts: 85
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 Posted: Tue Sep 13, 2011 7:06 am Post subject: Overheating cylinder |
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On a recent crosscountry flight at 8k and 2350 rpm, my IO360 started a wild fluxuation on #2 cht. My Skyview showed rapid movement between 300 and 550 degrees then it went out of range and stayed that way until landing. While taxiing all temps were normal and #2 egt stayed normal throughout the flight. When I pulled the cowl nothing looked cooked and sensor wire looked normal. Compression seemed normal when I pulled the prop through eight or ten times. I will swap egt sensors 2&4 next flight. Any other suggestions?
Greg On Sep 12, 2011 5:33 AM, "Linn Walters" <pitts_pilot(at)bellsouth.net (pitts_pilot(at)bellsouth.net)> wrote:> --> RV-List message posted by: Linn Walters <pitts_pilot(at)bellsouth.net (pitts_pilot(at)bellsouth.net)>
>
| Quote: | Email Les Staples at SkyTek. Les Staples <les(at)skytecair.com (les(at)skytecair.com)>
He's more than willing to help. Tell him I sent ya.
Linn Walters
> On 9/11/2011 8:40 PM, Brian Huffaker wrote:
|
| Quote: | > --> RV-List message posted by: Brian Huffaker<bifft(at)xmission.com (bifft(at)xmission.com)>
> Got the exhaust system attached. It went together very easy, oneof the
>> simplest parts of this project so far. Everything just fit (once I filed
|
| Quote: | > the gaskets a little bit). Definatly recommend the Vetterman exaust if
> anybody is wondering.
>
> Looking ahead to later steps, I'm going to need a flywheel and starter
>> ring gear. Reading around, lycomings have either the 122 or 149 tooth
|
| Quote: | > gear, is there a way I can look at the starter I have and know which gear
> would fit? I can find lots of pages like this:
>>
|
| Quote: | > http://www.skytecair.com/RingGearTech.htm
>
> explaining how to tell from the gear which it is, but nothing going the
> other way. It is a O-360A1D, so probably 149, but how can I know? Or
>> should I just get one, then get a new starter to match? That page talks
|
| Quote: | >
> Which says it is for a 122 tooth gear. Anybody know how to tell?
>>
|
| Quote: | > Brian Huffaker, DSWL (bifft(at)xmission.com (bifft(at)xmission.com))
> RV-8A 80091 Hooking up engine.
> 1/4 Starduster II N23UT flying
="http://www.matronics.com/Navigator?RV-List">http://www.matronics.com/Navigator?RV-List
|
://forums.matronics.com">http://forums.matronics.com
min.
=
[quote][b]
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Greg RV-7 |
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rv10rob(at)gmail.com
Guest
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| Posted: Tue Sep 13, 2011 7:40 am Post subject: Overheating cylinder |
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Try re-crimping the connectors before swapping the sensors.
On Tue, Sep 13, 2011 at 8:02 AM, <mr.gsun(at)gmail.com (mr.gsun(at)gmail.com)> wrote:
| Quote: |
On a recent crosscountry flight at 8k and 2350 rpm, my IO360 started a wild fluxuation on #2 cht. My Skyview showed rapid movement between 300 and 550 degrees then it went out of range and stayed that way until landing. While taxiing all temps were normal and #2 egt stayed normal throughout the flight. When I pulled the cowl nothing looked cooked and sensor wire looked normal. Compression seemed normal when I pulled the prop through eight or ten times. I will swap egt sensors 2&4 next flight. Any other suggestions?
Greg On Sep 12, 2011 5:33 AM, "Linn Walters" <pitts_pilot(at)bellsouth.net (pitts_pilot(at)bellsouth.net)> wrote:> --> RV-List message posted by: Linn Walters <pitts_pilot(at)bellsouth.net (pitts_pilot(at)bellsouth.net)>
>
| Quote: | Email Les Staples at SkyTek. Les Staples <les(at)skytecair.com (les(at)skytecair.com)>
He's more than willing to help. Tell him I sent ya.
