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Cam Blocker / Belt Change

Discussion in '308/328' started by fin59shaw, Feb 15, 2015.

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  1. fin59shaw

    fin59shaw Rookie

    Jan 18, 2009
    38
    Sedalia, Missouri
    Full Name:
    Rusty
    #1 fin59shaw, Feb 15, 2015
    I know there has to be something posted already, but I can't find anything. Would someone please tell me where I can find a cam blocker for a 308? I have seen some home made versions out of wood, but I'd just like to buy a tool. A part number / link would be really helpful.
    Thanks!
     
  2. 4redno

    4redno Formula 3

    Mar 21, 2006
    1,067
    Seattle, WA
    Full Name:
    Keith Mitchell Wintraub
    #2 4redno, Feb 15, 2015
    The tool is available from Unobtainium Supply Co. - HOME

    See page 11 of their e-catalog.

    No affiliation. Heck, I don't even have a Ferrari at the moment.

    Cheers,

    Keith
     
  3. waymar

    waymar Formula 3

    Sep 2, 2008
    1,354
    Northeast, PA - USA
    Full Name:
    Wayne Martin
    #3 waymar, Feb 15, 2015
    On my 308 GTSi - I use a hockey puck cut in half, drilled down the center with a long carriage bolt - place the figure eight looking puck in-between the two pulleys on the teeth and twist the wing nut, works very well and does not harm the teeth. Quick / simple / easy .....
     
  4. tuttebenne

    tuttebenne F1 Rookie

    Mar 26, 2003
    3,218
    Bay Shore, NY
    Full Name:
    Andy
    #4 tuttebenne, Feb 15, 2015
    Cam blockers come standard on all 308s with A/C. Once you remove the compressor from its mount you use the rubber shock inserts. Put one on top of the cam and one on the bottom and run a bolt through them. If you don't have A/C then use some of the previously suggested solutions or find some A/C compressor mounts.

    PS: Hey Waymar, nice post count (308)!!!
     
  5. Basal Skull

    Basal Skull Formula Junior

    Oct 26, 2010
    427
    Vancouver BC
    #5 Basal Skull, Feb 15, 2015
    I don't think you really need them, they'll turn a little but as long as you have them marked well, shouldn't be a problem.
     
  6. mike996

    mike996 F1 Veteran

    Jun 14, 2008
    6,871
    Full Name:
    Mike 996
    #6 mike996, Feb 15, 2015
    Last edited: Feb 15, 2015
    Concur - mark the pulleys for alignment before removing the belt. The cams may or may not shift slightly as you do the work but just move them back into alignment when you install the new belt.

    OTOH, there's nothing wrong with all the locking/marking of belts that some folks do and if it makes you comfortable to do it, by all means do so. One thing to be aware of either way - locking or not - a new belt may not fit in exactly the same alignment. IOW, if you lock/mark the pulleys and remove the old belt, the new belt may require the cams to be very slightly "adjusted" for the belt to drop into the grooves. The more use the old belt has seen, the more likely will be the need for that adjustment. So if you lock the pulleys, you may have to unlock them anyway and move them for the new belt to fit. We're talking of movement in the range of probably no more than the width of the mark you made, probably less.
     
  7. tuttebenne

    tuttebenne F1 Rookie

    Mar 26, 2003
    3,218
    Bay Shore, NY
    Full Name:
    Andy
    #7 tuttebenne, Feb 15, 2015
    I think it makes good sense to lock the pulleys. Any piston to valve contact should be avoided. One urban legend on many forums is about the failure of sodium filled exhaust valves (in our two valve 308s) magically after 30 years of use. They fail because they crack from piston to valve contact not from age. So just be careful.
     
  8. tbakowsky

    tbakowsky F1 World Champ
    Consultant Professional Ferrari Technician

    Sep 18, 2002
    19,948
    The Cold North
    Full Name:
    Tom
    #8 tbakowsky, Feb 15, 2015
    Really?
     
  9. msouza

    msouza Formula Junior

    Mar 14, 2005
    292
    Tennessee
    Full Name:
    Milton Souza
    #9 msouza, Feb 15, 2015
  10. fin59shaw

    fin59shaw Rookie

    Jan 18, 2009
    38
    Sedalia, Missouri
    Full Name:
    Rusty
    #10 fin59shaw, Feb 15, 2015
    I really appreciate the information from everyone. I think I will do it naturally, unless it looks like a problem is happening. I do appreciate knowing a part number / vendor to go to if I run into a problem. I've done belt changes on DOHC engines before, I just feel a little nervous about a Ferrari engine. I have all the parts for the major service, including the brakes, so it should be a good project. There's nothing wrong with the 308, except that it's been a long time between service, so I'm anxious to get it done. I've had it for about three years, and only driven it about 1000 miles, and nothing in the last two. Kind of sad, but I've had a lot of other things going on. It is a nice one, though, and yellow.
     

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