Cam pulley spot welds | FerrariChat

Cam pulley spot welds

Discussion in '348/355' started by Jamie H, Jan 10, 2010.

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  1. Jamie H

    Jamie H Formula 3
    Owner

    Aug 28, 2009
    2,425
    Puslinch,ON
    Full Name:
    Jamie
    Good evening everyone,

    I am in the process of a major service on my Mondial t and had read somewhere about spot welding the 'guides' on the cam pulleys. I have tried looking for a thread as I am sure that someone has already written about this issue. I checked mine and the only one that is loose at the moment is the intake pulley on bank 1-4. I do intend in spot welding all of them but was looking for a recomendation as to how many welds etc. Could anyone please guide me to the thread that talks about this?

    Thanks
     
  2. FandLcars

    FandLcars F1 Rookie

    Aug 6, 2006
    3,057
    Tempe, Az
    Full Name:
    Rick Schumm
    Jamie - I think Daniel with Ricambi had pulley "fence" failures and posted several times about spot welding his fences with (I believe) 3 TIG spot welds on each fence (120deg apart). I'm sure Daniel would be happy to discuss with you. I think a key precaution is to make sure that timing belt(s) don't ride on these fences after you have installed them. IE, turn the engine over by hand for a time and see where the belts ride. If they ride on the fences, I'd check for reasons why... ie, tensioner bearing play, or other alignment problems. Hope this helps (I also couldn't find a thread).
     
  3. xtcgt

    xtcgt Karting

    Nov 20, 2009
    156
    Toms River NJ
    Full Name:
    Robert Boynton
    just spot weld it. i did all of mine for the "just in case" and did 4-5 welds. doesn't have to be tig, i migged mine and just ground down any excess. do it on the side the belt does not run on. simple easy --hard to screw up.
     
  4. Miltonian

    Miltonian F1 Veteran

    Dec 11, 2002
    5,966
    Milton, Wash.
    Full Name:
    Jeff B.
    This isn't just an issue with the cam gears, of course. There's also a fence on the lower gear that can come loose and destroy the belt.
     
  5. PAP 348

    PAP 348 Ten Time F1 World Champ
    Lifetime Rossa Owner

    Dec 10, 2005
    100,220
    Mount Isa, Australia
    Full Name:
    Pap
    I am going to weld all mine up (if they havent already been done) when I pull the engine out to do my major service. :):)
     
  6. jqpd99

    jqpd99 Formula 3
    Silver Subscribed

    Jul 25, 2007
    2,477
    Ottawa
    Full Name:
    DFO
    Here's how I did mine...

    http://ferrarichat.com/forum/showpost.php?p=137615396&postcount=145

    DF
     
  7. Jamie H

    Jamie H Formula 3
    Owner

    Aug 28, 2009
    2,425
    Puslinch,ON
    Full Name:
    Jamie
    Thanks everyone. I will mig them in place after I get the pulley's off, with pictures of course.
     

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