Fabricated New Exhaust Support and Replaced CHT Probe

I needed to move the exhaust support tubes outward to clear the SCAT tubes going to the heat muff.  Sadly, I didn’t get any pictures while the cowl was off, so I tried to take some pictures of what I did through the openings in the cowl.  I replaced the aluminum bar that ties all four pipes together with one that is 4″ longer.  I drilled additional holes in each end to attach the clips that tie the stainless tubing to the bar.  This moves these supports out about 1 5/8″ on each side.

I rerouted both SCAT tubes and replaced the piece that was worn by rubbing on the exhaust support.  Now there is plenty of clearance all around.  This piece of tubing now runs above the lower engine mount tubing so it doesn’t rest against the wire going to the alternator.

It’s pretty tough to see here, but the SCAT tubing from the heat muff to the firewall valve now runs under the horizontal tubing on the engine mount.  This shortens the tubing and provides a more direct path into the heat muff.

I received a new CHT probe from Aircraft Spruce, so I installed it to see if the problem was the probe of the connection.  This probe works just fine, so I’m going to redo the connections on the other one to see if the problem comes back.

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