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Timing Belt Adjustment / Deviation. Why ?? 700 1988

posted by  someone claiming to be lummer57 on  Mon Nov 24 08:28 CST 2008 [RELATED]

1988 740 Wagon. Monday evening my timing belt broke. Replaced it on Tuesday. First time I ever replaced a timing belt. Went well and car is running fine so far. I aligned 3x marks(cam, crank, and auxiliary)correctly. I noticed that on lower outside cover there were some marks/lines and numbers(10 to 30 if I recall). What is this meant for ? To deviate from standard proper timing ?? I aligned crank gear mark to engine extrusion mark as I thought and read was correct way to do it. What would be reason to deviate from that ??? Thanks.








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    Timing Belt Adjustment / Deviation. Why ?? 700 1988

    posted by  rstarkie on  Mon Nov 24 08:36 CST 2008
    Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
    last visit: Fri Oct 24 10:14 CST 2014
    [RELATED]

    Those numbers are for ignition timing which is adjusted on your car by moving the distributor's relationship with the cam; two bolts secure the distributor to the back of the head. Loosening those and moving the distributor will change the time at which the spark is introduced relative to the position of the piston. A timing light (strobe) is used to set the ignition timing. The vibration dampner has a mark on it that is illuminated by the strobe to indicate where the timing is set; those numbers are the scale.

    Congratulations on a successful timing belt replacement.

    Randy








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      Timing Belt Adjustment / Deviation. Why ?? 700 1988

      posted by  someone claiming to be lummer57 on  Tue Nov 25 13:30 CST 2008 [RELATED]

      Thank you very much for your very informative and courteous reply. I appreciate it. Have a great Thanksgiving.







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