Torque for 308 timing belt stretchers | FerrariChat
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Torque for 308 timing belt stretchers

Discussion in 'Technical Q&A' started by Martin8, Jul 17, 2008.

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  1. Martin8

    Martin8 Rookie

    Sep 26, 2007
    19
    St. Charles, IL
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    Marty Davis
    #1 Martin8, Jul 17, 2008
    I just replaced the timing belt on my 1982, 308 GTBI but not sure of torque for belt stretchers. I think it is 40 ft/lbs. Is that correct? I greased the inside of the slide area of the belt stretchers with lithium grease. And wiped the outside well but wonder now if maybe that was not the thing to do. It already had some grease in it. Also I have decided to not to reinstall the A/C compressor. It never worked that great anyway and it is a big pain to install. What do you think? Thanks Marty
     
  2. miketuason

    miketuason F1 World Champ
    Owner Silver Subscribed

    Feb 24, 2006
    15,809
    Cerritos, CA.
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    Mike
    #2 miketuason, Jul 17, 2008
    Not sure about the exact torque of the T-belt tension but it should be self set as it is spring loaded.
     
  3. yelcab

    yelcab F1 World Champ
    Consultant

    Nov 29, 2001
    13,560
    San Carlos, CA
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    Mitchell Le
    #3 yelcab, Jul 18, 2008
    And no grease is needed. Once you torque it, it does not move.
     
  4. FasterIsBetter

    FasterIsBetter F1 Veteran

    Jul 22, 2004
    5,855
    NoNJ/Jupiter FL
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    Steve W.
    #4 FasterIsBetter, Jul 18, 2008
    Agree with Mitch and Mike. The tensioner is spring loaded. Once the belt is in place, you release the tensioner, make sure it has pressed against the belt to the extent the spring creates tension (give it a push with your hand and let it find its own spot), and then lock it in place by tightening the nut. There is a torque value for the nut that you must be sure to torque it to, but the tension against the belt is whatever the spring creates before you lock it down. Putting extra tension on it will only stretch the belt and stress the tensioner bearing.
     
  5. FasterIsBetter

    FasterIsBetter F1 Veteran

    Jul 22, 2004
    5,855
    NoNJ/Jupiter FL
    Full Name:
    Steve W.
    #5 FasterIsBetter, Jul 18, 2008
    p.s. DO NOT under any circumstance turn the engine crank without having the tensioner pulley nut tightened down. The spring tenion on the tensioner is not enough to hold the belt on the sprockets and turn the cams. Guess how I found that one out??!! That's a mistake you make only once.
     

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