Before the removal of the intake manifold it is required that you pull the cable off the negative terminal of the battery and also lose the fuel system pressure. Subsequently, exclude the air filter housing outlet duct and label, then, disconnect all engine wiring harnesses which affect the intake manifold extraction, by releasing all the harness clip lock, and bundle all strands away from the operation area. Remove the hose connected to the canister purge solenoid if it is already connected, the fuel line connected to the fuel rail and the PCV hose connected to the intake manifold. Then, remove all other electrical connectors or vacuum hoses which are connected to the intake manifold or throttle body. Ease the intake manifold mounting bolts by a quarter turn, and depending on the engine model, they should be easily removable, be very careful not to use any tools to pry between the manifold and the heads as this may cause damage the gasket sealing surfaces. By pulling it over the heads, then unbending any still connected as the intake manifold is lifted off the engine. For Valve Lifter Oil Manifold (VLOM) removal, other components that must be detached include the fuel pump insulator, the fuel rail and injectors, and the balance shaft sprocket; the VLOM assembly mounting bolts are then removed and the gasket, in case it is still serviceable, should be saved. On mating, the places where the cylinder heads, block and the manifold sit should be absolutely clean: rid of all gasket debris by gentle scraping off at most. Wipe the ribs of the new gasket and place it over the cylinder block, if the VLOM has been removed, replace it and fasten the bolts to the recommended torque. Place the new gaskets in the appropriate position on the intake manifold so that they fit into place and cover the intake port holes; then, with equal care, position and fit the manifold in the space provided. Screw in the bolts and fasten them according to the sequence and torque value but with great care to avoid tightness that will lead to gasket leakage. Last of it, the rest of the installation if done in the reverse manner to removal and once the engine has been started, look out for vacuum leaks at the joints of the intake manifold.
