Intake Manifold Gasket Replacement
What is an intake manifold gasket?
For the engine to run, the intake manifold has to be properly sealed to the cylinder head. The intake manifold gasket does this. It may be made of rubber or paper.
How does the intake manifold gasket work?
The intake manifold is a distribution system for air, and sometimes fuel. As the throttle body opens, the engine intake stroke sucks in air through the intake manifold. Cars that don't use direct injection will distribute fuel this way as well, but this system is becoming less common.
Negative pressure, or a vacuum, builds up inside the intake manifold, and the manifold gasket is used to prevent any unwanted air from entering the system.
What are the symptoms related to a bad intake manifold gasket?
Problems with the intake manifold gasket can create the following symptoms:
Illuminated check engine light
Erratic engine performance
Oil and coolant leaks
Poor gas mileage
Stalling
» LEARN MORE: Intake manifold gasket symptoms
Can I drive with a intake manifold gasket problem?
A problem with the intake manifold gasket can make life hard on the engine. It's often best to have the car towed to a repair shop in this situation to avoid further damage.
How often do intake manifold gaskets need to be replaced?
There's no set schedule to replace the intake manifold gasket. It's designed to last the life of the vehicle, but often it will be replaced when doing related engine repairs in order to prevent problems with it down the road.
How are intake manifold gasket issues diagnosed?
If the above symptoms are present, the technician can test the intake manifold gasket by connecting a smoke machine to the manifold with the engine off. The pressure will push smoke out of any leaking parts, including the intake gasket.
How is a intake manifold gasket replaced?
Typically, the intake manifold will have to be removed to replace the gasket. This can be a large job that may involve draining the engine of coolant and oil and removing many engine components.
Many vehicles, however, are designed with plastic intake manifolds that do not have oil passages or coolant passages, and are much faster and more cost effective to remove and reinstall.
RepairPal recommendations for intake manifold gasket issues
When replacing the intake manifold gasket, the fuel injectors may require removal, and using OEM replacement fuel injector seals is the best option. When working with fuel, the battery should always be disconnected, and proper precautions should be taken against fire and inhalation hazards.
Can I replace the intake manifold gasket myself?
No, this job should be left to a professional technician.