Problem Description and Possible Solution
On 3.9L V6 and 5.9L V8 engines, the intake manifold gasket may leak and cause increased oil consumption and a spark knock during acceleration; the gasket should be replaced.
Problem DataRepairPal Verified
Average mileage: 108,416 (50,000–143,000)
Engines affected: 3.9L V6, 4.7L V8, 5.2L V8
12 model years affected: 1992
, more1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
20 people reported this problem
Gasket between bottom plate of intake and plenum chamber failed. Engine ran well except for oil comsumption/quart@300 miles. Replaced gasket and problem solved. Sold truck at 203,000 mi with no further problems.