On Saturday, August 4, 2018 at 10:14:16 AM UTC-4, Arlen Holder wrote:
On 3 Aug 2018 23:27:26 GMT, Paul in Houston TX wrote:

I wouldn't worry about it. Any leakage would be minor.
However, if you are worried about it you can put some high temp
sealer around it.
Don't know if a hose would work in this situation or not due to engine noise.
Get lenght of small hose, stick one end in ear, and use the other end
to listen for leaks.

Thanks for that advice on the high temp sealer.
Someone said that the threads are the ground for the electrical connection.


I tend to doubt that. In my experience with modern cars, the sensors
all have their own ground wires. Especially for a sensor, you want to
be sure it has a known, quality, direct path back to where it's being
measured.