Remove the timing chain cover and temporarily install the harmonic balancer bolt and washer on the crankshaft. Turn the crankshaft to align the sprocket timing marks, then remove the harmonic bolt and washer without altering the sprocket positions, using a sharp tap on the wrench handle if necessary. Next, remove the front crankshaft oil slinger and the camshaft sprocket bolts, followed by the
Oil Pan. Use two large screwdrivers to carefully pry the camshaft sprocket and then the crankshaft sprocket forward alternately until the camshaft sprocket is free, then remove both the camshaft sprocket and chain, working the crankshaft sprocket off the crankshaft. If the chain is not stretched and parts are to be reused, clean the timing chain, sprockets, and crankshaft oil slinger thoroughly in the appropriate solvent. If the engine was not rotated while the chain and sprockets were off, install them with the timing marks perfectly aligned as they were upon removal. If the engine was rotated, temporarily install the sprockets and turn the crankshaft until the number one piston is at Top Dead Center, ensuring the camshaft 'O' mark is straight down and aligned with both shafts. Remove the sprockets and assemble the timing chain on both sprockets, sliding the chain assembly onto the shafts with the 'O' marks together and aligned with the sprocket hubs. Assemble the oil slinger on the crankshaft with the concave side facing the front of the engine, then install the camshaft sprocket bolts and torque-tighten to specifications. Finally, install the oil pan using a new gasket and then the timing chain cover.