I have noticed that my #2 EGT will occasionally spike up to max red after a couple of hiccups as it moves up quickly. CHT is 320 and steady, than the spike will just go back to normal. Hard to predict. Happened once at run-up, once at cruise. I looked at the pipes and everything looks right, probe looks normal too.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an alternative browser.
You should upgrade or use an alternative browser.
EGT spike
- Thread starter preid
- Start date
In my experience, the blade connectors for the thermocouple wires cause this type of flakiness. The hot and cold cycle will work the connectors just ever so slightly loose, then the vibration will finish the job and cause just enough resistance to vary the millivolts and thus temp readings.
As a first measure, i made sure the blade connectors were solidly installed then i put some tight fitting heat shrink over both connectors. The theory is the heat shrink will help hold the connectors together and not let the vibration cycle work them loose.
For the past 50 hours, the heat shrink solution has held up so far. If they go flakey again, i may consider using solder.
As a first measure, i made sure the blade connectors were solidly installed then i put some tight fitting heat shrink over both connectors. The theory is the heat shrink will help hold the connectors together and not let the vibration cycle work them loose.
For the past 50 hours, the heat shrink solution has held up so far. If they go flakey again, i may consider using solder.
skydancer
RV-7 O-360 CS Prop. Dual Skyviews/AHRS. TruTrak AP
You are not alone, I have had two EGT failed like that, both were the bad connectors.
The end of the wire bent like a U-shape, the insolator on half of "U" was stripped, the other half was not, so, when factory installer crimps the spade terminal to the wire, only half of the U was contacted with the terminal.
The other half of the insolated wire now pushes against the spade terminal and created a space for the problem to occur.
The end of the wire bent like a U-shape, the insolator on half of "U" was stripped, the other half was not, so, when factory installer crimps the spade terminal to the wire, only half of the U was contacted with the terminal.
The other half of the insolated wire now pushes against the spade terminal and created a space for the problem to occur.