Cadillac 14102671 Chain Assembly, Timing

When replacing the timing chain and gears on Oldsmobile 263 Diesel Engines, follow these steps: Remove the front timing chain cover and valve covers. Evenly loosen all rocker arm pivot bolts to create lash between the rocker arms and valves. Remove the crankshaft oil slinger and the camshaft sprocket bolt washer. Remove the timing chain, camshaft, and crankshaft sprockets. If the crankshaft sprocket is tightly fitted on the crankshaft, use an appropriate puller to remove it. To install, reposition the crankshaft sprocket, ensuring the keyway is perfectly aligned. Rotate the crankshaft gear's timing mark to face the center of the camshaft. Mount the timing gear over the camshaft gear and ensure the timing marks align closely between the shaft centers. Rotate the camshaft to align it with the new gear. Install the fuel pump eccentric with the flat side towards the rear. Drive the key in until it bottoms and reinstall the oil slinger. Complete the remaining installation steps in reverse order. Bleed down the valve lifters and check injection timing after completing the process.

Before starting this procedure, carefully review it, as special tools are necessary.

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 timing chain on the sprockets and slide the sprocket and chain assembly onto the shafts with the timing marks aligned, ensuring the balance shaft gears are also aligned before installing the camshaft timing chain sprocket.

1991 and later models employ a timing chain and sprockets.