Linn Walters
>
|
| Quote: |
On 9/11/2011 8:40 PM, Brian Huffaker wrote:
> --> RV-List message posted by: Brian Huffaker<bifft(at)xmission.com (bifft(at)xmission.com)>
>
>>
|
| Quote: | > Got the exhaust system attached. It went together very easy, oneof the
> simplest parts of this project so far. Everything just fit (once I filed
> the gaskets a little bit). Definatly recommend the Vetterman exaust if
>> anybody is wondering.
|
| Quote: | >
> Looking ahead to later steps, I'm going to need a flywheel and starter
> ring gear. Reading around, lycomings have either the 122 or 149 tooth
> gear, is there a way I can look at the starter I have and know which gear
>> would fit? I can find lots of pages like this:
|
| Quote: | > should I just get one, then get a new starter to match? That page talks
> about the first 3 digits of the starter model number, which is Delco-Remy
>> 1109519. Searching by that I find:
|
| Quote: | >
> Brian Huffaker, DSWL (bifft(at)xmission.com (bifft(at)xmission.com))
> RV-8A 80091 Hooking up engine.
>> 1/4 Starduster II N23UT flying
|
://forums.matronics.com">http://forums.matronics.com
min.
=
| Quote: |
t="_blank">http://www.matronics.com/Navigator?RV-List
ttp://forums.matronics.com
_blank">http://www.matronics.com/contribution
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--
Rob Kochman
RV-10 Flying since March 2011
Woodinville, WA
http://kochman.net/N819K
[quote][b]
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mrobert569(at)hotmail.com
Guest
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| Posted: Tue Sep 13, 2011 9:54 am Post subject: Overheating cylinder |
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If everything there is OK try checking the injectors. Sometimes something will get into the fuel injectors that causes the spray pattern to go bad.
Mike Robertson
Date: Tue, 13 Sep 2011 08:37:34 -0700
Subject: Re: Re: Overheating cylinder
From: rv10rob(at)gmail.com
To: rv-list(at)matronics.com
Try re-crimping the connectors before swapping the sensors.
On Tue, Sep 13, 2011 at 8:02 AM, <mr.gsun(at)gmail.com (mr.gsun(at)gmail.com)> wrote:
| Quote: | On a recent crosscountry flight at 8k and 2350 rpm, my IO360 started a wild fluxuation on #2 cht. My Skyview showed rapid movement between 300 and 550 degrees then it went out of range and stayed that way until landing. While taxiing all temps were normal and #2 egt stayed normal throughout the flight. When I pulled the cowl nothing looked cooked and sensor wire looked normal. Compression seemed normal when I pulled the prop through eight or ten times. I will swap egt sensors 2&4 next flight. Any other suggestions?
Greg
On Sep 12, 2011 5:33 AM, "Linn Walters" <pitts_pilot(at)bellsouth.net (pitts_pilot(at)bellsouth.net)> wrote:
| Quote: | --> RV-List message posted by: Linn Walters <pitts_pilot(at)bellsouth.net (pitts_pilot(at)bellsouth.net)>
Email Les Staples at SkyTek. Les Staples <les(at)skytecair.com (les(at)skytecair.com)>
He's more than willing to help. Tell him I sent ya.
Linn Walters
On 9/11/2011 8:40 PM, Brian Huffaker wrote:
> --> RV-List message posted by: Brian Huffaker<bifft(at)xmission.com (bifft(at)xmission.com)>
> Got the exhaust system attached. It went together very easy, oneof the
> simplest parts of this project so far. Everything just fit (once I filed
> the gaskets a little bit). Definatly recommend the Vetterman exaust if
> anybody is wondering.
>
> Looking ahead to later steps, I'm going to need a flywheel and starter
> ring gear. Reading around, lycomings have either the 122 or 149 tooth
> gear, is there a way I can look at the starter I have and know which gear
> would fit? I can find lots of pages like this:
>
> http://www.skytecair.com/RingGearTech.htm
>
> explaining how to tell from the gear which it is, but nothing going the
> other way. It is a O-360A1D, so probably 149, but how can I know? Or
> should I just get one, then get a new starter to match? That page talks
> about the first 3 digits of the starter model number, which is Delco-Remy
> 1109519. Searching by that I find:
>
> http://www.texasairsalvage.com/main_view.php?editid1=20144
>
> Which says it is for a 122 tooth gear. Anybody know how to tell?
>
> Brian Huffaker, DSWL (bifft(at)xmission.com (bifft(at)xmission.com))
> RV-8A 80091 Hooking up engine.
> 1/4 Starduster II N23UT flying
="http://www.matronics.com/Navigator?RV-List">http://www.matronics.com/Navigator?RV-List
|
://forums.matronics.com">http://forums.matronics.com
min.
