HarleyChatGroup now on the mobile TapaTalk Network
Results 1 to 6 of 6

Thread: 94 FLHTP Base Oil Leak

  1. #1
    Junior Member Just broke my cherry!
    Join Date
    Aug 2010
    Location
    Hillsborough,NJ
    Posts
    5

    94 FLHTP Base Oil Leak

    All,

    I have oil seepage in bottom head gasket of my bike I recently purchased.
    I was told it was okay to ride, just keep eye on oil level.

    The a Harley dealer I recently called refused to replace my bottom head gasket.
    He stated it could open a whole host of problems since Harley had a case insert problem in all evolution motors.
    Articles I have recently read stated insert problem only exists in 88 to 92 evo motors, not 94s
    I have also read that evo motors have gasket issue through inappropriate warm up time.

    I am now concerned the seller and his mechanic decieved me.
    Bike only has 14K miles on it.

    Do I need to replace gasket right away? Seepage seems to slow or stop after warmed up.
    Is there an threaded insert issue with 94 evo motor?
    Do I need to replace piston ring and gasket?

    Any help is appreciated.

  2. #2
    HCG Technical Senior Member
    Join Date
    Jul 2005
    Location
    Shingletown
    Posts
    1,811
    This is a common problem with evos...I had the same problem with my 1993 FLHS....I just watched my oil level and rode the bike....It was fine
    I let my mind wander.......It never came back

  3. #3
    Administrator Senior Member Wide's Avatar
    Join Date
    Aug 2004
    Location
    HCG World Headquarters, Signal Hill, CA
    Posts
    18,940

    Yes very common and not a real issue

    I have seen some folks add positive crankcase vents that cleared it right up. Pulling a slight vacuum on the lower end will do that
    .-/c-.,_ /
    (_)'==(_)


    "parts left out cost nothing and create no service problems" Boss Kettering

  4. #4
    HCG Technical Senior Member
    Join Date
    Jul 2005
    Location
    Shingletown
    Posts
    1,811
    hidden in the area under the seat, in my RK, I have a small aluminum radiator catch can, off one of my old race cars (it is about the size of a pepsi can)...The kuryakyn head breather vents into this...That way any oil is trapped here....from there it vents into my exhaust, at enough of an angle to create a vacuum in the line....There is a one way valve in the line between the catch can and the exhaust, to keep it from pushing pressure back up the line into the heads.....

    we used to vent the PCV into the header collector on the gassers. I wanted to do something like that for the street, without the burnt oil film on the back of my bike....so I got creative with the catch can
    I let my mind wander.......It never came back

  5. #5
    Junior Member Just broke my cherry!
    Join Date
    Aug 2010
    Location
    Hillsborough,NJ
    Posts
    5
    Quote Originally Posted by Heretic View Post
    hidden in the area under the seat, in my RK, I have a small aluminum radiator catch can, off one of my old race cars (it is about the size of a pepsi can)...The kuryakyn head breather vents into this...That way any oil is trapped here....from there it vents into my exhaust, at enough of an angle to create a vacuum in the line....There is a one way valve in the line between the catch can and the exhaust, to keep it from pushing pressure back up the line into the heads.....

    we used to vent the PCV into the header collector on the gassers. I wanted to do something like that for the street, without the burnt oil film on the back of my bike....so I got creative with the catch can
    Thanks Heretic and Wide!

    I know my way around race cars. Bikes are something different.

    Sounds like I have to get a maintance book for my Harley to learn all the components or become friends with Harley mechanic. Both couldn't hurt.

  6. #6
    Administrator Senior Member Wide's Avatar
    Join Date
    Aug 2004
    Location
    HCG World Headquarters, Signal Hill, CA
    Posts
    18,940

    no sweat man

    Dont think complicated these are briggs and strattons at best

    Just wick some pressure out of the case and it should stop. Also keep your oil a bit on the low side, they use a sump so it dont matter the level


    Welcome to the forums
    .-/c-.,_ /
    (_)'==(_)


    "parts left out cost nothing and create no service problems" Boss Kettering

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •