If you are replacing the sprockets on a non-free-wheeling 3.5L engine, do not rotate the
Camshaft or
Crankshaft while the
Timing Belt is removed, as the camshaft sprockets are keyed and not meant for adjustment because the
Camshaft Position Sensor pick-up is in place. Start with placing the appropriate sprocket on the camshaft and securing it with a new bolt of size 213 mm (8 3/8 in.), making sure the sprocket doesn't move by gripping it with a 36 mm (1 7/16 in.) box end wrench and finish by tightening the bolt to full torque (102 Nm) plus rotating it a full 90° turn. After that, put in the left camshaft sprocket by using a fresh 255 mm (10 in.) bolt and ensuring the timing mark is unmoving while you tighten the sprocket with the wrench. After you have installed both sprockets, tighten the upper radiator mounting bolts to 12 Nm (106 in. lbs.), put the grill closure panels in place and operate the timing belt with tensioner into the position proper and lastly place the front belt cover. Once the second battery is inserted, connect the negative cable and set the nut's tightness to 5 Nm (45 in. lbs.), then fill up the cooling system and start the engine until it achieves normal temperature, checking the level in the cooling system. Every time a key powertrain component such as the
Flywheel, valvetrain, camshaft or any crankshaft sensors are upgraded, this Relearn step must be performed.