=
| Quote: |
t="_blank">http://www.matronics.com/Navigator?RV-List
ttp://forums.matronics.com
_blank">http://www.matronics.com/contribution
|
|
--
Rob Kochman
RV-10 Flying since March 2011
Woodinville, WA
http://kochman.net/N819K
[quote]
get=_blank>http://www.matronics.com/Navigator?RV-List
ttp://forums.matronics.com
=_blank>http://www.matronics.com/contribution
[b]
| | - The Matronics RV-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:
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mr.sun
Joined: 30 Jan 2007
Posts: 85
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| Posted: Tue Sep 13, 2011 10:22 am Post subject: Overheating cylinder |
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Good thought, thanks. I will soak them in some Hoppe's #9. Would a cylinder with a dirty injector really run that much hotter?
Greg On Sep 13, 2011 10:58 AM, "Mike Robertson" <mrobert569(at)hotmail.com (mrobert569(at)hotmail.com)> wrote:>
| Quote: | If everything there is OK try checking the injectors. Sometimes something will get into the fuel injectors that causes the spray pattern to go bad.
>
|
| Quote: |
Try re-crimping the connectors before swapping the sensors.
On Tue, Sep 13, 2011 at 8:02 AM, <mr.gsun(at)gmail.com (mr.gsun(at)gmail.com)> wrote:
>
|
| Quote: |
On a recent crosscountry flight at 8k and 2350 rpm, my IO360 started a wild fluxuation on #2 cht. My Skyview showed rapid movement between 300 and 550 degrees then it went out of range and stayed that way until landing. While taxiing all temps were normal and #2 egt stayed normal throughout the flight. When I pulled the cowl nothing looked cooked and sensor wire looked normal. Compression seemed normal when I pulled the prop through eight or ten times. I will swap egt sensors 2&4 next flight. Any other suggestions?
> Greg
|
| Quote: | > Email Les Staples at SkyTek. Les Staples <les(at)skytecair.com (les(at)skytecair.com)>
> He's more than willing to help. Tell him I sent ya.
> Linn Walters
>>
|
| Quote: | >
> On 9/11/2011 8:40 PM, Brian Huffaker wrote:
>> --> RV-List message posted by: Brian Huffaker<bifft(at)xmission.com (bifft(at)xmission.com)>
>>
>>>
|
| Quote: | >> Got the exhaust system attached. It went together very easy, oneof the
>> simplest parts of this project so far. Everything just fit (once I filed
>> the gaskets a little bit). Definatly recommend the Vetterman exaust if
>>> anybody is wondering.
|
| Quote: | >>
>> Looking ahead to later steps, I'm going to need a flywheel and starter
>> ring gear. Reading around, lycomings have either the 122 or 149 tooth
>>> gear, is there a way I can look at the starter I have and know which gear
|
| Quote: | >> explaining how to tell from the gear which it is, but nothing going the
>> other way. It is a O-360A1D, so probably 149, but how can I know? Or
>> should I just get one, then get a new starter to match? That page talks
>>> about the first 3 digits of the starter model number, which is Delco-Remy
|
| Quote: | >> Which says it is for a 122 tooth gear. Anybody know how to tell?
>>
>> Brian Huffaker, DSWL (bifft(at)xmission.com (bifft(at)xmission.com))
>> RV-8A 80091 Hooking up engine.
>>> 1/4 Starduster II N23UT flying
|
[quote][b]
| | - The Matronics RV-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?RV-List |
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_________________
Greg RV-7 |
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dmaib@me.com
Joined: 25 Apr 2006
Posts: 454
Location: New Smyrna Beach, Florida
|
| Posted: Tue Sep 13, 2011 12:49 pm Post subject: Re: Overheating cylinder |
|
|
[quote="mr.sun"]Good thought,� thanks.�� I will soak them in some Hoppe's #9.��� Would a cylinder with a dirty injector really run that much hotter?���
Greg On Sep 13, 2011 10:58 AM, "Mike Robertson" <mrobert569> wrote:>
| Quote: | If everything there is OK try checking the injectors. Sometimes something will get into the fuel injectors that causes the spray pattern to go bad.
>
|
| Quote: |
Try re-crimping the connectors before swapping the sensors.
On Tue, Sep 13, 2011 at 8:02 AM, <mr> wrote:
>
|
| Quote: |
On a recent crosscountry flight at 8k and 2350 rpm, my IO360 started a wild fluxuation on #2 cht. My Skyview showed rapid movement between 300 and 550 degrees then it went out of range and stayed that way until landing. While taxiing all temps were normal and #2 egt stayed normal throughout the flight. When I pulled the cowl nothing looked cooked and sensor wire looked normal. Compression seemed normal when I pulled the prop through eight or ten times. I will swap egt sensors 2&4 next flight. Any other suggestions?
> Greg
|
| Quote: | On Sep 12, 2011 5:33 AM, "Linn Walters" <pitts_pilot> wrote:
> --> RV-List message posted by: Linn Walters <pitts_pilot>
>>
|
| Quote: | > Email Les Staples at SkyTek. Les Staples <les>
> He's more than willing to help. Tell him I sent ya.
> Linn Walters
>>
|
| Quote: | >
> On 9/11/2011 8:40 PM, Brian Huffaker wrote:
>> --> RV-List message posted by: Brian Huffaker<bifft>
>>
>>>
|
| Quote: | >> Got the exhaust system attached. It went together very easy, oneof the
>> simplest parts of this project so far. Everything just fit (once I filed
>> the gaskets a little bit). Definatly recommend the Vetterman exaust if
>>> anybody is wondering.
|
| Quote: | >>
>> Looking ahead to later steps, I'm going to need a flywheel and starter
>> ring gear. Reading around, lycomings have either the 122 or 149 tooth
>>> gear, is there a way I can look at the starter I have and know which gear
|
| Quote: | >> explaining how to tell from the gear which it is, but nothing going the
>> other way. It is a O-360A1D, so probably 149, but how can I know? Or
>> should I just get one, then get a new starter to match? That page talks
>>> about the first 3 digits of the starter model number, which is Delco-Remy
|
| Quote: | >> Which says it is for a 122 tooth gear. Anybody know how to tell?
>>
>> Brian Huffaker, DSWL (bifft(at)xmission.com (bifft(at)xmission.com))
>> RV-8A 80091 Hooking up engine.
>>> 1/4 Starduster II N23UT flying
|
| | - The Matronics RV-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?RV-List |
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_________________
David Maib
RV-10 #40559
New Smyrna Beach, FL |
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Kellym
Joined: 10 Jan 2006
Posts: 1705
Location: Sun Lakes AZ
|
| Posted: Tue Sep 13, 2011 2:09 pm Post subject: Overheating cylinder |
|
|
You won't have fluctuating values with a clogged injector. Only bad
probe wiring or a failing exhaust valve will cause rapid fluctation. In
the later case it will be a saw tooth pattern of maybe 50 degrees, and
your problem is far more likely to be a poor connection to the probe.
On 9/13/2011 12:19 PM, mr.gsun(at)gmail.com wrote:
| Quote: |
Good thought, thanks. I will soak them in some Hoppe's #9. Would
a cylinder with a dirty injector really run that much hotter?
Greg
On Sep 13, 2011 10:58 AM, "Mike Robertson" <mrobert569(at)hotmail.com
<mailto:mrobert569(at)hotmail.com>> wrote:
>
> If everything there is OK try checking the injectors. Sometimes
something will get into the fuel injectors that causes the spray
pattern to go bad.
>
> Mike Robertson
>
>
>
>
>
> Date: Tue, 13 Sep 2011 08:37:34 -0700
> Subject: Re: Re: Overheating cylinder
> From: rv10rob(at)gmail.com <mailto:rv10rob(at)gmail.com>
> To: rv-list(at)matronics.com <mailto:rv-list(at)matronics.com>
>
> Try re-crimping the connectors before swapping the sensors.
>
>
> On Tue, Sep 13, 2011 at 8:02 AM, <mr.gsun(at)gmail.com
<mailto:mr.gsun(at)gmail.com>> wrote:
>
>
> On a recent crosscountry flight at 8k and 2350 rpm, my IO360 started
a wild fluxuation on #2 cht. My Skyview showed rapid movement between
300 and 550 degrees then it went out of range and stayed that way
until landing. While taxiing all temps were normal and #2 egt stayed
normal throughout the flight. When I pulled the cowl nothing looked
cooked and sensor wire looked normal. Compression seemed normal when I
pulled the prop through eight or ten times. I will swap egt sensors
2&4 next flight. Any other suggestions?
> Greg
> On Sep 12, 2011 5:33 AM, "Linn Walters" <pitts_pilot(at)bellsouth.net
<mailto:pitts_pilot(at)bellsouth.net>> wrote:
>>
<pitts_pilot(at)bellsouth.net <mailto:pitts_pilot(at)bellsouth.net>>
>>
>> Email Les Staples at SkyTek. Les Staples <les(at)skytecair.com
<mailto:les(at)skytecair.com>>
>> He's more than willing to help. Tell him I sent ya.
