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Auxiliary bearing puller

Discussion in '308/328' started by Jkuz, Sep 17, 2016.

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  1. Jkuz

    Jkuz Karting
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    #1 Jkuz, Sep 17, 2016
    I have a problem and need some help. After recently getting the major service done on my 1985 308, I noticed a small oil leak so I took the car back to the mechanic that serviced it. He found the leak coming from the auxiliary shaft on the right side of the engine. Apparently, the inner seal has failed, necessitating the removal of the aux shaft bearing. I'm told there is a special bearing puller for this job, but my mechanic doesn't have one, and is having a hard time finding one. He says he can get one from Ferrari for about $3000, but neither he or I is too excited about paying that for a tool with limited application. He doesn't want to break the bearing out and risk causing more collateral damage to the engine, and I definitely don't want that to happen, either. The third option is taking out the engine and taking the whole thing apart, and I'd rather he didn't do that, either.

    Does anyone know where we might find one of these bearing pullers we could borrow or rent? The car is a euro version, if that makes a difference.
     
  2. sp1der

    sp1der F1 Rookie

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    #2 sp1der, Sep 17, 2016
    Last edited by a moderator: Sep 7, 2017
    It would help if you had a picture, the only places on the rhs on the engine that could leak, excluding cam seals are the main crank seal or the cam drive gears. It maybe possible if it is one of these seals to hook the old one out and press in a new seal. The crank mass damper or drive pulleys would have to come off however.
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  3. Martin308GTB

    Martin308GTB F1 Rookie

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    #3 Martin308GTB, Sep 17, 2016
    Last edited: Sep 17, 2016
    Since you are talking of an 'inner seal', which requires removal of the bearing first, I assume you are talking about the lower camdrive bearing. For removal of that bearing you need something like this:

    Sykes-Pickavant

    This page also shows the method how to pull between the inner and outer race. Destroying and pulling the cage to create space between the balls for the puller adaptors.

    If it's too expensive, a machining shop should be able to make a pair of adaptors fitting a common puller.

    Best
    Martin
     
  4. sp1der

    sp1der F1 Rookie

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    #4 sp1der, Sep 17, 2016
    The inner seal is nothing more than a very thin washer, I would be very surprised if this is the problem.
     
  5. Martin308GTB

    Martin308GTB F1 Rookie

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    #5 Martin308GTB, Sep 17, 2016
    Last edited by a moderator: Sep 7, 2017
    No, on the later design it's a seal ring.

    Early design sequence:
    Inner bearing, outer bearing (open bearing running in the engine oil), radial seal ring

    Later design sequence, since late carb cars (from GTB engine 01105, GTS engine 03945):

    Inner bearing, radial seal ring, outer bearing (sealed, lifetime lubricated bearing)

    I refer to spare parts book 308GTB/GTS June 80, Tav. 8, which also shows the difference. Left above old, main illustration new.

    I had that problem years ago.

    Best Regards
    Martin
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  6. sp1der

    sp1der F1 Rookie

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    #6 sp1der, Sep 17, 2016
    intereseting, if thats the case I would think its very hard to change the intetnal seal without the front cover coming off.
     
  7. Martin308GTB

    Martin308GTB F1 Rookie

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    #7 Martin308GTB, Sep 17, 2016
    It works with the right puller for the bearing and two long sheet metal screws for the seal ring.
    Though I had the engine out, since I wanted new inner bearings as well. Transmission separated, front cover off. Dry-sump engines make things more complicated because of the chain driven scavenge pump.

    Best
    Martin
     
  8. yelcab

    yelcab F1 World Champ
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    #8 yelcab, Sep 17, 2016
    Jkuz

    I have a set of those pullers if you want to borrow it
     
  9. Jkuz

    Jkuz Karting
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    #9 Jkuz, Sep 17, 2016
    That's a lot of help and information while I was sleeping!!! Yelcab, if I could borrow your bearing pullers I'd be forever grateful! Please PM me and let me know where and when I could meet with you to pick them up.
     
  10. smg2

    smg2 F1 World Champ
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    #10 smg2, Sep 17, 2016
    Last edited by a moderator: Sep 7, 2017
    Here's a pic of the front cover assy torn down. While the seals and bearings can be done in-situ it's going to be a PITA and the likely hood of it leaking again probably still pretty high. The layout from outside to inside is such:
    'C' clip
    Sealed bearing
    spring washer
    'C' clip
    inboard oil seal

    removing the inboard oil seal with the cover still attached is doable but the stack of the parts makes getting them in and out a real bugger. Good luck.
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  11. Jkuz

    Jkuz Karting
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    #11 Jkuz, Sep 17, 2016
    Thanks so much for all the help. I'll let you know how it goes.
     

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