Symptoms of an intake manifold gasket leak include poor engine performance, engine overheating and coolant leaks. The leak allows additional air to mix with the fuel-air mix, causing the engine to run lean. On vehicles with onboard diagnostics, the leak often causes the check engine light to illuminate.Continue Reading
The air pressure inside the intake manifold is lower than the atmosphere. This vacuum pulls a precision mix of fuel and air into the manifold, which distributes it to the cylinders through valves. The leak affects the air-to-fuel ratio, so the cylinder fills with more air and less fuel than normal. The car idles roughly, misses and sometimes backfires.
The intake manifold also directs the coolant through the engine block. Leaks in the manifold allow coolant to mix with the motor oil or leak from the engine. Motor oil takes on a milky appearance when mixed with water. Brightly colored coolant leaks are often apparent on the ground under the vehicle. As the coolant leaks from the engine, its cooling system becomes less efficient at moderating temperature and the engine overheats.
On vehicles with onboard computers, sensors constantly monitor the performance of the engine. These sensors indicate problems with engine performance to the diagnostic center, which warns the driver by illuminating the check engine light.Learn more about Car Parts & Maintenance
To repair a manifold leak, first examine the engine for other leaks that need repair, remove the manifold, replace the gasket with a new one, and place the manifold back into its original position. Be sure that the manifold is cool before attempting this task.Full Answer >
The proper way to repair an exhaust manifold leak is to use a piece of sheet metal and weld it onto the damaged area. A cracked manifold will continue to grow in size if not repaired properly and promptly.Full Answer >
A leak on an exhaust manifold can be welded, or depending on the severity of the damage, result in having the unit replaced. Small cracks are patchable, but large cracks require more extensive repair.Full Answer >
Fix a power steering pump leak by cleaning the area around the pump, locating the source of the leak, replacing or repairing the damaged component and checking for leaks. The exact process is not the same for all makes and models, but most processes involve this series of steps.Full Answer >