Buick Roadmaster Problem Report
Buick Roadmaster Highter Than Nornal Idle Due to Vacuum Leak
The throttle body gasket may develop a vacuum leak which may result in a higher than normal engine idle. Failed gaskets will require replacement.
The intake manifold gasket may develop and external engine oil or coolant leak. In some cases,...
replaced water pump gaskets now the coolant poring out of it
Coolant is leaking up on passenger side floor board. I had heater core replaced about 2 years...