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.
Intake Manifold Gasket May Leak Coolant or Engine Oil on Buick Roadmaster
Average mileage: 122,183 (83,000–175,550)
11 people reported this problem
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Viewing 1 - 5 of 5 problem details
1992 Buick Roadmaster 83,000 mi, Visitor
At least one evident leak, front of engine, driver's side. No oil mixing with coolant yet.
coolant leaking from rear section of engine. The insulation on the firewall near the heater core is also wet.
1993 Buick Roadmaster 108,000 mi, Visitor
Pressured coolant leak from intake manifold gasket! Expensive, even at Pep Boys!
1992 Buick Roadmaster 175,550 mi, Visitor
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.