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timing belt retensioning

Discussion in '456/550/575' started by drabe, Mar 13, 2011.

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  1. drabe

    drabe Karting

    May 29, 2010
    143
    #1 drabe, Mar 13, 2011
    Does a new timing belt need to be retensioned after 1000 miles or so?
     
  2. tazandjan

    tazandjan Three Time F1 World Champ
    Lifetime Rossa Owner

    Jul 19, 2008
    39,166
    Clarksville, Tennessee
    Full Name:
    Terry H Phillips
    #2 tazandjan, Mar 13, 2011
    Abe- Nope. The tensioner takes care of it.

    Taz
    Terry Phillips
     
  3. deanhalter

    deanhalter Formula Junior

    Dec 27, 2008
    357
    Norco, CA
    Full Name:
    Dean Halter
    #3 deanhalter, Mar 13, 2011
    Last edited by a moderator: Sep 7, 2017
    What car? 456, 550 have tensioners that are locked in position at a tension set by the mechanic.

    WSM specifically warns against any retensioning of the belts once the intial tension is applied and the tensioner is set and torqued.

    I have excerpted the WSM pages here that are relevant from the 456 manual:
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  4. tazandjan

    tazandjan Three Time F1 World Champ
    Lifetime Rossa Owner

    Jul 19, 2008
    39,166
    Clarksville, Tennessee
    Full Name:
    Terry H Phillips
    #4 tazandjan, Mar 13, 2011
    Dean- It is the same for all the V12s in this forum.

    Taz
    Terry Phillips
     
  5. dersark_painclinic

    dersark_painclinic Formula Junior

    Mar 8, 2005
    981
    Glendale, CA
    Full Name:
    Lazik Der Sarkissian
    #5 dersark_painclinic, Mar 13, 2011
    550 WSM recommend to re check it, but not retension it
     
  6. tazandjan

    tazandjan Three Time F1 World Champ
    Lifetime Rossa Owner

    Jul 19, 2008
    39,166
    Clarksville, Tennessee
    Full Name:
    Terry H Phillips
    #6 tazandjan, Mar 14, 2011
    Last edited by a moderator: Sep 7, 2017
    Abe- In keeping with my policy of always letting everyone know when I am full of crap, the maintenance schedule on our V12s (456-575) does say to check and adjust the belt tension when the car was new at an interval varying from 1200-1500 miles on the 456 to 5000 miles on the Maranellos. Nothing after that in the schedule.

    This begs the question from a pro like Brian of whether new belts should be retensioned after 1200- 5000 miles? Beats me. Have never heard of anybody doing it.

    Taz
    Terry Phillips
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  7. drabe

    drabe Karting

    May 29, 2010
    143
    #7 drabe, Mar 14, 2011
    Thanks all. Very helpful.
     

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