B350 1 Ton Van V8-5.9L VIN Z (1992)
Intake Manifold: Service and Repair
Cleaning and Inspection
Clean manifold in solvent and blow dry with compressed air.
Inspect manifold for cracks.
Inspect mating surfaces of manifold for flatness with a straightedge.
Inspect exhaust crossover passages through manifold. If passages are coated with hard, black carbon, they should be scraped clean and sandblasted to
remove the carbon deposits.