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  #1  
Old 06-16-2011, 02:53 PM
Lapsley Lapsley is offline
 
Join Date: Jun 2010
Location: Okeechobee, FL
Posts: 14
Default High EGT

What besides a bad sensor or connection will cause high EGT's Just slightly above 1500,

Roger
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  #2  
Old 06-16-2011, 03:02 PM
Mike S's Avatar
Mike S Mike S is offline
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Join Date: Sep 2005
Location: Dayton Airpark, NV A34
Posts: 15,420
Default

I would think a burnt, or stuck exhaust valve might do it.

Is the CHT normal on that same cyl???

did you try switching the probes around to see if the problem follows the probe??
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VAF 909

Rv-10, N210LM.

Flying as of 12/4/2010

Phase 1 done, 2/4/2011

Sold after 240+ wonderful hours of flight.

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  #3  
Old 06-16-2011, 07:37 PM
DennisRhodes DennisRhodes is offline
 
Join Date: Jul 2007
Location: Taylorsville, Ga
Posts: 798
Default Odds are Bad EGT probe.

The odds are bad EGT probe the Thermocouples used for that service usually go to 1600 F when they fail. The probe is where I would start with troubleshooting.
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  #4  
Old 06-17-2011, 05:07 PM
BlueColorKat BlueColorKat is offline
 
Join Date: Dec 2008
Location: Murphy, NC
Posts: 22
Default High EGT

We got the high EGT alarm several times. Temps would go from normal to high alarm for several minutes then go back to normal. All other temps were good. Redid the elec. connection and problem went away.

Jim Olson
Blairsville, GA
RV-12. 120141, N126BJ
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  #5  
Old 06-19-2011, 06:45 AM
Lapsley Lapsley is offline
 
Join Date: Jun 2010
Location: Okeechobee, FL
Posts: 14
Default EGT Jigh Temp

The EGT went high for about 30 sec and then returned to normal. CHT stayed normal.

Would a stuck valve on a 20 hour new engine do this"

Roger
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  #6  
Old 06-19-2011, 11:01 AM
N223JH N223JH is offline
 
Join Date: Apr 2008
Location: Boerne, TX
Posts: 228
Default Check Fittings

Roger, I had some intermittant very-high EGTs on the RV12/Dynon 180. Dynon Forum suggested checking the male-female fittings up there by the fuel manifold. I put a little dielectric grease on 'em and really jammed them together with two pair of needle-nose pliers. Normal readings since.

Jim
RV12 #264
Way too windy to fly this kite today.
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  #7  
Old 06-21-2011, 08:30 AM
jte65 jte65 is offline
 
Join Date: Feb 2008
Location: Avon, Indiana
Posts: 341
Default Ditto

I too have had the same problem twice now. In fact, things can be normal for several hours and then suddenly, readings become erratic. Given how erratic they are and the fact that all other engine indications were normal, it was clear that the EGT was not accurate. In fact, mine sometimes fluctated to a negative value! My spade connectors were crimped using a very high quality crimping tool but I still discovered that it appeared to be a issue at the crimp (after replacing a probe, only to find it was probably ok). I have found it is critical to very carefully strip the insulation on these wires, making sure that the non-metallic strands (the ones that look to be silk) are carefully cut away. Then mark the wire to make certain that the insertion in the spade is absolutely correct during crimping

Jeff
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