>> Linn Walters
>>
>>
>> On 9/11/2011 8:40 PM, Brian Huffaker wrote:
>>>
<mailto:bifft(at)xmission.com>>
>>>
>>>
>>> Got the exhaust system attached. It went together very easy, oneof the
>>> simplest parts of this project so far. Everything just fit (once I
filed
>>> the gaskets a little bit). Definatly recommend the Vetterman exaust if
>>> anybody is wondering.
>>>
>>> Looking ahead to later steps, I'm going to need a flywheel and starter
>>> ring gear. Reading around, lycomings have either the 122 or 149 tooth
>>> gear, is there a way I can look at the starter I have and know
which gear
>>> would fit? I can find lots of pages like this:
>>>
>>> http://www.skytecair.com/RingGearTech.htm
>>>
>>> explaining how to tell from the gear which it is, but nothing
going the
>>> other way. It is a O-360A1D, so probably 149, but how can I know? Or
>>> should I just get one, then get a new starter to match? That page
talks
>>> about the first 3 digits of the starter model number, which is
Delco-Remy
>>> 1109519. Searching by that I find:
>>>
>>> http://www.texasairsalvage.com/main_view.php?editid1 144
>>>
>>> Which says it is for a 122 tooth gear. Anybody know how to tell?
>>>
>>> Brian Huffaker, DSWL (bifft(at)xmission.com <mailto:bifft(at)xmission.com>)
>>> RV-8A 80091 Hooking up engine.
>>> 1/4 Starduster II N23UT flying
>>>
>>>
>
="http://www.matronics.com/Navigator?RV-List">http://www.matronics.com/Navigator?RV-List
> ://forums.matronics.com
<http://forums.matronics.com>">http://forums.matronics.com
> min.
> =
>>
>>
>>
>
>
> t="_blank">http://www.matronics.com/Navigator?RV-List
> ttp://forums.matronics.com <http://forums.matronics.com>
> _blank">http://www.matronics.com/contribution
>
>
>
> --
>
> Rob Kochman
> RV-10 Flying since March 2011
> Woodinville, WA
> http://kochman.net/N819K
>
>
>
>
*
*
|
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Kelly McMullen
A&P/IA, EAA Tech Counselor # 5286
KCHD |
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mr.sun
Joined: 30 Jan 2007
Posts: 85
|
| Posted: Tue Sep 13, 2011 2:37 pm Post subject: Overheating cylinder |
|
|
Thanks. Interesting that it cools down and becomes normal moments after landing. But not on a long descent. Airflow thru cowl affecting poor crimp connection. Will recrimp wires and clean injectors this weelend.
Greg On Sep 13, 2011 3:15 PM, "Kelly McMullen" <kellym(at)aviating.com (kellym(at)aviating.com)> wrote:> --> RV-List message posted by: Kelly McMullen <kellym(at)aviating.com (kellym(at)aviating.com)>
>
| Quote: | You won't have fluctuating values with a clogged injector. Only bad
probe wiring or a failing exhaust valve will cause rapid fluctation. In
the later case it will be a saw tooth pattern of maybe 50 degrees, and
> your problem is far more likely to be a poor connection to the probe.
|
| Quote: |
On 9/13/2011 12:19 PM, mr.gsun(at)gmail.com (mr.gsun(at)gmail.com) wrote:
>
> Good thought, thanks. I will soak them in some Hoppe's #9. Would
>> a cylinder with a dirty injector really run that much hotter?
|
| Quote: | > >
> > If everything there is OK try checking the injectors. Sometimes
> something will get into the fuel injectors that causes the spray
>> pattern to go bad.
|
| Quote: | > > Try re-crimping the connectors before swapping the sensors.
> >
> >
> > On Tue, Sep 13, 2011 at 8:02 AM, <mr.gsun(at)gmail.com (mr.gsun(at)gmail.com)
>> <mailto:mr.gsun(at)gmail.com (mr.gsun(at)gmail.com)>> wrote:
|
| Quote: | > >
> >
> > On a recent crosscountry flight at 8k and 2350 rpm, my IO360 started
> a wild fluxuation on #2 cht. My Skyview showed rapid movement between
>> 300 and 550 degrees then it went out of range and stayed that way
|
| Quote: | > until landing. While taxiing all temps were normal and #2 egt stayed
> normal throughout the flight. When I pulled the cowl nothing looked
>> cooked and sensor wire looked normal. Compression seemed normal when I
|
| Quote: | > pulled the prop through eight or ten times. I will swap egt sensors
> 2&4 next flight. Any other suggestions?
