To service and repair the Timing Chain, one should start with the removal of the engine front cover and Crankshaft position sensor reluctor ring. To rotate the engine, it is necessary to put a 7/16-20 x 1 inch bolt on the end of the Crankshaft that its tip is pointing up by not using the crank shaft balancer bolt (CRANK SHAFT BALANCE) nor a bolt longer than 1 inch to avoid stripping of the bolt head. Turn the Crankshaft so that the marking on the rear sprocket align with the marking on the front sprocket and cylinder number four is at top dead center (TDC) of the compression stroke. Next, you should undo the camshaft sprocket bolts, then camshaft sprocket and camshaft Timing Chain. Remove Crankshaft sprocket and Crankshaft balancer key with the help of the Crankshaft gear remover (J 5825-A). Clean and inspect the Timing Chain and sprocket before installation. Place the Crankshaft balancer key into the keyway of the Crankshaft, ensuring the latter is almost parallel or slightly inclined. Key the keyway of the Crankshaft sprocket with the balancer key on the Crankshaft and then use the pinion bearing race installer - rear (J 5590) to install the Crankshaft sprocket. Rotate the Crankshaft so its sprocket alignment mark is placed at the 12 o'clock, and fill in the camshaft sprocket with its alignment mark positioned on the 6 o'clock and ensure the correct alignment on both sprockets. Use the camshaft sprocket bolts, and fix them with 25 nm, (18 ft, lbs). Finally put on Crankshaft position sensor reluctor ring and line up key component of the ring with the Crankshaft balancer key, use a hammer to fit it onto the Crankshaft until it sits against the Crankshaft sprocket, remove bolt from the end of the Crankshaft, and replace the engine front cover.