Home » Public Forums » GMCnet » [GMCnet] Thermocouple replacement
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| Re: [GMCnet] Thermocouple replacement [message #251521 is a reply to message #251501] |
Wed, 04 June 2014 18:13   |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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JR,
Thanks for the reference and suggestion. Today I received a note from
Auber Instruments saying that they've shipped my order, which had been
misplaced. They sent another stating that the replacement they sent does
not come in the clamp-on style, for which I've already drilled the exhaust
pipes, so they want to know what style I want -- for the already-shipped
parts. :-)
I'll wait to see what they actually shipped, whether I'm likely to be
satisfied with the quality, etc., before trying an alternate source. I do
have an off-net offer of lab grade TC's in a profile of my choice, so
that's tempting at any rate.
One problem with the Omega offerings is that they don't seem to offer a
probe type that's really suitable for extension into the exhaust stream.
I'll check their offerings further, but the page you linked to shows no
such configuration.
Thanks for your help; I'll keep you posted on my progress,
Ken
On Wed, Jun 4, 2014 at 12:14 PM, John Wright wrote:
> Ken,
> I would recommend part#XCIB-K-4-5-10 which has a 10 foot lead. Runs
> about $63 each but is industrial quality. Has Inconel 600 jacket.
>
> http://www.omega.com/pptst/XCIB.html
>
> Just go down to the Part Number Builder at the bottom.
>
> JR Wright
> 78 Buskirk Stretch
> 75 Avion
> Michigan
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] Thermocouple replacement [message #251529 is a reply to message #251521] |
Wed, 04 June 2014 19:52 |
powerjon
Messages: 2446
Registered: January 2004
Karma: 5
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Senior Member |
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Ken,
Without seeing what you are presently using it is difficult for me to recommend a replacement that would be robust enough to survive in the exhaust stream of the exhaust header. You need a unit that is fairly stiff and vibration resistance. It must be a sheathed type possibly in a small thermowell that is screwed or braised onto the header pipe.Each exhaust pulse causes tip the unprotected thermocouple to move and to actually cause it to vibrate. If I can be of further help just let me know.
JR
On Jun 4, 2014, at 7:13 PM, Ken Henderson wrote:
> JR,
>
> Thanks for the reference and suggestion. Today I received a note from
> Auber Instruments saying that they've shipped my order, which had been
> misplaced. They sent another stating that the replacement they sent does
> not come in the clamp-on style, for which I've already drilled the exhaust
> pipes, so they want to know what style I want -- for the already-shipped
> parts. :-)
>
> I'll wait to see what they actually shipped, whether I'm likely to be
> satisfied with the quality, etc., before trying an alternate source. I do
> have an off-net offer of lab grade TC's in a profile of my choice, so
> that's tempting at any rate.
>
> One problem with the Omega offerings is that they don't seem to offer a
> probe type that's really suitable for extension into the exhaust stream.
> I'll check their offerings further, but the page you linked to shows no
> such configuration.
>
> Thanks for your help; I'll keep you posted on my progress,
>
> Ken
>
>
> On Wed, Jun 4, 2014 at 12:14 PM, John Wright wrote:
>
>> Ken,
>> I would recommend part#XCIB-K-4-5-10 which has a 10 foot lead. Runs
>> about $63 each but is industrial quality. Has Inconel 600 jacket.
>>
>> http://www.omega.com/pptst/XCIB.html
>>
>> Just go down to the Part Number Builder at the bottom.
>>
>> JR Wright
>> 78 Buskirk Stretch
>> 75 Avion
>> Michigan
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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J.R. Wright
GMC GreatLaker
GMC Eastern States
GMCMI
78 30' Buskirk Stretch
75 Avion Under Reconstruction
Michigan
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| Re: [GMCnet] Thermocouple replacement [message #251533 is a reply to message #251529] |
Wed, 04 June 2014 21:06 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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|
JR,
Here's the Auber Instruments TC we installed and had all the trouble with.
It seemed appropriate at the time and I still don't understand why both of
them failed immediately. The actual TC installation was done by a GMCer
who owns a custom truck shop in NC and has installed dozens of TC's in
diesel trucks. I'm sure the installation was not at fault.
What do you think of the clamp-on mount I used? Must I go to all the
trouble of removing the exhaust pipes and having bungs welded into them?
Ken
On Wed, Jun 4, 2014 at 8:52 PM, John Wright wrote:
> Ken,
> Without seeing what you are presently using it is difficult for me to
> recommend a replacement that would be robust enough to survive in the
> exhaust stream of the exhaust header. You need a unit that is fairly stiff
> and vibration resistance. It must be a sheathed type possibly in a small
> thermowell that is screwed or braised onto the header pipe.Each exhaust
> pulse causes tip the unprotected thermocouple to move and to actually cause
> it to vibrate. If I can be of further help just let me know.
