CVVT is installed starting from 2006 model year, 2006 - 2010 models have two CVVT valves for each intake camshaft and later 2011 & onwards have four CVVT valves, one for each camshaft. Starting with, turn off the cable that connects to the negative terminal of the battery. For the 2006 through the 2010 models of the application, CVVT oil control valves are situated in the valley between two cylinder heads at the timing chain side of the engine. Detach the intake manifold, locate the oil control valve electrical connection, unscrew the mounting bolt fixing the valve then pull out the oil control valve, employing the user guide to replace the O-rings if the oil control valve will be reused. Re-installation is the exact opposite of tearing down, even the mounting bolt is tightened to the recommended torque. Correct positioning of the electrical connectors is important as it affects the engine; the Bank 1 connector is grey, while the Bank 2 is black. On cars manufactured from the beginning of 2011, begin by unscrewing the intake manifold, disconnecting the electrical connectors on the valves and removing the bolts that hold the valves in place and pulling out the CVVT valves out of the cylinder head, in case the CVVT valves are to be reused their O-rings should be replaced. The process of removal is the opposite of installation, which means that the CVVT mounting bolts should be tightened to the identified torque. As for non drive-by exhaust oil control valves, remove the electrical connectors, the valve covers, three bolts of the valve mounting, and the valve itself from the cylinder head, and replace the O-rings if the CVVT valves are to be reused. Installation is the reverse of removal, with one side of O-rings in clean engine oil and the mounting bolts to be tightened to the oil gallery torque.