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Water Pump and Balance Shaft Chain and Tensioner Installation

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    Fig 1: Upper Balance Shaft Drive Chain Guide
    GM2146295Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Refer to Fastener Caution .

    NOTE:

    If the balance shafts are not properly timed to the engine, the engine may vibrate and make noise.

  1. Install the upper balance shaft chain guide (1) and bolts and tighten to 12 N.m (106 lb in).
    2. Fig 2: Small Balance Shaft Chain Guide
    GM2146294Courtesy of GENERAL MOTORS COMPANY
  2. Install the small balance shaft chain guide (1).
  3. Install the balance shaft chain guide bolts and tighten to 12 N.m (106 lb in).
    4. Fig 3: Adjustable Balance Shaft Drive Chain Guide
    GM2146293Courtesy of GENERAL MOTORS COMPANY
  4. Install the adjustable balance shaft drive chain guide (1).
  5. Install the adjustable balance shaft drive chain guide bolts and tighten to 10 N.m (89 lb in).
    6. Fig 4: Timing Chain Tensioner
    GM2146380Courtesy of GENERAL MOTORS COMPANY
  6. Reset the timing chain tensioner (1) by performing the following steps:
    1. Turn the tensioner plunger 90 degrees in its bore and compress the plunger.
    2. Turn the tensioner back to the original 12 o'clock position and insert a paper clip through the hole in the plunger body and into the hole in the tensioner plunger.
  7. Install the timing chain tensioner.
  8. Install the chain tensioner bolts and tighten to 10 N.m (89 lb in).
  9. Remove the paper clip from the balance shaft drive chain tensioner.
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