>> > Greg
|
| Quote: | > >> Email Les Staples at SkyTek. Les Staples <les(at)skytecair.com (les(at)skytecair.com)
> <mailto:les(at)skytecair.com (les(at)skytecair.com)>>
>> >> He's more than willing to help. Tell him I sent ya.
|
| Quote: | > >> Linn Walters
> >>
> >>
> >> On 9/11/2011 8:40 PM, Brian Huffaker wrote:
> >>> --> RV-List message posted by: Brian Huffaker<bifft(at)xmission.com (bifft(at)xmission.com)
>> <mailto:bifft(at)xmission.com (bifft(at)xmission.com)>>
|
| Quote: | > >>>
> >>>
> >>> Got the exhaust system attached. It went together very easy, oneof the
>> >>> simplest parts of this project so far. Everything just fit (once I
|
| Quote: | > filed
> >>> the gaskets a little bit). Definatly recommend the Vetterman exaust if
> >>> anybody is wondering.
>> >>>
|
| Quote: | > >>> Looking ahead to later steps, I'm going to need a flywheel and starter
> >>> ring gear. Reading around, lycomings have either the 122 or 149 tooth
> >>> gear, is there a way I can look at the starter I have and know
>> which gear
|
| Quote: | > >>> explaining how to tell from the gear which it is, but nothing
> going the
> >>> other way. It is a O-360A1D, so probably 149, but how can I know? Or
>> >>> should I just get one, then get a new starter to match? That page
|
| Quote: | > talks
> >>> about the first 3 digits of the starter model number, which is
> Delco-Remy
>> >>> 1109519. Searching by that I find:
|
| Quote: | > >>> Which says it is for a 122 tooth gear. Anybody know how to tell?
> >>>
> >>> Brian Huffaker, DSWL (bifft(at)xmission.com (bifft(at)xmission.com) <mailto:bifft(at)xmission.com (bifft(at)xmission.com)>)
>> >>> RV-8A 80091 Hooking up engine.
|
| Quote: | > >
> >
> > --
> >
> > Rob Kochman
> > RV-10 Flying since March 2011
> > Woodinville, WA
> > http://kochman.net/N819K
>> >
|
| Quote: | > >
> >
> >
>re, and much much more:
TRONICS WEB FORUMS -
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rv10rob(at)gmail.com
Guest
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| Posted: Tue Sep 13, 2011 3:23 pm Post subject: Overheating cylinder |
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If it was an injector, wouldn't you be seeing high EGT, too?
On Tue, Sep 13, 2011 at 3:34 PM, <mr.gsun(at)gmail.com (mr.gsun(at)gmail.com)> wrote:
| Quote: |
Thanks. Interesting that it cools down and becomes normal moments after landing. But not on a long descent. Airflow thru cowl affecting poor crimp connection. Will recrimp wires and clean injectors this weelend.
Greg On Sep 13, 2011 3:15 PM, "Kelly McMullen" <kellym(at)aviating.com (kellym(at)aviating.com)> wrote:> --> RV-List message posted by: Kelly McMullen <kellym(at)aviating.com (kellym(at)aviating.com)>
>
| Quote: | You won't have fluctuating values with a clogged injector. Only bad
probe wiring or a failing exhaust valve will cause rapid fluctation. In
the later case it will be a saw tooth pattern of maybe 50 degrees, and
> your problem is far more likely to be a poor connection to the probe.
|
| Quote: |
On 9/13/2011 12:19 PM, mr.gsun(at)gmail.com (mr.gsun(at)gmail.com) wrote:
>
> Good thought, thanks. I will soak them in some Hoppe's #9. Would
>> a cylinder with a dirty injector really run that much hotter?
|
>> <mailto:mrobert569(at)hotmail.com (mrobert569(at)hotmail.com)>> wrote:
| Quote: | > >
> > If everything there is OK try checking the injectors. Sometimes
>> something will get into the fuel injectors that causes the spray
|
| Quote: | > pattern to go bad.
> >
> > Mike Robertson
> >
> >
> >
> >
>> >
|
| Quote: | > > Date: Tue, 13 Sep 2011 08:37:34 -0700
> > Subject: Re: Re: Overheating cylinder
|
| Quote: | > >
> > Try re-crimping the connectors before swapping the sensors.
