Take the battery cable wire from the terminal that's ground, or negative. Take out all engine cover bolts and slip the cover off its supports. Then disconnect the breath hose from both the
Valve Cover and intake manifold. Take these two parts out: the intake tube and the air filter holder. Carefully move the throttle body away from its intake manifold joint, while staying connected to the coolant hoses. Mark each intake hose with tape before you detach it from the intake manifold, so you can fasten everything back in the right spot during reassembly. Take off these parts: IAC valve, TPS, knock sensor, and their related electrical wires. Unplug the two vacuum lines for the purge solenoid one by one. Lift the front of the car and use jackstands to support it safely. Then take off the under-vehicle splash shield. Detach the bracket under the intake manifold before taking out the whole intake manifold assembly. Pull the intake manifold far away to release its mounting bolts/nuts. When pulled back, disconnect the PCV hose by detaching it from the metal retaining pin and manifold. Unhook the intake manifold from its position in the engine space. First, scrub off all remaining gasket material and get rid of any oil or dirt. Install a new gasket. Begin to put the manifold in its place while tightening the mounting screws in stages, starting from the middle bolts, and slowly work toward the ends of the installation. To reverse installation, repeat the steps we just did for removal. Reconnect the battery. Start the car and observe if oil, coolant, and vacuum leaks appear.