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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 26 (Engine Mechanical - 2.7L (L3B) - Repair Instructions - Ct4 (5 Of 6)) >> Lower Crankcase Extension Overhaul (RWD) >> Inspection Procedure

Inspection Procedure

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Fig 1: Identifying Engine Block Lower Structural Extension Inspection Areas (RWD)
GM5131168Courtesy of GENERAL MOTORS COMPANY
  1. Inspect the engine block lower structural extension for the following conditions:
    • Damage to the engine block lower structural extension upper mounting holes (1)
    • Damage to the engine block lower structural extension sealing surface. (2)
    • Damage to the mounting bosses (3)
    • Gouges or damage to the engine block lower structural extension sealing surfaces (4)
    • Damage to the engine oil cooler seal area. (5)
    • Damage to the positive crankcase ventilation tube. (6)
    • Damage to the balancer shaft bearing surfaces. (7)
    • Damage to the oil pan matting surface. (8)
    • Damage to the oil filter adapter gasket surface. (9)
    • Damage to the engine block lower structural extension lower mounting holes (10)
  2. Repair or replace the engine block lower structural extension as necessary.