> >
> >
> > On Tue, Sep 13, 2011 at 8:02 AM, <mr.gsun(at)gmail.com (mr.gsun(at)gmail.com)
|
>> <mailto:mr.gsun(at)gmail.com (mr.gsun(at)gmail.com)>> wrote:
| Quote: | > >
> >
> > On a recent crosscountry flight at 8k and 2350 rpm, my IO360 started
>> a wild fluxuation on #2 cht. My Skyview showed rapid movement between
|
| Quote: | > 300 and 550 degrees then it went out of range and stayed that way
> until landing. While taxiing all temps were normal and #2 egt stayed
>> normal throughout the flight. When I pulled the cowl nothing looked
|
| Quote: | > cooked and sensor wire looked normal. Compression seemed normal when I
> pulled the prop through eight or ten times. I will swap egt sensors
>> 2&4 next flight. Any other suggestions?
|
>> <mailto:pitts_pilot(at)bellsouth.net (pitts_pilot(at)bellsouth.net)>> wrote:
| Quote: | > >> --> RV-List message posted by: Linn Walters
|
| Quote: | > <mailto:les(at)skytecair.com (les(at)skytecair.com)>>
> >> He's more than willing to help. Tell him I sent ya.
> >> Linn Walters
> >>
> >>
> >> On 9/11/2011 8:40 PM, Brian Huffaker wrote:
>> >>> --> RV-List message posted by: Brian Huffaker<bifft(at)xmission.com (bifft(at)xmission.com)
|
| Quote: | > <mailto:bifft(at)xmission.com (bifft(at)xmission.com)>>
> >>>
> >>>
> >>> Got the exhaust system attached. It went together very easy, oneof the
> >>> simplest parts of this project so far. Everything just fit (once I
>> filed
|
| Quote: | > >>> the gaskets a little bit). Definatly recommend the Vetterman exaust if
> >>> anybody is wondering.
> >>>
> >>> Looking ahead to later steps, I'm going to need a flywheel and starter
>> >>> ring gear. Reading around, lycomings have either the 122 or 149 tooth
|
| Quote: | > >>> gear, is there a way I can look at the starter I have and know
> which gear
> >>> would fit? I can find lots of pages like this:
>> >>>
|
| Quote: | > >>> other way. It is a O-360A1D, so probably 149, but how can I know? Or
> >>> should I just get one, then get a new starter to match? That page
> talks
>> >>> about the first 3 digits of the starter model number, which is
|
| Quote: | > >>> Which says it is for a 122 tooth gear. Anybody know how to tell?
> >>>
|
| Quote: | >re, and much much more:
TRONICS WEB FORUMS -
|
=
nics.com/contribution">http://www.matronics.com/contribution
=============
| Quote: |
t="_blank">http://www.matronics.com/Navigator?RV-List
ttp://forums.matronics.com
_blank">http://www.matronics.com/contribution
|
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--
Rob Kochman
RV-10 Flying since March 2011
Woodinville, WA
http://kochman.net/N819K
[quote][b]
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Paul Valovich
Joined: 11 Jan 2006
Posts: 75
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| Posted: Wed Sep 14, 2011 5:42 am Post subject: Overheating cylinder |
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I had the same thing happen to me on 2 cylinders on 2 separate occasions during early phase 1 (new Aerosport IO-360). First time it was an obvious wiring issue – bad crimp that would intermittently make proper contact. The second time was also a wiring issue – but took a lot longer to discover. At first glance everything appeared ok – but more careful inspection revealed a loose wire.
In my case the temp variations were so rapid and extreme that I concluded the problem had to be electrical – not actual overheating. Sure got my attention, though.
[quote][b]
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mrobert569(at)hotmail.com
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| Posted: Wed Sep 14, 2011 2:50 pm Post subject: Overheating cylinder |
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It is possible. It happened to me, and after many injector cleanings and hunting we found it to be a bad flow divider. Not likely, but a possibility. Electrical is more likely.
Mike Robertson
Date: Tue, 13 Sep 2011 11:19:27 -0700
Subject: RE: Re: Overheating cylinder
From: mr.gsun(at)gmail.com
To: rv-list(at)matronics.com
Good thought, thanks. I will soak them in some Hoppe's #9. Would a cylinder with a dirty injector really run that much hotter?
Greg
On Sep 13, 2011 10:58 AM, "Mike Robertson" <mrobert569(at)hotmail.com (mrobert569(at)hotmail.com)> wrote:
| Quote: |
If everything there is OK try checking the injectors. Sometimes something will get into the fuel injectors that causes the spray pattern to go bad.
