What to know about the Intake Manifold Gaskets:
The intake manifold is aluminum, steel or plastic cover that sits on top of the engine. It is fixed to the top of the engine by an intake manifold gasket (or gaskets) that are made of plastic and rubber. The intake manifold sends the air-fuel mixture in the engine to the corresponding cylinder where it is burned to produce power. The coolant passes through the intake manifold to the cylinder heads to bring down engine temperature. Expansion, contraction, and heat from the engine make the gasket to fail. This will cause coolant passing through the intake manifold to leak. A leaky manifold gasket can also result in air being sucked through the leaky gasket, resulting in a vacuum leak and poor engine performance.
Facts to Note:
When an intake manifold gasket fails, it can leak coolant into the engine and contaminate the engine oil, so in some cases it will be vital to change the oil in conjunction with this service. Vehicles with plastic intake manifolds may have to have the manifold changed due to cracks in the plastic, which cannot be mended.
How to Fix:
Scan the computer in the car for codes.
Check intake manifold for any signs of leakage.
Pressure-test the cooling system.
Take out and change the intake manifold gaskets.
Clear any diagnostic code.
Run engine and test drive vehicle.
Follow the upkeep schedule given by the manufacturer and get the coolant and oil changed on a consistent basis. This will highly improve the life of the engine parts. Since gaskets are made of rubber and plastic, it is unavoidable that they will suddenly wear out and leak. When you notice a red, green or yellow fluid on the ground beneath your car, get the car checked for leaks.