Timing Belt Mysteries: Tight all the time?

Discussion in 'General Motoring' started by Kirk, Jan 20, 2007.

  1. Kirk

    Kirk Guest

    This is too weird. Replaced timing belt right. Tensioner measured within
    tolerance. A week later I got up early in the morning and went back to
    check for water pump leaks because I still smelled radiator fluid (no leaks
    after all) and when I took off the top timing belt cover, the belt was
    REALLY slack in the "V" to the water pump....... It seemed to be just
    HANGING. I could easily move it 3 or 4 mm with out any effort.

    Went ahead and rotated the crank to line up the upper timing marks to see if
    anything had slipped, and to get the part number from the belt. As soon as
    I did, it got tight and now, no matter now I rotate it, it is tight! After
    letting it sit out in the cold for about 20 minutes it is a little less
    tight on the portion that goes down from the front cam sproket to the idler
    and crank pullies.

    WHAT GIVES? Is that normal? If it sits out in the cold overnight does it
    loosen or something? V6 2.7 Santa Fe 2003. Engine part number is correct.

    I had replaced the timing belt, hydraulic tensioner, and water pump. The
    belt is in the correct direction.

    Kirk, Jan 20, 2007
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  2. Kirk

    Hyundaitech Guest

    As the car sits, pressure on the hydraulic tensioner may cause it to
    gradually compress. Depending on the position of the camshafts, they
    may attempt to rotate in a particular direction and cause the slack to
    be in just about any segment of the belt. 3-4 mm isn’t a big deal.
    Cranking the engine will put all the slack back on the belt segment
    where the tensioner is and cause the tensioner to reextend
    Hyundaitech, Jan 25, 2007
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