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Home >> GMC >> 2003 >> Yukon Denali >> Repair and Diagnosis >> External Pages >> Different car >> Section 520 (Engine Mechanical (Repair Instructions -- 3 Of 3) -- 4.8L, 5.3L & 6.0L) >> Repair Instructions (Off-Vehicle - Part 3) >> Oil Pump, Pump Screen and Deflector Installation

Oil Pump, Pump Screen and Deflector Installation

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    IMPORTANT: Inspect the oil pump and engine block oil gallery passages. These surfaces must be clear and free of debris or restrictions.
  1. Align the splined surfaces of the crankshaft sprocket and the oil pump drive gear and install the oil pump.
  2. Install the oil pump onto the crankshaft sprocket until the pump housing contacts the face of the engine block.
    3. NOTE: Refer to Fastener Notice in Cautions and Notices.
  3. Install the oil pump bolts.

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

    4. Fig 1: View Of Oil Pump & Bolt
    GM64281Courtesy of GENERAL MOTORS CORP.
  4. Install the crankshaft oil deflector.
    5. Fig 2: View Of Crankshaft Oil Deflector
    GM260099Courtesy of GENERAL MOTORS CORP.
  5. Lubricate a NEW oil pump screen O-ring seal (406) with clean engine oil.
  6. Install the NEW O-ring seal onto the oil pump screen.
    7. IMPORTANT:
    • Push the oil pump screen tube completely into the oil pump prior to tightening the bolt. Do not allow the bolt to pull the tube into the pump.
    • Align the oil pump screen mounting brackets with the correct crankshaft bearing cap studs.
  7. Install the oil pump screen (407).
  8. Install the oil pump screen bolt (405) and the deflector nuts (404).

    Tighten: 

    1. Tighten the oil pump screen bolt (405) to 12 N.m (106 lb in).
    2. Tighten the crankshaft oil deflector nuts (404) to 25 N.m (18 lb ft).

    9. Fig 3: View Of Oil Pump Screen, Bolt, Nuts, & O-Ring Seal
    GM1277115Courtesy of GENERAL MOTORS CORP.
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