Oxygen Sensor for 5KTQ

[harchris]

On the fresh Oxygen supply to the inside of a sensor, since the gases inside
the exhaust manifold are under pressure, and in some cases extremely hot,
wouldn't this tend to push hot gases out any holes in the O2 sensors? If the
gases are going out, how would fresh air get in? and wouldn't the hot gases
going out tend to melt the insulation around the wires?

Enquiring minds need to know.

Cheers
George