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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) >> Engine Valley Cover Installation

Engine Valley Cover Installation

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    IMPORTANT: All gasket surfaces should be free of oil or other foreign material during assembly.
  1. Install NEW knock sensor oil seals (520) into the valley cover (555).

    Lubricate the seal surfaces with clean engine oil.

    2. Fig 1: View Of Knock Sensor Oil Seals & Valley Cover
    GM1277106Courtesy of GENERAL MOTORS CORP.
  2. Install the valley cover and NEW gasket.
    3. NOTE: Refer to Fastener Notice in Cautions and Notices.
  3. Install the valley cover bolts.

    Tighten:  Tighten the valley cover bolts to 25 N.m (18 lb ft).

    4. Fig 2: View Of Engine Valley Cover, Gasket & Bolts
    GM65048Courtesy of GENERAL MOTORS CORP.
  4. Install the knock sensors.

    Tighten:  Tighten the knock sensors to 20 N.m (15 lb ft).

    5. Fig 3: View Of Knock Sensors
    GM309864Courtesy of GENERAL MOTORS CORP.
  5. Install the knock sensor wire harness.
    6. Fig 4: View Of Knock Sensor Wire Harness
    GM309859Courtesy of GENERAL MOTORS CORP.
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