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libertyva(at)msn.com
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 Posted: Wed Mar 17, 2010 12:50 am Post subject: Mystery of the low CHT-googled |
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Stormy,
Thanks for sharing your mystery solving skills with us.
I guess better a CHT wire than a Mag wire.......or something else.
I'm chasing down a EI fuel gauge, right tank, intermittent off /on reading on my capacitance system now. Tank good, converter good, unit sent back to EI for checkout, next thing is to change factory wiring harness!! Big PITA.
Larry,
Thanks for explaining the "let me google that for you" very cool. I never knew that !
Bob Martin
Louisa, VA
Date: Mon, 15 Mar 2010 21:56:07 -0400
Subject: Re: Mystery of the low CHT solved
From: larry(at)bowenaero.com
To: rvsoutheast-list(at)matronics.com
In case you or someone else missed the reference to "let me google that for you"
See http://lmgtfy.com. Or in this example:
http://lmgtfy.com/?q=cht+bayonet+probe+adapters
--
Larry Bowen
Larry(at)BowenAero.com
http://BowenAero.com
On Mon, Mar 15, 2010 at 4:51 PM, Bill Boyd <sportav8r(at)gmail.com (sportav8r(at)gmail.com)> wrote:
| Quote: | "Here. Let me Google that for you..."
Answered my own question with a trip to the GRT website - they sell replacement screw-in bayonet probe adapters for 5 bucks. I'll be good to go when the mail runs later this week.
-Stormy
On Mon, Mar 15, 2010 at 11:36 AM, Bill Boyd <sportav8r(at)gmail.com (sportav8r(at)gmail.com)> wrote:
| Quote: | Cause of my recent low (190-210*F) CHT's on #4 cylinder, with normal pre-start readings and normal EGT's and power in flight, was just what one might suspect before even pulling the cowl - a faulty sensor; in this case, dangling free of the cylinder head, leaning against the intake manifold tube.
What's curious is how the twist and lock spring-loaded connector came loose on this bayonet probe: the tiny spot-welded pin that protrudes radially from the side of stainless barrel that screws into the cylinder head, which the probe cap is slotted to lock upon, fell out of its hole. I will find out soon if I need to buy a whole new sensor or just the mounting assembly. These probes are 12 years old and have 750 hours on them. I see no way to anticipate or detect this kind of failure before it happens. Fortunately, it's not a big safety-of-flight item to suddenly get a low CHT reading if the engine is still making normal power.
Off to call GRT and see what's available in the way of spare parts...
-Stormy
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st" target="_blank">http://www.matronics.com/Navigator?RVSouthEast-List
tp://forums.matronics.com
_blank">http://www.matronics.com/contribution
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List">http://www.matronics.com/Navigator?RVSouthEast-List
onics.com
ww.matronics.com/contribution
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Hotmail has tools for the New Busy. Search, chat and e-mail from your inbox. Learn More. [quote][b]
| | - The Matronics RVSouthEast-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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sportav8r(at)gmail.com
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| Posted: Wed Mar 17, 2010 11:34 am Post subject: Mystery of the low CHT-googled |
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Bob - don't you hate electrical gremlins? They're the worst sort.
Almost done with my annual... new strobe head for the belly, replace a worn alternator mounting bolt, lash up the FWF wiring with fresh zip-ties, repair bottom damage to a wheel pant (I hate fiberglass work!) and repack the wheel bearings... and we're GTG.
OUR FLY-IN IS ON FOR JUNE 26th!
-Stormy
On Tue, Mar 16, 2010 at 8:31 AM, BOB MARTIN <libertyva(at)msn.com (libertyva(at)msn.com)> wrote:
[quote] Stormy,
Thanks for sharing your mystery solving skills with us.
I guess better a CHT wire than a Mag wire.......or something else.
I'm chasing down a EI fuel gauge, right tank, intermittent off /on reading on my capacitance system now. Tank good, converter good, unit sent back to EI for checkout, next thing is to change factory wiring harness!! Big PITA.
Larry,
Thanks for explaining the "let me google that for you" very cool. I never knew that !
Bob Martin
Louisa, VA
Date: Mon, 15 Mar 2010 21:56:07 -0400
Subject: Re: RVSouthEast-List: Mystery of the low CHT solved
From: larry(at)bowenaero.com (larry(at)bowenaero.com)
To: rvsoutheast-list(at)matronics.com (rvsoutheast-list(at)matronics.com)
In case you or someone else missed the reference to "let me google that for you"
See http://lmgtfy.com. Or in this example:
http://lmgtfy.com/?q=cht+bayonet+probe+adapters
--
Larry Bowen
Larry(at)BowenAero.com
http://BowenAero.com
On Mon, Mar 15, 2010 at 4:51 PM, Bill Boyd <sportav8r(at)gmail.com (sportav8r(at)gmail.com)> wrote:
| Quote: | "Here. Let me Google that for you..."
Answered my own question with a trip to the GRT website - they sell replacement screw-in bayonet probe adapters for 5 bucks. I'll be good to go when the mail runs later this week.
-Stormy
On Mon, Mar 15, 2010 at 11:36 AM, Bill Boyd <sportav8r(at)gmail.com (sportav8r(at)gmail.com)> wrote:
| Quote: | Cause of my recent low (190-210*F) CHT's on #4 cylinder, with normal pre-start readings and normal EGT's and power in flight, was just what one might suspect before even pulling the cowl - a faulty sensor; in this case, dangling free of the cylinder head, leaning against the intake manifold tube.
What's curious is how the twist and lock spring-loaded connector came loose on this bayonet probe: the tiny spot-welded pin that protrudes radially from the side of stainless barrel that screws into the cylinder head, which the probe cap is slotted to lock upon, fell out of its hole. I will find out soon if I need to buy a whole new sensor or just the mounting assembly. These probes are 12 years old and have 750 hours on them. I see no way to anticipate or detect this kind of failure before it happens. Fortunately, it's not a big safety-of-flight item to suddenly get a low CHT reading if the engine is still making normal power.
Off to call GRT and see what's available in the way of spare parts...
-Stormy
|
List">http://www.matronics.com/Navigator?RVSouthEast-List
onics.com
ww.matronics.com/contribution
|
Hotmail has tools for the New Busy. Search, chat and e-mail from your inbox. Learn More. | Quote: |
st" target="_blank">http://www.matronics.com/Navigator?RVSouthEast-List
tp://forums.matronics.com
_blank">http://www.matronics.com/contribution
|
[b]
| | - The Matronics RVSouthEast-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?RVSouthEast-List |
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