Loose Intake Pipe



Sometimes the intake pipes on Lycoming engines can come loose. This will cause an intake leak, usually indicated by a rough idle and higher EGT on the affected cylinder. The leak will also leave a tell-tale sign of dark material around the pipe from fretting. It takes a special internal swaging tool to reseat the pipe.

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Vic Syracuse
Vic is a fixed-wing and helicopter commercial pilot, CFII with ASMEL/ASES ratings, an A&P/IA, DAR, and EAA technical advisor and flight counselor. Passionately involved in aviation for over 40 years, he has built 11 aircraft and logged over 10,000 hours in 72 different kinds of aircraft. Vic volunteers as a Young Eagle pilot, has his own sport aviation business called Base Leg Aviation, and has written two books on aircraft prebuy and condition inspections.


  1. I had loose intake pipes starting around 1000 hrs. Tried some proseal around there which worked as a stopgap but eventually I found an engine shop that was willing to loan me the swaging tool. Lucky! Now all tight and good.


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