Before removing the timing chain, loosen the negative cable at the battery and drain the cooling system. After that, detach the upper
Intake Manifold, cylinder head covers,
Crankshaft vibration damper, and timing chain cover. Remember that the crankshaft has to be turned during timing mark alignment to prevent damage to the valves and
Pistons. Locate the crankshaft sprocket's timing mark with the mark on the oil pump housing, which is 60° ATDC in my #1 cylinder. In case the timing chain is taken out when the cylinder heads are fitted, do not rotate either
Camshaft or crankshaft until the appropriate crankshaft position is located to prevent problems with the valves and pistons. Take out the
Timing Chain Tensioner cap and tensioner at the front, right part of the engine, then take out and remove the
Camshaft Position Sensor from the corner of the left cylinder head. Get rid of the timing chain guide access plugs from the cylinder heads. You should realize that the camshafts will rotate in a clockwise manner when their bolts are removed from the camshaft sprocket. First, change the full camshaft sprocket, then remove any bolts attaching it to the camshaft damper and remove both. Now, use a 7/16" wrench to remove both attaching bolts from the left side camshaft sprocket and the sprocket itself. Loosen the lower chain guide and tensioner arm, and the primary timing chain should be able to be removed afterward. The method for removing the crankshaft sprocket is described in the proper resource.