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Home >> GMC >> 1991 >> Value Van 7.4 N >> Repair and Diagnosis >> External Pages >> Different car >> Section 87 (3.0L V6 - VIN [3]) >> Removal & Installation >> Intake Manifold >> Inspection

Intake Manifold: Inspection

WARNING: This page is about a different car, the 1995 Plymouth Voyager, 1995 Plymouth Grand Voyager, 1995 Dodge Grand Caravan, and 1995 Dodge Caravan. However, it is still accessible from the selected car via links, so may be relevant.

Inspect for clogged coolant passages in end crossovers. Check intake manifold mounting surfaces for warpage. Ensure warpage does not exceed specification. See INTAKE MANIFOLD WARPAGE  table.

INTAKE MANIFOLD WARPAGE

Application In. (mm)
Cylinder Head Mounting Surface
Standard .003 (.08)
Maximum .005 (.13)
Upper Air Intake Mounting Surface
Standard .004 (.10)
Maximum .008 (.20)