- Inspect the intake manifold
for damage.
- Inspect the intake manifold for cracks near the mounting holes.
- Inspect the crankcase ventilation passages for any blockage and
clean as necessary.
- Clean the intake manifold mating surfaces.
- Use a straight edge and a feeler gauge and measure the intake
manifold mounting surface for warpage.
Intake Manifold Maximum Warpage
0.10 mm (0.0039 in)
- If the warpage is greater than the maximum, repair or replace
the intake manifold.