>
> JR
> On Jun 4, 2014, at 7:13 PM, Ken Henderson wrote:
>
>> JR,
>>
>> Thanks for the reference and suggestion. Today I received a note from
>> Auber Instruments saying that they've shipped my order, which had been
>> misplaced. They sent another stating that the replacement they sent
> does
>> not come in the clamp-on style, for which I've already drilled the
> exhaust
>> pipes, so they want to know what style I want -- for the already-shipped
>> parts. :-)
>>
>> I'll wait to see what they actually shipped, whether I'm likely to be
>> satisfied with the quality, etc., before trying an alternate source. I
> do
>> have an off-net offer of lab grade TC's in a profile of my choice, so
>> that's tempting at any rate.
>>
>> One problem with the Omega offerings is that they don't seem to offer a
>> probe type that's really suitable for extension into the exhaust stream.
>> I'll check their offerings further, but the page you linked to shows no
>> such configuration.
>>
>> Thanks for your help; I'll keep you posted on my progress,
>>
>> Ken
>>
>>
>> On Wed, Jun 4, 2014 at 12:14 PM, John Wright
> wrote:
>>
>>> Ken,
>>> I would recommend part#XCIB-K-4-5-10 which has a 10 foot lead. Runs
>>> about $63 each but is industrial quality. Has Inconel 600 jacket.
>>>
>>> http://www.omega.com/pptst/XCIB.html
>>>
>>> Just go down to the Part Number Builder at the bottom.
>>>
>>> JR Wright
>>> 78 Buskirk Stretch
>>> 75 Avion
>>> Michigan
>>>
>>> _______________________________________________
>>> GMCnet mailing list
>>> Unsubscribe or Change List Options:
>>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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_______________________________________________
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Unsubscribe or Change List Options:
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] Thermocouple replacement [message #251534 is a reply to message #251533] |
Wed, 04 June 2014 21:11 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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JR,
It sometimes helps if I actually include the URL's I refer to!:
http://www.auberins.com/index.php?main_page=product_info&cPath=20_3&products_id=69
Ken H.
On Wed, Jun 4, 2014 at 10:06 PM, Ken Henderson
wrote:
> JR,
>
> Here's the Auber Instruments TC we installed and had all the trouble with.
> It seemed appropriate at the time and I still don't understand why both of
> them failed immediately. The actual TC installation was done by a GMCer
> who owns a custom truck shop in NC and has installed dozens of TC's in
> diesel trucks. I'm sure the installation was not at fault.
>
> What do you think of the clamp-on mount I used? Must I go to all the
> trouble of removing the exhaust pipes and having bungs welded into them?
>
> Ken
>
> On Wed, Jun 4, 2014 at 8:52 PM, John Wright
> wrote:
>
>> Ken,
>> Without seeing what you are presently using it is difficult for me to
>> recommend a replacement that would be robust enough to survive in the
>> exhaust stream of the exhaust header. You need a unit that is fairly stiff
>> and vibration resistance. It must be a sheathed type possibly in a small
>> thermowell that is screwed or braised onto the header pipe.Each exhaust
>> pulse causes tip the unprotected thermocouple to move and to actually cause
>> it to vibrate. If I can be of further help just let me know.
>>
>> JR
>> On Jun 4, 2014, at 7:13 PM, Ken Henderson wrote:
>>
>>> JR,
>>>
>>> Thanks for the reference and suggestion. Today I received a note from
>>> Auber Instruments saying that they've shipped my order, which had been
>>> misplaced. They sent another stating that the replacement they sent
>> does
>>> not come in the clamp-on style, for which I've already drilled the
>> exhaust
>>> pipes, so they want to know what style I want -- for the
>> already-shipped
>>> parts. :-)
>>>
>>> I'll wait to see what they actually shipped, whether I'm likely to be
>>> satisfied with the quality, etc., before trying an alternate source.
>> I do
>>> have an off-net offer of lab grade TC's in a profile of my choice, so
>>> that's tempting at any rate.
>>>
>>> One problem with the Omega offerings is that they don't seem to offer a
>>> probe type that's really suitable for extension into the exhaust
>> stream.
>>> I'll check their offerings further, but the page you linked to shows no
>>> such configuration.
