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Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 13 (Engine Mechanical - 4.6L (3 Of 5)) >> Off-Vehicle Repair Instructions (1 Of 3) >> Engine Block Cleaning and Inspection - Upper >> Cleaning Procedure

Cleaning Procedure

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  1. Remove any old thread sealant and gasket material or sealant.
  2. Clean all the following areas with solvent:
    • Sealing surfaces
    • Cooling passages
    • Oil passages
    • Bearing journals
  3. Clean all threaded and through holes with solvent.
  4. Prior to the application of RTV sealant GM P/N 12378521 (Canadian P/N 88901148) or equivalent to the engine block seal groove clean the groove and mating surfaces of the upper engine block and the mating surface of the lower crankcase with cleaner solvent GM P/N 12378392 or 12346139 (Canadian P/N 88901247).
    5. CAUTION: Refer to SAFETY GLASSES CAUTION in Cautions and Notices.
  5. Dry the upper engine block with compressed air.
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