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Oil Pump Installation

WARNING: This page is about a different car, the 2002 Oldsmobile Aurora and 2001 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
  1. Align the crankshaft sprocket splines with the oil pump gerotor and install the sprocket in the oil pump.
    Fig 1: Installing Sprocket In Oil Pump
    G01815415Courtesy of GENERAL MOTORS CORP.
  2. Place the pump and sprocket assembly in position by rotating the crankshaft sprocket until the machined slot (2) is indexed with the drive pin (1) in the crankshaft.
    Fig 2: Placing Pump & Sprocket Assembly In Installation Position
    G01815416Courtesy of GENERAL MOTORS CORP.
  3. Slide the pump and sprocket onto the crankshaft until a positive stop is felt, Ensure that the crankshaft sprocket is aligned with the drive pin in the crankshaft.
    Fig 3: Installing Pump & Sprocket
    G01815417Courtesy of GENERAL MOTORS CORP.
  4. When properly installed, the crankshaft sprocket will protrude from the oil pump but the face of the sprocket will be located behind the machined step in the crankshaft as shown.
    5. Fig 4: Identifying Crankshaft Sprocket Proper Installation Position
    G01815418Courtesy of GENERAL MOTORS CORP.
  5. Align the pump body with the mounting holes in the cylinder block.
    CAUTION: Refer to in FASTENER NOTICE .
  6. Install the oil pump bolts.

    Tighten 

    Tighten the oil pump bolts to 25 N.m (18 ft lbs).

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