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Old 12-10-2017, 08:39 PM
Jake14 Jake14 is offline
 
Join Date: May 2014
Location: Seattle
Posts: 119
Default air creaner bracket keeps getting bent

puzzled why the inboard lip of the air cleaner retaining frame keeps getting bent upwards. When I straighten it, after the next flight, it's bent upwards again about 3/16 to 1/4 in at the fwd inboard corner. It happens whether the rubber seal is short or long. Could the airflow over the bracket create a low pressure region which causes this?

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Old 12-10-2017, 08:43 PM
Bavafa Bavafa is offline
 
Join Date: Oct 2007
Location: Sacramento, CA
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Is it possible that you have a backfire thru your intake?
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Old 12-10-2017, 08:51 PM
Jake14 Jake14 is offline
 
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Location: Seattle
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Question

Haven't heard any backfiring, and the portion of the lip being bent is away from the filter element with nothing below it but the engine cavity.......
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Old 12-10-2017, 08:53 PM
Jake14 Jake14 is offline
 
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Location: Seattle
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Question

Haven't heard any backfiring, and the portion of the lip being bent is away from the filter element with nothing below it but the engine cavity.......

the crease of the bend is at the forward edge of the forward retaining screw
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Old 12-10-2017, 08:58 PM
crabandy crabandy is offline
 
Join Date: Jan 2010
Location: Ottawa, Ks
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I have serious doubts about air pressure being able to bend that metal lip. What's the closest thing the air filter retaining frame can hit? What's the clearance between the air filter retaining frame and the front inlet of the cowling? The lower baffling rubber looks likes it's had some serious rubbing going on, I'm guessing there needs to be more clearance between the cowling and the metal baffling/air filter retainer.
I would trim the cowling inlet another 1/4 inch then redo the rubber baffling material to lay on top of the metal air filter retaining frame.
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Old 12-11-2017, 11:57 AM
KeithB KeithB is offline
 
Join Date: Mar 2014
Location: Granbury, TX
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I did not have bending, but I did have wearing of the inlet ramp (metal) on the passenger side inlet. There was a gap at rest of about 1/8", but I believe that during the "dog shake" of engine start and shutdown, the baffle metal was impacting the fiberglass cowl - there is an amazing amount of flexing of that engine on its mount. I trimmed back the metal (or alternately you could trim the fiberglass) and the problem has been solved.
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