The intake manifold gasket may develop external engine oil leak. The manifold gasket will need to be replaced to correct this issue.
Car Problem Reports
Buick Regal Intake Manifold Gasket May Leak Engine Oil
Buick Regal Problem
Engines Affected: 3.8L V6, 3.8L V6 Supercharged
Average Mileage: 118,172 mi (99,000 mi - 150,000 mi)
Visitor, 2002 Buick Regal, 3.8L V6 Supercharged, 110,000 mi
had to replace the engine manifold gasket. also replaced some inlet hoses that later leaked again. however the repair shop fixed this for me free of charge. this was a very labor intensive job that was not cheap, i recommend to save on costs check your serpentine belt and supercharger belt because when your engine is torn apart it may be cheaper to replace these then.
lower intake gasket leaking
what would be the replace cost
Visitor, 1996 Buick Regal, 3.8L V6, 118,678 mi
coolant leaking into the intake manifold
Visitor, 2002 Buick Regal, 107,000 mi
Not fixed yet. I was wondering about average cost.
Visitor, 1996 Buick Regal, 3.8L V6, 150,000 mi
Replace manifold gasket
Visitor, 1996 Buick Regal, 3.8L V6, 100,049 mi
Loss of coolant and temp gauge to max.
Visitor, 1999 Buick Regal, 3.8L V6 Supercharged, 110,000 mi
I have oil leaking into my coolant. It will cost an estimated $1k - $1.8k to fix.
Visitor, 1999 Buick Regal, 3.8L V6 Supercharged, 117,000 mi
Visitor, 2003 Buick Regal
lower intake manifold gaskets and upper plenum assembly