GM 14087014
Timing Chain

As the first step in Timing Chain service and repair install the Crankshaft key that you may have removed into its keyway position. Then gently tap the key forward until both ends rest on the Crankshaft. Begin by putting the Crankshaft sprocket in front of the Crankshaft while making sure the Crankshaft key centers with the Crankshaft sprocket keyway. Put the Crankshaft balancer and sprocket installer (J41665) to work installing the Crankshaft sprocket until it rests completely against the Crankshaft flange. Schedule the Crankshaft sprocket rotation until its alignment mark reaches the twelve o'clock position while confirming the camshaft locating pin remains in position across the camshaft alignment hole and sprocket teeth integrate correctly with the Timing Chain. Position the camshaft sprocket alignment mark at the 6 o'clock orientation during alignment between camshaft and Crankshaft sprocket. Set the camshaft sprocket together with the Timing Chain in place and exercise the Crankshaft or camshaft sprockets to match the timing marks. Before finishing installation you should screw in the camshaft sprocket bolts then torque them to 35 nm (26 ft. Lbs.).

Rotate the crankshaft until the timing marks on both sprockets align and the number four cylinder is at Top Dead Center (TDC) of the compression stroke.

Use the Crankshaft Gear Remover (J 5825-A) to remove the crankshaft sprocket and then remove the crankshaft balancer key.

Align the keyway on the crankshaft position sensor reluctor ring with the woodruff key in the crankshaft, and install the reluctor ring onto the crankshaft until it is completely seated against the crankshaft sprocket.

Install the camshaft sprocket and the timing chain, ensuring the camshaft sprocket alignment mark is in the 6 o'clock position.

Use the Crankshaft Gear Installer (J 5825-A) to remove the crankshaft sprocket.