Mike Robertson
Date: Tue, 13 Sep 2011 08:37:34 -0700
Subject: Re: Re: Overheating cylinder
From: rv10rob(at)gmail.com (rv10rob(at)gmail.com)
To: rv-list(at)matronics.com (rv-list(at)matronics.com)
Try re-crimping the connectors before swapping the sensors.
On Tue, Sep 13, 2011 at 8:02 AM, <mr.gsun(at)gmail.com (mr.gsun(at)gmail.com)> wrote:
On a recent crosscountry flight at 8k and 2350 rpm, my IO360 started a wild fluxuation on #2 cht. My Skyview showed rapid movement between 300 and 550 degrees then it went out of range and stayed that way until landing. While taxiing all temps were normal and #2 egt stayed normal throughout the flight. When I pulled the cowl nothing looked cooked and sensor wire looked normal. Compression seemed normal when I pulled the prop through eight or ten times. I will swap egt sensors 2&4 next flight. Any other suggestions?
Greg
On Sep 12, 2011 5:33 AM, "Linn Walters" <pitts_pilot(at)bellsouth.net (pitts_pilot(at)bellsouth.net)> wrote:
> --> RV-List message posted by: Linn Walters <pitts_pilot(at)bellsouth.net (pitts_pilot(at)bellsouth.net)>
>
> Email Les Staples at SkyTek. Les Staples <les(at)skytecair.com (les(at)skytecair.com)>
> He's more than willing to help. Tell him I sent ya.
> Linn Walters
>
>
> On 9/11/2011 8:40 PM, Brian Huffaker wrote:
>> --> RV-List message posted by: Brian Huffaker<bifft(at)xmission.com (bifft(at)xmission.com)>
>>
>>
>> Got the exhaust system attached. It went together very easy, oneof the
>> simplest parts of this project so far. Everything just fit (once I filed
>> the gaskets a little bit). Definatly recommend the Vetterman exaust if
>> anybody is wondering.
>>
>> Looking ahead to later steps, I'm going to need a flywheel and starter
>> ring gear. Reading around, lycomings have either the 122 or 149 tooth
>> gear, is there a way I can look at the starter I have and know which gear
>> would fit? I can find lots of pages like this:
>>
>> http://www.skytecair.com/RingGearTech.htm
>>
>> explaining how to tell from the gear which it is, but nothing going the
>> other way. It is a O-360A1D, so probably 149, but how can I know? Or
>> should I just get one, then get a new starter to match? That page talks
>> about the first 3 digits of the starter model number, which is Delco-Remy
>> 1109519. Searching by that I find:
>>
>> http://www.texasairsalvage.com/main_view.php?editid1=20144
>>
>> Which says it is for a 122 tooth gear. Anybody know how to tell?
>>
>> Brian Huffaker, DSWL (bifft(at)xmission.com (bifft(at)xmission.com))
>> RV-8A 80091 Hooking up engine.
>> 1/4 Starduster II N23UT flying
>>
>>
="http://www.matronics.com/Navigator?RV-List">http://www.matronics.com/Navigator?RV-List
://forums.matronics.com">http://forums.matronics.com
min.
=
>
>
>
t="_blank">http://www.matronics.com/Navigator?RV-List
ttp://forums.matronics.com
_blank">http://www.matronics.com/contribution
--
Rob Kochman
RV-10 Flying since March 2011
Woodinville, WA
http://kochman.net/N819K
|
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get=_blank>http://www.matronics.com/Navigator?RV-List
ttp://forums.matronics.com
=_blank>http://www.matronics.com/contribution
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bicyclop(at)pacbell.net
Guest
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| Posted: Wed Sep 14, 2011 2:57 pm Post subject: Overheating cylinder |
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After I overhauled our engine, I had a cylinder reading 800+ degrees on my first flight. It was running way too well to be almost melted so I decided to ignore it, but also landed on my next circuit just to check it out. It turned out to be a loose connection at the probe.
Pax,
Ed Holyoke
On 9/14/2011 6:38 AM, Valovich, Paul wrote: [quote] <![endif]--> <![endif]-->
I had the same thing happen to me on 2 cylinders on 2 separate occasions during early phase 1 (new Aerosport IO-360). First time it was an obvious wiring issue – bad crimp that would intermittently make proper contact. The second time was also a wiring issue – but took a lot longer to discover. At first glance everything appeared ok – but more careful inspection revealed a loose wire.
In my case the temp variations were so rapid and extreme that I concluded the problem had to be electrical – not actual overheating. Sure got my attention, though.
[b]
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