For models from 2008 and earlier, first remove the battery cable from the negative terminal. Then, remove the air intake duct from the air filter housing. After that, twist the wire boots to unclip the spark plug wires off the spark plugs. For the 2.3L engine, take out the ignition coil assemblies. Remove the throttle cable and cruise control actuator cable from the throttle valve. Then, disconnect the catalytic converter monitor connector and the heated oxygen sensor connector and free the connectors from their bracket. Take off the nuts for the wiring harness support from the valve cover studs and set the wiring aside. On 2001 to 2004 models, the ignition coil and its bracket need to be removed from the valve cover. Also, unscrew the bolts retaining the valve cover. It should now come away with its captive spacer sleeve and rubber seal. Throw away the cover gasket and inspect the sealing faces for wear, replace any worn seals For assembly, clean the faces of the cover and the cylinder head gasket. Next, place a new gasket on the cylinder head in the proper position. Finally, attach the cover to the cylinder head while holding the gasket in position. Using a diagonal/ criss-cross pattern, first hand tight the cover bolts and then tighten to torque. Install the spark plug wires according to numbering for 2004 and earlier models or install the ignition coils for other models. After reconnecting the battery, let the Powertrain Control Module relearn idle plus fuel trim strategy, then run engine to detect oil leaks. For models made from 2009 and afterwards, disconnect the cable from the negative battery terminal, remove ignition coils, disconnect the PCV system vent hose and set aside wiring harnesses. Detach and remove the valve cover mounting bolts, then lift valve cover along with gaskets. Ensure the valve cover and cylinder head sealing surfaces are clean, inspect the gasket for damage, and RTV the timing cover and cylinder head joint. Replace the valve cover in the reverse order of its removal, tightening its bolts in a cross pattern from the middle towards the ends, until specified torque is reached.
