EGT/AFR sensor installation

I received the exhaust pipes from Custom Aircraft Parts (model 33279 with the studs for better heat exchange):

Exhaust parts after unboxing

Heat-exchanging studs around the exhaust pipes

I test-fit them on the engine, and took the opportunity to mark all the EGT sensor and O2 sensor holes:

Exhaust pipes attached to the right side of the engine

Exhaust pipes attached to the left side of the engine

Exhaust tube markings for the EGT sensor holes

Exhaust tube marking for the last EGT sensor hole

Assessing EGT sensor interference with the spark plug wires

I then drilled those holes and installed the EGT sensors in them:

EGT sensor attached to exhaust tube

EGT sensors attached to exhaust tubes

The O2 sensor hole is significantly larger (7/8"), and required welding a bung to it (I just paid someone to do the welding part):

Oxygen sensor bung, welded to the exhaust tube

Oxygen sensor and EGT probe attached to aft left exhaust tube

With this, the exhaust stack is ready to install in place.

Time lapse:


Total exhaust time: 5.1h

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