You need to remove the intake manifold and the ignition coils, remove the fuel injector, the heated oxygen sensor (HO2S), and the engine coolant temperature (ECT) sensor from the camshaft cover, then remove the camshaft cover ground wire bolt from the cover, remove the ground wire from cover, the camshaft cover bolts, the camshaft cover from the cylinder head, the seals from the camshaft cover, finally clean and inspect the cylinder head sealing surface.