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.
Average mileage: 123,051 (90,000–150,000)
Engines affected: 4.7L V8, 5.2L V8, 5.9L V8
14 people reported this problem
Plenum intake gasket leaking. Was consuming a quart of oil every 500 miles. I added a liquid gasket sealer to the oil and now am only using a quart every 2000 miles. But it's only a matter of time before it will require a replacement gasket costing approximately $1200, mostly labor. Research shows this is a common problem due to an aluminum plenum contracting and expanding at a different rate than the engine block due to dissimilar metals. Bad design.
Saw the tail pipe smoking white transparent smoke, checked oil two quarts low, gallon of anti freeze ..SLT 4x4 4 door Durango 4.7 v8