Securing EGT leads

[John Vance]

I've recently experienced a second EGT failure, and am interested in advice on securing the leads in a way that will help prevent a third. Should small-radius bends be avoided? Should it be doubled back and zip-tied to the rigid portion of the probe to limit motion in that area? Any other things that might help?

[Tom Baker]

I wouldn't double it back on itself. I normally have a fairly big loop, before it gets tied to the engine mount on the left side. The right goes into the wire bundle to the Dynon. The biggest issue I see is the left lead gets abused when checking or adding oil, because of its location near the oil tank.

[John Vance]

Thanks, Tom. Are the spade connectors for the right side buried in the wire bundle?

[Tom Baker]

Thanks, Tom. Are the spade connectors for the right side buried in the wire bundle?

 

Yes.

[Anticept]

You can bend the EGT. I've taken them as much as 60 degrees bend to get them out of the way with no adverse affects on a dozen so far.

[John Vance]

The one that failed was doubled back 180 degrees in a tight radius ( as in maybe 1/8"). I don't know if that's why it died but suspect that might be the case.

[Anticept]

Wait, they pushed the wire back 180, or they BENT the EGT itself 180 degrees?

 

Here's a photo of what I do: 

[John Vance]

It's just the flexible wire that was doubled back, not the rigid portion of the probe. Good to know you can bend that portion a little without a problem.

[Anticept]

The flexible portion has a stress relief (the spring). These should not be tied rigidly, there should be a small enough of a loop at the end of it.