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Thread: Front crank Seal

  1. #51

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    Default Re: Crankcase seal leaking

    Quote Originally Posted by Kelliots View Post
    Looks like my nose seal (crankcase) is leaking, I'm getting oil on the bottom front of my engine and I traced it up to behind the prop flange area. I checked my crankcase breather line, its not blocked. I've never replaced one of these, my buddy who has 7 planes (most not flying) says it can be difficult. I printed off the Lycoming Svc. Instruction 1324C on doing it, so I have some guidance. I will be using the Dow 737 sealant per instructions. Thoughts or hints? Its a LYC o-235-C1B on my Colt. Thanks much.....
    Also, what sealant do you use, the Dow 737?

  2. #52

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    Default Re: Crankcase seal leaking

    I would go with with what Lycoming recommends. The owner and senior A&P here likes high temp silicone (Ultra Copper from Permatex).
    "Good judgement comes from experience, and experience comes from bad judgement." - Fred Brooks

  3. #53
    Stephen's Avatar
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    Default Re: Crankcase seal leaking

    Definitely heat up a one piece seal, it is much easier to install. Put it in very hot water or oil to make it softer.
    "You can only tie the record for flying low."

  4. #54

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    Default Re: Crankcase seal leaking

    Quote Originally Posted by Stephen View Post
    Definitely heat up a one piece seal, it is much easier to install. Put it in very hot water or oil to make it softer.
    Good advice but I can’t remember the last time I saw a good way to heat water in a hangar unless something like a camp stove or hot plate was brought from home. A microwave could be used to heat the water too but I don’t keep any of those things in the hangar. Or even my shop at the house for that matter.
    "Good judgement comes from experience, and experience comes from bad judgement." - Fred Brooks

  5. #55
    JPerkins's Avatar
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    Default Re: Crankcase seal leaking

    Lay it on the dash of your car over the defroster with the heater on high.
    Jason Perkins

  6. #56
    Stephen's Avatar
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    Default Re: Crankcase seal leaking

    Quote Originally Posted by Jeff J View Post
    Good advice but I can’t remember the last time I saw a good way to heat water in a hangar unless something like a camp stove or hot plate was brought from home. A microwave could be used to heat the water too but I don’t keep any of those things in the hangar. Or even my shop at the house for that matter.
    How do you make your coffee when hanging out at your den?
    "You can only tie the record for flying low."

  7. #57

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    Aug 2012
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    Kewanee, IL
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    Default Re: Crankcase seal leaking

    I believe split seal and full seal are interchangeable. I always use split and put the seam at 1 o'clock. Push the seal in 1/4 way before putting sealant on so not to have sealant covering up oil return hole etc.--Ross

  8. #58
    Administrator Steve Pierce's Avatar
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    Default Re: Front crank Seal

    I merged several threads on the same subject. Also some good information on this thread. http://www.shortwingpipers.org/forum...371#post108371

    Be willing to loan my crank shaft seal tool to a contributing member.

  9. #59

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    Default Re: Front crank Seal

    Quote Originally Posted by Steve Pierce View Post
    I merged several threads on the same subject. Also some good information on this thread. http://www.shortwingpipers.org/forum...371#post108371

    Be willing to loan my crank shaft seal tool to a contributing member.
    Thanks Steve, I'll take you up on that offer and PM you later. Bought the seal yesterday from Aircraft Specialties here in TUL, so may try to do it this weekend or as soon as I get your install tool. Was planning on renewing, so will do it now.

  10. #60
    Stephen's Avatar
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    Default Re: Front crank Seal

    Quote Originally Posted by Steve Pierce View Post
    I merged several threads on the same subject. Also some good information on this thread. http://www.shortwingpipers.org/forum...371#post108371

    Be willing to loan my crank shaft seal tool to a contributing member.
    Steve,

    Does your tool look like a bent screw driver or is it that expensive Lycoming seal installer? I've always used large screw drivers.
    "You can only tie the record for flying low."

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