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73 365GTC4 question

Discussion in 'Technical Q&A' started by tbakowsky, Nov 6, 2004.

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  1. tbakowsky

    tbakowsky Two Time F1 World Champ
    Consultant Professional Ferrari Technician

    Sep 18, 2002
    20,042
    The Cold North
    Full Name:
    Tom
    #1 tbakowsky, Nov 6, 2004
    Last edited by a moderator: Sep 7, 2017
    I have this car in my shop right now. It had a really good oil leak for the cam covers. Once I removed the covers, I found that the o-rings that seal the chain cover to the cam cover have been cut. I assume this was done to aviod removing the timing cover from the engine. This was done by the dealer. I have also seen this same practice with the 348/328 car to avoid removing the camshafts during a major service, also performed by the dealer.

    Now my question to you experianced older v12 guys. I have NEVER had the front cover off of one of these engines. Have have done a bunch of other work to the car with this engine but have never really jumped in this far. I'm not in the least bit scared of it.

    What I would like to know is, how much time is involved in removing this cover? Are there any tricks to doing this in the car that I should be awear of?
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  2. Rifledriver

    Rifledriver Three Time F1 World Champ

    Apr 29, 2004
    37,288
    Cowboy Capitol of the World
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    Brian Crall
    #2 Rifledriver, Nov 6, 2004
     
  3. Ferrari_tech

    Ferrari_tech Formula 3

    Jul 28, 2003
    1,527
    UK
    Full Name:
    Malcolm W
    #3 Ferrari_tech, Nov 8, 2004
    Tom,

    If it's just the top "O" rings that you need to replace then they can be replaced with the engine in "situ". All you need to do is slacken all the nuts that secure the front cover and very carefully prise it away from the heads - it only has to me moved about a millimeter.

    Done loads of these in the past, the only risk is when disturbing the front cover you could introduce other leaks, but you've nothing to loose.
     
  4. ferrarifixer

    ferrarifixer F1 Veteran
    BANNED

    Jul 22, 2003
    8,520
    Melbourne
    Full Name:
    Phil Hughes
    #4 ferrarifixer, Nov 8, 2004
    I don't think I've ever serviced one with an O ring that wasn't cut. It's the same on 400/Daytona etc etc

    They don't leak if they have just the right amount of silicone applied and all other leaky places are tended to.

    You need to do the "shim in the slot as you assemble it" trick, but it's quite easy.
     

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