Set the number one piston at Top Dead Center and remove the timing chain cover. Slip the oil slinger off the crankshaft, noting that the cupped side faces away from the engine, and reinstall the vibration damper bolt. Using this bolt, rotate the crankshaft clockwise just enough to take up the slack on one side of the chain. Count the pins on the timing chain; the correct timing chain has 48 pins, and a chain with more pins will cause excessive slack. Establish a reference point on the block, move the slack side of the chain from side to side with your fingers, and measure the movement; the difference between the two measurements is the deflection. If the deflection exceeds 1/2-inch, replace the timing chain and sprockets. Align the sprocket timing marks by installing the timing chain with the sprocket index dots directly opposite each other. Remove the camshaft thrust pin and spring, as well as the sprocket retaining bolt and washer, using a large screwdriver through one of the holes in the sprocket to keep it from turning. Pull the crankshaft sprocket, camshaft sprocket, and timing chain off as an assembly. Ensure the crankshaft key is still pointing up and note the locations of the locating dowel on the camshaft and the corresponding hole in the cam sprocket, ensuring they are aligned properly during installation. Pre-assemble the timing chain, crankshaft sprocket, and camshaft sprocket with the timing marks aligned and facing out, then slip the assembly onto the engine so that a line drawn through the timing marks passes through the centers of the sprockets. Install the camshaft sprocket bolt and tighten it to the torque, then reinstall the thrust pin and spring. To verify the correct installation of the timing chain, turn the crankshaft clockwise until the camshaft sprocket timing mark is at the one o'clock position, positioning the crankshaft sprocket timing mark where the adjacent tooth meshes with the chain at the three o'clock position, ensuring there are 15 chain pins between the sprocket timing marks. New replacement chains and gears no longer require pins to be counted; simply line up the timing marks on the gears dot to dot and install the gears and chain. Install the crankshaft oil slinger on the crankshaft with the cupped side facing out, then install the timing chain cover and vibration damper. Reinstall the remaining parts in the reverse order of removal, run the engine, and check for oil leaks and proper operation.