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Home >> Cadillac >> 2004 >> CTS Base, 3.2 N >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 8 (Engine Mechanical - 5.7L (LS6)) >> Repair Instructions >> Off-Vehicle Repair Instructions >> Oil Pan Installation

Oil Pan Installation

WARNING: This page is about a different variant/trim than selected.
    NOTE: Refer to Fastener Notice in Cautions and Notices.
    IMPORTANT:
    • The alignment of the structural oil pan is critical. The rear bolt hole locations of the oil pan provide mounting points for the transmission housing. To ensure the rigidity of the powertrain and correct transmission alignment, it is important that the rear of the block and the rear of the oil pan are flush or even. The rear of the oil pan must NEVER protrude beyond the engine block and transmission housing plane.
    • DO NOT use the oil pan gasket again.
    • It is not necessary to rivet the NEW gasket to the oil pan.
    Fig 1: View Of Oil Pan Baffle & Bolts
    GM1199311Courtesy of GENERAL MOTORS CORP.
  1. Install the oil pan baffle and bolts.

    Tighten:  Tighten the oil pan baffle bolts to 12 N.m (106 lb in).

    2. Fig 2: View Of Sealant On Engine Front Cover Gasket Tabs
    GM260107Courtesy of GENERAL MOTORS CORP.
  2. Apply a 5 mm (0.2 in) bead of sealant GM P/N 12378190 or equivalent, 20 mm (0.8 in) long to the engine block. Apply the sealant directly onto the tabs of the front cover gasket that protrude into the oil pan surface.

    Refer to Sealers, Adhesives, and Lubricants .

    3. Fig 3: View Of Sealant On Engine Rear Cover Gasket Tabs
    GM63175Courtesy of GENERAL MOTORS CORP.
  3. Apply a 5 mm (0.2 in) bead of sealant GM P/N 12378190 or equivalent, 20 mm (0.8 in) long to the engine block. Apply the sealant directly onto the tabs of the rear cover gasket that protrude into the oil pan surface.

    Refer to Sealers, Adhesives, and Lubricants .

    4. Fig 4: Locating Oil Pan & Gasket
    GM1199309Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Be sure to align the oil gallery passages in the oil pan and engine block properly with the oil pan gasket.
  4. Preassemble the oil pan gasket to the pan.
    1. Install the gasket onto the oil pan.
    2. Install the oil pan bolts to the pan and through the gasket.
  5. Install the oil pan, gasket and bolts to the engine block.
  6. Tighten bolts finger tight. Do not overtighten.
  7. Place a straight edge across the rear of the engine block and the rear of the oil pan at the transmission housing mounting surfaces.
    8. Fig 5: View Of Oil Pan & Rear Of Engine Block Clearances
    GM1199320Courtesy of GENERAL MOTORS CORP.
  8. Align the oil pan until the rear of engine block and rear of oil pan are flush or even.

    Tighten: 

    1. Tighten the oil pan-to-block and oil pan-to-front cover bolts to 25 N.m (18 lb ft).
    2. Tighten the oil pan-to-rear cover bolts to 12 N.m (106 lb in).

  9. Measure the oil pan-to-engine block alignment.
    1. Place a straight edge across the rear of the engine block and rear of oil pan at the transmission housing mounting surfaces.
      2. IMPORTANT: The rear of the oil pan must NEVER protrude beyond the engine block and transmission housing mounting surfaces.
    2. Insert a feeler gage between the straight edge and the oil pan transmission housing mounting surface and check to make sure that there is no more than a 0.25 mm (0.01 in) gap between the pan and straight edge.
    3. If the oil pan alignment is not within specifications, remove the oil pan and repeat the above procedure.
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