changeing cambelt, mysterious part found | FerrariChat

changeing cambelt, mysterious part found

Discussion in '348/355' started by mac100, Mar 1, 2011.

This site may earn a commission from merchant affiliate links, including eBay, Amazon, Skimlinks, and others.

  1. mac100

    mac100 Rookie

    Mar 1, 2011
    2
    #1 mac100, Mar 1, 2011
    Last edited by a moderator: Sep 7, 2017
    F 348 GTS: to change the cambelt I removed the cover of the cambelt and suddenly I found two little parts on the floor of my garage.
    I dont know the Place they are mounted.
    See the picture I attached (I put a lighter next to it so you can better estimate the size of the part)
    Pls help me...
    Image Unavailable, Please Login
     
  2. X11OUD

    X11OUD Formula Junior

    Mar 22, 2008
    729
    Manchester, England
    Full Name:
    Neil
    I saw the pic before reading the full explanation lol I thought you'd found a lighter in there!

    Sorry but I don't know exactly what it is but it looks like a belt tensioner.
     
  3. Ricambi America

    Ricambi America F1 World Champ
    Sponsor Owner

    That is the guide shoe that is supposed to be mounted at the top of the belt path on both banks (there are two guide shoes) to keep the belt from having too much vertical slop.

    It is Ferrari part # 133824.

    Pap, and the others have pictures of it mounted.

    It is threaded into the timing belt shield. I'm going to guess you have the black plastic shields, and they cracked during your removal attempt, allowing this thing to fall off.
     
  4. PAP 348

    PAP 348 Ten Time F1 World Champ
    Lifetime Rossa Owner

    Dec 10, 2005
    100,220
    Mount Isa, Australia
    Full Name:
    Pap
    #4 PAP 348, Mar 1, 2011
    Last edited by a moderator: Sep 7, 2017
  5. mac100

    mac100 Rookie

    Mar 1, 2011
    2
    Thanks a lot...
    You are fast like your cars here in this forum...
     
  6. PAP 348

    PAP 348 Ten Time F1 World Champ
    Lifetime Rossa Owner

    Dec 10, 2005
    100,220
    Mount Isa, Australia
    Full Name:
    Pap
    No worries mate, hope it all goes well back together and welcome to the Forum :)
     
  7. ferrari 512 tr

    ferrari 512 tr F1 Rookie

    Nov 16, 2008
    4,180
    Australia
    Full Name:
    Paolo
    Papster is a legend
     
  8. RGigante

    RGigante F1 Rookie
    Owner Project Master

    Nov 1, 2006
    2,874
    Portugal
    Keep those parts, I believe they are NLA ....
     
  9. troy_wood

    troy_wood Formula 3

    Apr 28, 2007
    1,457
    Nova Scotia, Canada
    Full Name:
    Troy Wood
    I dunno about that. The face of the shoe shows no wear/slap. Makes me wonder if it was ever mounted and just sitting inside the cover somewhere.
     
  10. 2NA

    2NA F1 World Champ
    Consultant Owner Professional Ferrari Technician

    Dec 29, 2006
    18,221
    Twin Cities
    Full Name:
    Tim Keseluk
    They shouldn't really have any wear on them. They are positioned close to the belt but there's no reason for them to press against it.
     
  11. AceMaster

    AceMaster Three Time F1 World Champ

    Feb 6, 2009
    34,776
    Ontario, Canada
    Full Name:
    Mike
    How critical a role to these play as far as the cambelt is concerned?
     
  12. PAP 348

    PAP 348 Ten Time F1 World Champ
    Lifetime Rossa Owner

    Dec 10, 2005
    100,220
    Mount Isa, Australia
    Full Name:
    Pap
    Interesting debate that. :D:D

    Mine actually had some wear marks on it and WAS mounted/fitted the wrong way. :D:D

    I used some carboard (folded up matchbox) to space it off the belt a little when I set it. :D:D

    I dont think it is supposed to ride on the belt, but has to have a close tolerance to prevent the belt from "jumping" off the cam gear. :):)
     
  13. troy_wood

    troy_wood Formula 3

    Apr 28, 2007
    1,457
    Nova Scotia, Canada
    Full Name:
    Troy Wood
    I've always seen them with wear marks as well, mine included. When I reinstalled mine I set them at a 3/32" gap.
     
  14. ernie

    ernie Two Time F1 World Champ
    Lifetime Rossa Owner

    Nov 19, 2001
    22,614
    The Brickyard
    Full Name:
    The Bad Guy
    In line with what Troy said, the cam belt followers should NOT touch the cam belt. The follower is there to help prevent the belt from jumping off the pulley in the event of belt slap.
     
  15. dapper

    dapper Formula Junior

    Nov 10, 2003
    711
    Bristol, UK
    Full Name:
    Dave
    I also made sure mine didn't actually make contact with the belt when I re-installed them. Mine had no signs of wear at all but mega low mileage so no suprise.

    Be sure you put these two parts in the correct way around, by referencing the cutaway diagram in the thread above, they will physically fit either way!
     
  16. AceMaster

    AceMaster Three Time F1 World Champ

    Feb 6, 2009
    34,776
    Ontario, Canada
    Full Name:
    Mike
    Such intricate details with these engines...I love it :D
     
  17. Andretti Molletti

    Andretti Molletti Formula Junior

    Sep 19, 2010
    345
    Netherlands
    Full Name:
    Dré
    #17 Andretti Molletti, Mar 2, 2011
    Last edited: Mar 2, 2011
    Just curious. If I use my common sense (oke that isn't much :-D) than I see the cambelt turning clockwise.
    Both the inlet camshaft wheels have only 90 degrees "touch" of the cambelt. So changes ar bigger here that the belt will "jump"a tooth. So fa so good and Ferrari has designed that cambelt follower to avoid the "jump".
    But is the cambelt touches the cambelt followers you expect them to be mounted in the same way! The left one is getting "in" the belt and the right one "out" the belt if touched.(do you call that upstreams and downstreams??)
    Why not reversing the left one for safety and reliability??
     

Share This Page