The intake manifold gasket may develop and external engine oil or coolant leak. In some cases, an internal coolant leak may occur causing coolant to mix with the engine oil. Our technicians tell us that operating the engine with a coolant/oil mix can result in internal engine damage. Replacing the intake manifold gasket should correct these leaks.
Car Problem Reports
Buick Roadmaster Intake Manifold Gaskets May Leak Coolant or Engine Oil
Buick Roadmaster Problem
Average Mileage: 129,275 mi (83,000 mi - 175,550 mi)
Visitor, 1992 Buick Roadmaster, 83,000 mi
At least one evident leak, front of engine, driver's side. No oil mixing with coolant yet.
Visitor, 1992 Buick Roadmaster, 175,550 mi
One morning out of blue smelled coolant car making loud hizzing noise
Shop siad it had a small leak so I just replaced the gaskets.