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  #1  
Old 05-21-2016, 06:18 AM
f1rocket's Avatar
f1rocket f1rocket is offline
 
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Default High EGT Warnings

One of my EGT signals gives me a warning every time I fly. Why should I care? All the other engine numbers are fine, and all the plugs are a nice Gray color. It runs great and I'm not inclined to worry about it. Should I?

I suspect a probe issue is causing it but even if the probe checks out fine, why would this be an issue?
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  #2  
Old 05-21-2016, 06:32 AM
vic syracuse vic syracuse is offline
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AT what temp do you have the high alarm configured?
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  #3  
Old 05-21-2016, 07:50 AM
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Piper J3 Piper J3 is offline
 
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I just had this issue with D-180 EMS. Replaced thermocouple and problem is fixed.

Dynon EGT, Hose Clamp, 0.75-1.25", Rotax
SKU: #100405-001 $47.00 shipped.
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  #4  
Old 05-21-2016, 08:43 AM
Mich48041 Mich48041 is offline
 
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Mike Bush wrote that "There is no limit for EGT."
The Savvy Aviator #59: EGT, CHT and Leaning
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  #5  
Old 05-21-2016, 09:16 AM
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If the EGT temperature is spiking is most likely a bad connection at the spade lugs or the DB pins.
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  #6  
Old 05-21-2016, 12:55 PM
cactusman cactusman is offline
 
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Cool

Quote:
Originally Posted by f1rocket View Post
One of my EGT signals gives me a warning every time I fly. Why should I care? All the other engine numbers are fine, and all the plugs are a nice Gray color. It runs great and I'm not inclined to worry about it. Should I?

I suspect a probe issue is causing it but even if the probe checks out fine, why would this be an issue?
I had the right one go...ordered a couple of extra...replaced the right...working fine....guess what?

...the left one is acting funky.

I think there might be a bad batch out there imho.

Yeah..... you can fool with recrimping/new connectors - that might be it....
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  #7  
Old 05-21-2016, 01:28 PM
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Could you mention how many hours you got on your probes?
My right EGT probe acted funny after my annual with wild fluctuations ending with the red cross (no, not this one, the one on the Skyview). That was at 140 hour. It bothered me a while and I ordered a new unit but before installing it, I noticed that the wire going to the probe was very tight so I gave it some slack: problem solved. Twenty hours later it still works fine... and I have got a spare!
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  #8  
Old 05-21-2016, 01:45 PM
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Quote:
Originally Posted by WingedFrog View Post
Could you mention how many hours you got on your probes?
As per post #3 above... I replaced my right EGT. It started acting up ~ 80 hours. It sort of healed itself for the next 15 hours and just two weeks ago it decided to give me grief. I tried re-crimping the connectors and fooled myself into thinking I had it fixed. New thermocouple purchased directly from Dynon fixed the problem and easy install with removing top cowl only.
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  #9  
Old 05-21-2016, 07:12 PM
vic syracuse vic syracuse is offline
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Quote:
Originally Posted by Mich48041 View Post
Mike Bush wrote that "There is no limit for EGT."
The Savvy Aviator #59: EGT, CHT and Leaning
I agree. That's why I asked where you had your limits set at. I see a number of airplanes that have EGT limits set around 1400 degrees.

Vic
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  #10  
Old 05-21-2016, 08:05 PM
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FasGlas FasGlas is offline
 
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You can always swap it with another probe (like 1&3 or 2&4) and see if the reading follows the probe or cylinder. Don't need to swap the connections. The probes do fail, mostly open up or wiring failure. If you've installed all the probes the same distance down the pipes from the flanges the EGT's should all be pretty close if the mixtures are closely equal in all the cylinders.

Last edited by FasGlas : 05-21-2016 at 08:09 PM.
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