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Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 237 (Engine Mechanical - 3.9L) >> Repair Instructions >> Off-Vehicle Repair Instructions >> Intake Manifold Cleaning and Inspection - Lower >> Inspection Procedure

Inspection Procedure

WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of Lower Intake Manifold
    GM1608919Courtesy of GENERAL MOTORS CORP.
  1. Clean the intake manifold gasket mating surfaces (3) using GM P/N 12346139 (Canadian P/N 10953463) or equivalent.
  2. Clean the fuel injector bores (1).
  3. Inspect the lower intake manifold locating pins (2) for damage. Replace as necessary.
  4. Inspect the intake manifold for damage.
    5. IMPORTANT: If replacing the lower intake manifold, make sure to transfer or replace the locating pins as necessary.
  5. Repair or replace the intake manifold as necessary.
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