REFLECTOR: crankshaft seal

Jim & Sharon Beck jsbeck at charter.net
Tue Sep 4 09:54:04 CDT 2007


Thanks Scott & Ron
After I take my prop off so I can see what I've got I will just replace what is there and not worry about this retainer. Hope that is the leak I haven't been able to find for a year. I can get everything clean and the oil takes about 2 hour to find its way outside the cowl and after that its dirty every time I fly. Cant seem to see the seal area without taking the MT off.
thanks again for the insight.
Jim
  ----- Original Message ----- 
  From: Ron Brown 
  To: Velocity Aircraft Owners and Builders list 
  Sent: Tuesday, September 04, 2007 6:59 AM
  Subject: Re: REFLECTOR: crankshaft seal


  Jim,

  The recollection that I have is that this seal can blow out if the crankcase vent is is plugged - for example, iced up from flying in freezing conditions and not having an "ice hole" in the vent line inside the cowl to relieve the built up crankcase pressure.

  I used to have an ice hole in my vent line - but it seemed to be leaking oil mist onto the fire wall.  I did away with it and vowed not to fly in icing conditions.  Flying in ice can ruin your day and cause more problems than a frozen vent line.  I live in the sunny south and I can definitely avoid flying in ice.  If you are still worried about icing the vent line, you could route it so that it attaches/connects to the exhaust pipe, which would keep it plenty hot.

  I have not heard anything in particular to pusher engines and this seal retainer.  

  Ronnie


  ----- Original Message ----- 
  From: "Scott Derrick" <scott at tnstaafl.net>
  To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
  Sent: Tuesday, September 04, 2007 9:31 AM
  Subject: Re: REFLECTOR: crankshaft seal


  > My 520 has a retainer but it just helps hold the seal in place. If it 
  > did blow it sure wouldn't stop any oil from leaking.
  > 
  > My IO360 didn't have one... Not that others might have.
  > 
  > Scott
  > 
  > Jim & Sharon Beck wrote:
  >> Sorry for the lack of clarity.  It was explained to me as a retainer for the 
  >> seal that would help retain oil if the seal blew out
  >> thanks
  >> Jim
  >> 
  >> ----- Original Message ----- 
  >> From: "Scott Derrick" <scott at tnstaafl.net>
  >> To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
  >> Sent: Monday, September 03, 2007 7:12 PM
  >> Subject: Re: REFLECTOR: crankshaft seal
  >> 
  >> 
  >>> retainer for what?
  >>>
  >>> Jim & Sharon Beck wrote:
  >>>>
  >>>>      I just returned from canard flyin at Kanab and someone there
  >>>>     mentioned that on pusher engines a retainer is required on lycoming
  >>>>     engines. I am about to replace a leaking seal on my IO360
  >>>>      Leakcoming. Does anyone have any information on the retainer?
  >>>>     Thanks
  >>>>     Jim
  >>>>
  >>>>
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