Begin by removing the negative cable from the battery and also draining the cooling system before we remove and replace the timing chain. Then, take off the left and right cylinder head covers and end with the radiator fan. Turn the engine so that the timing mark on the
Crankshaft damper falls at the TDC mark on the timing chain cover and the "V6" marks on the
Camshaft sprocket are at 12 o'clock, indicating no. 1 exhaust TDC stroke. Eliminate the
Power Steering Pump and get to the chain guide fasteners by opening the left and right cylinder head access plugs. Take away the oil fill housing to access the right side tensioner arm fastener and then remove the crankshaft damper. Collapse the main belt tensioner and make sure the
Oil Pan opening is blocked off to prevent the left secondary chain tensioner plate from falling. Remove both secondary chain tensioners and the
Camshaft Position Sensor, but do not ruin the camshaft drive wheel or bring it near magnets, as this could result in a car that won't start. Allow both camshafts and crankshaft to rotate together when opening the timing, as any strong movement of these parts can cause the valve and pistons to contact each other. Take off the bolts that hold the left and right camshaft sprockets, then grip the left camshaft steel tube with Special Tool 8428 Camshaft Wrench, as you remove the left camshaft sprocket. Then, perform this process again with the right camshaft sprocket. After taking out the idler sprocket assembly bolt, push both the idler sprocket assembly and crank sprocket together so the primary and secondary chains come off. The last step is to take out the tensioner arms for the chain guides, then the chain tensioner.