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Help, 355 tensioner adjustment

Discussion in 'Technical Q&A' started by Rich, Feb 25, 2006.

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  1. Rich

    Rich Rookie

    Nov 4, 2003
    24
    Central Pennsylvania
    Full Name:
    Rich
    #1 Rich, Feb 25, 2006
    When I removed my old timing belts, the small rods in the tensioners fully extended. They don't seem to retract at all. Is it okay to tension the new belts by just using the eccentric movement of the tensioner bearing and then tighten the nut to lock them in that position? Once the nut is tightened down, does the tensioner spring move to constantly readjust tension? I'm not sure how the tensioner works. Thanks for any help.
     
  2. tbakowsky

    tbakowsky F1 World Champ
    Consultant Professional Ferrari Technician

    Sep 18, 2002
    19,952
    The Cold North
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    Tom
    #2 tbakowsky, Feb 25, 2006
    I don't mean to be rude or anything..but please stop what you are doing, and purchase a workshop manual for your car. If you already have one..grab yourself a cup of coffee and sit down and read through the entire section devoted to timing the engine and installing the timing belts, before proceding anyfurther.

    There is a tool you need to set the belt tention correctly. Those tensioners play an extremly impotant roll in belt tension, and must be set up correctly or engine damage will indeed occur.
     
  3. Rich

    Rich Rookie

    Nov 4, 2003
    24
    Central Pennsylvania
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    Rich
    #3 Rich, Feb 25, 2006
    Problem solved. No more need for help. Thanks.
     
  4. tbakowsky

    tbakowsky F1 World Champ
    Consultant Professional Ferrari Technician

    Sep 18, 2002
    19,952
    The Cold North
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    Tom
    #4 tbakowsky, Feb 25, 2006
    excellent!!
     
  5. dersark_painclinic

    dersark_painclinic Formula Junior

    Mar 8, 2005
    981
    Glendale, CA
    Full Name:
    Lazik Der Sarkissian
    #5 dersark_painclinic, Feb 25, 2006
    Hello Rich.

    I have 1999 maranello 550 and thinking to change the timing belt, I think I should have the same style tensioner. Would you discribe step by step changing the tensioner and adjusting. I would greatly appreciat.
    L. Der Sarkissian
     
  6. ferrarifixer

    ferrarifixer F1 Veteran
    BANNED

    Jul 22, 2003
    8,520
    Melbourne
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    Phil Hughes
    #6 ferrarifixer, Feb 25, 2006
    No, 550 has a different tensioner, with mechanical springs only.

    355 and 360 are the same though.
     
  7. dersark_painclinic

    dersark_painclinic Formula Junior

    Mar 8, 2005
    981
    Glendale, CA
    Full Name:
    Lazik Der Sarkissian
    #7 dersark_painclinic, Feb 26, 2006
    Hello Phil.
    Could you explain in detail how to adjust the tensioner on 550, I am taking mechanic course to change the timing belt.

    Thanks.
    L. Der sarkissian
     
  8. ferrarifixer

    ferrarifixer F1 Veteran
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    #8 ferrarifixer, Feb 26, 2006
    It's best to post a page from the shop manual....

    Malcolm is a guru for this, But I have it electronically too, so I'll see what I can do, not today though.
     
  9. dersark_painclinic

    dersark_painclinic Formula Junior

    Mar 8, 2005
    981
    Glendale, CA
    Full Name:
    Lazik Der Sarkissian
    #9 dersark_painclinic, Feb 26, 2006
    Hello again.

    Good bless you.

    L. Der Sarkissian
     
  10. Ricambi America

    Ricambi America F1 World Champ
    Sponsor Owner

    Dec 7, 2003
    16,451
    Winston Salem, NC
    #10 Ricambi America, Feb 26, 2006
    Last edited by a moderator: Sep 7, 2017
    With tremendous hesitation, I post the attached document from the 575M service guide. This is NOT from a 550, and I defer to Phil/Brian/Tom to explain any differences between the 550 and 575. (There were, if I recall, some substantial updates to the tensioner system on the 550)

    (Nervously)

    -Daniel
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  11. dersark_painclinic

    dersark_painclinic Formula Junior

    Mar 8, 2005
    981
    Glendale, CA
    Full Name:
    Lazik Der Sarkissian
    #11 dersark_painclinic, Feb 27, 2006
    Hello again,
    I liked very much the diagram and explanation in the service guide, what kind of manual it is, I have a workshop manual which is worth of nothing,
    What is the name of that manual.
    Thanks.
    L. Der Sarkissian
     

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