Automobile engines work using a vacuum, or lack of air, to push and process fuel. Intake manifolds contain a smaller vacuum that directs fuel into the engine. The intake manifold has a gasket that can be prone to leakage. Leaky intake manifold gaskets can reduce vehicle performance and cause noise.
A vehicle with an intake gasket leak may show a decrease in coolant levels. Puddles of coolant may form underneath a vehicle with a gasket leak, depending on the severity of the leak. Coolant levels should be checked often to evaluate any leakage.
Intake manifolds use a vacuum to move fuel into the engine. If a leaky gasket is present, the introduction of air into the manifold can cause a whistling or sucking sound. This noise can be soft or loud, depending on the type of leak.
A leaky intake manifold gasket disrupts the introduction of fuel into the engine. It also adds air to the engine mixture which can lessen engine performance. Cars suffering from a leaky gasket may experience a rougher idle or stalling in severe cases. Misfiring cylinders and slow acceleration are also common symptoms of leaky manifold gaskets.