Inspection Procedure
WARNING: This page is about a different car, the 2020 Buick Regal and 2019 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
Inspect the intake manifold for the following conditions:
- Damage to the intake manifold bolt holes (1)
- Damage to the intake manifold cover bolt holes (2)
- Damage, debris or restrictions to the MAP sensor hole (3)
- Damage to the throttle body sealing surface (4)
- Damage, debris or restrictions to the throttle body hole (5)
Inspect the lower intake manifold for the following conditions:
- Damage, debris or restrictions to the (EVAP) (1)
- Gouges or damage to the intake manifold sealing surfaces (2)
- Damage to the intake manifold bolt holes (3)
- Inspect the lower intake manifold sealing surface for warpage.
- Locate a straight edge across the lower intake manifold sealing surface.
- Insert a feeler gauge between the lower intake manifold and the straight edge. An lower intake manifold with warpage in excess of 0.50 mm (0.020 in) must be replaced.
- Repair or replace the intake manifold as necessary.