Reinstall Rear Engine Exhaust

[Dan schultz]

Sending my collectors and receivers back to Acorn, ball joints leaking like a sieve. No need for soapy water. Hooked up the shop vac to the tailpipe whistling crazy air from the joints.

I did fly the aircraft the other day finally after 2.5 years, all things worked pretty well.

Dan
N67S

[Dan schultz]

Learning a few things about the exhaust ball joints. Paul at Acorn has verified through Cessna. The three bolts at the joints are 1550177, basically an AN3-14A that has threads down to a .5 grip and the springs are supposed to be compressed to a .5 length.

The parts manual shows on the left side bolt, then on the top flange washer, spring washer, nut ms20364-1032c, no castle nut or cotter pin.

The right side has a bolt, washer at the head of the bolt, on the top flange washer, spring, washer, then the lock nut.

The maintenance manual says bolts with castle nuts and cotter pins which obviously is the aircraft with ball joints prior to the P models, a change that was never made to the maintenance manual.

[Dan schultz]

Exhaust is on its way back from Acorn, we will see how those ball joints are now.

Dan

[Ed A]

I’m thinking about replacing the entire rear exhaust for my 1974 P337G from the turbo and wastegate back to the motor with the newer design, s/n 226 on, that has slip joints instead of all the clamps that leak. Just wondering if anyone else has tried this?