>>>
>>> Thanks for your help; I'll keep you posted on my progress,
>>>
>>> Ken
>>>
>>>
>>> On Wed, Jun 4, 2014 at 12:14 PM, John Wright
>> wrote:
>>>
>>>> Ken,
>>>> I would recommend part#XCIB-K-4-5-10 which has a 10 foot lead. Runs
>>>> about $63 each but is industrial quality. Has Inconel 600 jacket.
>>>>
>>>> http://www.omega.com/pptst/XCIB.html
>>>>
>>>> Just go down to the Part Number Builder at the bottom.
>>>>
>>>> JR Wright
>>>> 78 Buskirk Stretch
>>>> 75 Avion
>>>> Michigan
>>>>
>>>> _______________________________________________
>>>> GMCnet mailing list
>>>> Unsubscribe or Change List Options:
>>>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>>>>
>>> _______________________________________________
>>> GMCnet mailing list
>>> Unsubscribe or Change List Options:
>>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>>
>
>
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] Thermocouple replacement [message #251539 is a reply to message #251529] |
Wed, 04 June 2014 22:39 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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Ken, My airplane has one EGT probe per cylinder. Two of them started acting up after 25 years of service so I replaced all of them about 6 years ago. I got them, from a company in Michigan. Now I just need to find that company. They are the clamp on type.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: [GMCnet] Thermocouple replacement [message #251556 is a reply to message #251529] |
Thu, 05 June 2014 08:45 |
powerjon
Messages: 2446
Registered: January 2004
Karma: 5
|
Senior Member |
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Ken,
The parts from Auber look to be the right stuff that should work. The picture shows a very good quality assemble of the TC. The clamp on mount should not be a problem unless you are have an exhaust leak that is noticeable and require a little high temp ceramic sealant. I guess that the real issue is understanding the failure mode of the previous TC’s.
JR
On Jun 4, 2014, at 8:52 PM, John Wright wrote:
> Ken,
> Without seeing what you are presently using it is difficult for me to recommend a replacement that would be robust enough to survive in the exhaust stream of the exhaust header. You need a unit that is fairly stiff and vibration resistance. It must be a sheathed type possibly in a small thermowell that is screwed or braised onto the header pipe.Each exhaust pulse causes tip the unprotected thermocouple to move and to actually cause it to vibrate. If I can be of further help just let me know.
>
> JR
> On Jun 4, 2014, at 7:13 PM, Ken Henderson wrote:
>
>> JR,
>>
>> Thanks for the reference and suggestion. Today I received a note from
>> Auber Instruments saying that they've shipped my order, which had been
>> misplaced. They sent another stating that the replacement they sent does
>> not come in the clamp-on style, for which I've already drilled the exhaust
>> pipes, so they want to know what style I want -- for the already-shipped
>> parts. :-)
>>
>> I'll wait to see what they actually shipped, whether I'm likely to be
>> satisfied with the quality, etc., before trying an alternate source. I do
>> have an off-net offer of lab grade TC's in a profile of my choice, so
>> that's tempting at any rate.
>>
>> One problem with the Omega offerings is that they don't seem to offer a
>> probe type that's really suitable for extension into the exhaust stream.
>> I'll check their offerings further, but the page you linked to shows no
>> such configuration.
>>
>> Thanks for your help; I'll keep you posted on my progress,
>>
>> Ken
>>
>>
>> On Wed, Jun 4, 2014 at 12:14 PM, John Wright wrote:
>>
>>> Ken,
>>> I would recommend part#XCIB-K-4-5-10 which has a 10 foot lead. Runs
>>> about $63 each but is industrial quality. Has Inconel 600 jacket.
>>>
>>> http://www.omega.com/pptst/XCIB.html
>>>
>>> Just go down to the Part Number Builder at the bottom.
>>>
>>> JR Wright
>>> 78 Buskirk Stretch
>>> 75 Avion
>>> Michigan
>>>
>>> _______________________________________________
>>> GMCnet mailing list
>>> Unsubscribe or Change List Options:
>>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
J.R. Wright
GMC GreatLaker
GMC Eastern States
GMCMI
78 30' Buskirk Stretch
75 Avion Under Reconstruction
Michigan
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| Re: [GMCnet] Thermocouple replacement [message #251562 is a reply to message #251556] |
Thu, 05 June 2014 11:06 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
|
Senior Member |
|
|
JR,
My problem right now is that they're shipping me a "heavier duty" version
of that TC ('though the probe tip is smaller in diameter) which does not
come with a clamp mount; I'll have to tap for a 1/8 NPT, or similar, into
the thin exhaust tube. Or remove the exhaust pipes and weld in bungs. :-(
I'll see what actually arrives.
