The recommended CHT probe location on my Rotec R2800 is under the intake flange bolt. When I tried to install it there, the probe started to pancake out due to the large pre-load required at the bolt (~ 18.5 ft-lbs).In addition to the pancaking due to compression stress, the CHT probe also spins around the bolt axis due to the rotation of the bolt as it's being tightened, and in one case it sheared in one spot (see photo). The original probe shows the same compression, but it did not seem to have been cut. I'm not sure if this was just luck or some other reason. I've tried sandwiching the CHT probe under two washers to protect them a bit, but did not help all that much.OriginalProbe_LI.jpg
Does anyone have any techniques that they can recommend for installing this without breaking the temp sensor? I think the thermocouple spinning around the bolt axis is what is causing the largest damage. I'm not sure how I can prevent it from spinning.
I'm all out of ideas so any advice is appreciated!
RecommendedInstallLocation_1_LI.jpg
.EICHTProbes_LI.jpg