This is a process that is applicable to the 2.0L timing belt (CBPA) alone. You can start by taking off the engine cover, which is then succeeded by the timing belt upper cover containing fasteners. The second step is to remove the ignition coils, PCV valve fasteners and then remove the PCV housing of the cover. Unscrew crankcase hose heat shield that holds fasteners on the turbocharger and remove the shield. Unplug the electrical connectors and harness attached to the cover of the valve. Unscrew the fasteners a couple of turns at a time, beginning at the center and circling in a circular fashion all the way to the ends, until all the bolts are loosened then take out the retaining fasteners and loosen the valve cover of the cylinder head. In the case when the cover is stuck, hammer and block of wood will help to loosen the cover, or a flexible putty knife can be used to open the seal without damaging the sealing surfaces so that it would not leak oil once the cover is replaced. Be sure that the mating surfaces of the cylinder head and cover are clean prior to installation by stripping all of sealant and old gasket material, such as the spark plug tube seal gaskets, and cleaning with brake system cleaner. Check the rubber end plug at the back of the cylinder head and replace it in case of any cracks and damages. In the case of a rubber gasket, it may be reused in the case it is undamaged. Fit the valve cover, and any brackets removed, and screw the fasteners in a circular order to the required torque. Lastly, remove the remaining parts, and restart the engine and verify that there is no leakage of oil.