Ken
On Thu, Jun 5, 2014 at 9:45 AM, John Wright wrote:
> Ken,
> The parts from Auber look to be the right stuff that should work. The
> picture shows a very good quality assemble of the TC. The clamp on mount
> should not be a problem unless you are have an exhaust leak that is
> noticeable and require a little high temp ceramic sealant. I guess that
> the real issue is understanding the failure mode of the previous TC’s.
> JR
> On Jun 4, 2014, at 8:52 PM, John Wright wrote:
>
>> Ken,
>> Without seeing what you are presently using it is difficult for me to
> recommend a replacement that would be robust enough to survive in the
> exhaust stream of the exhaust header. You need a unit that is fairly stiff
> and vibration resistance. It must be a sheathed type possibly in a small
> thermowell that is screwed or braised onto the header pipe.Each exhaust
> pulse causes tip the unprotected thermocouple to move and to actually cause
> it to vibrate. If I can be of further help just let me know.
>>
>> JR
>> On Jun 4, 2014, at 7:13 PM, Ken Henderson
> wrote:
>>
>>> JR,
>>>
>>> Thanks for the reference and suggestion. Today I received a note from
>>> Auber Instruments saying that they've shipped my order, which had been
>>> misplaced. They sent another stating that the replacement they sent
> does
>>> not come in the clamp-on style, for which I've already drilled the
> exhaust
>>> pipes, so they want to know what style I want -- for the
> already-shipped
>>> parts. :-)
>>>
>>> I'll wait to see what they actually shipped, whether I'm likely to be
>>> satisfied with the quality, etc., before trying an alternate source.
> I do
>>> have an off-net offer of lab grade TC's in a profile of my choice, so
>>> that's tempting at any rate.
>>>
>>> One problem with the Omega offerings is that they don't seem to offer a
>>> probe type that's really suitable for extension into the exhaust
> stream.
>>> I'll check their offerings further, but the page you linked to shows no
>>> such configuration.
>>>
>>> Thanks for your help; I'll keep you posted on my progress,
>>>
>>> Ken
>>>
>>>
>>> On Wed, Jun 4, 2014 at 12:14 PM, John Wright
> wrote:
>>>
>>>> Ken,
>>>> I would recommend part#XCIB-K-4-5-10 which has a 10 foot lead. Runs
>>>> about $63 each but is industrial quality. Has Inconel 600 jacket.
>>>>
>>>> http://www.omega.com/pptst/XCIB.html
>>>>
>>>> Just go down to the Part Number Builder at the bottom.
>>>>
>>>> JR Wright
>>>> 78 Buskirk Stretch
>>>> 75 Avion
>>>> Michigan
>>>>
>>>> _______________________________________________
>>>> GMCnet mailing list
>>>> Unsubscribe or Change List Options:
>>>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>>>>
>>> _______________________________________________
>>> GMCnet mailing list
>>> Unsubscribe or Change List Options:
>>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] Thermocouple replacement [message #251585 is a reply to message #251562] |
Thu, 05 June 2014 16:15 |
Carl S.
Messages: 4186
Registered: January 2009
Location: Tucson, AZ.
Karma: 13
|
Senior Member |
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Ken,
If you have to weld in some bungs, these are pretty cool:
http://www.motoiq.com/MagazineArticles/ID/3391/Burns-Stainless-Announces-Their-New-Flanged-O2-Sensor-Bung.aspx
They may only be available for o2 sensors though.
Carl Stouffer
'75 ex Palm Beach
Tucson, AZ.
Chuck Aulgur Reaction Arm Disc Brakes, Quadrabags, 3.70 LSD final drive, Lenzi knuckles/hubs, Dodge Truck 16" X 8" front wheels, Rear American Eagles, Solar battery charging. GMCSJ and GMCMI member
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| Re: [GMCnet] Thermocouple replacement [message #251592 is a reply to message #251585] |
Thu, 05 June 2014 18:17 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
|
Senior Member |
|
|
Auber offers adapters for 'most any thread, so I could use those, which are
pretty nifty. Sure hope I don't have to got that route. If I do, it will
be a while before I'm monitoring EGT again. While they ain't leakin' I
ain't removin' those pipes.
Ken H.
On Thu, Jun 5, 2014 at 5:15 PM, Carl Stouffer wrote:
> Ken,
>
> If you have to weld in some bungs, these are pretty cool:
>
>
> http://www.motoiq.com/MagazineArticles/ID/3391/Burns-Stainless-Announces-Their-New-Flanged-O2-Sensor-Bung.aspx
>
> They may only be available for o2 sensors though.
> --
> Carl Stouffer
> '75 ex Palm Beach
> Tucson, AZ.
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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