Chain And Sprockets, Timing: Installation: Installation
This is a Zero-Tolerance engine. Failure to properly align the timing chain to the timing gears will cause severe engine damage. It is imperative that the Timing Marks shown in illustration in the subsequent steps be properly aligned during assembly.
- Install the crankshaft sprocket (1) and position halfway onto the crankshaft.
- While holding the camshaft phaser in hand, position the timing chain on the camshaft phaser and align the timing marks as shown in illustration.
- While holding the camshaft phaser and timing chain in hand, position the timing chain on the crankshaft sprocket and align the timing mark as shown in illustration.
- Align the slot in the camshaft phaser with the dowel on the camshaft and position the camshaft phaser on the camshaft while sliding the crankshaft sprocket into position.
- Install the camshaft phaser retaining bolt (1) finger tight.
- If removed, install the timing chain guide (1) and tighten the bolts (2) to 11 N.m (8 ft. lbs.).
- If removed, install the timing chain tensioner (2) and tighten the bolts (3) to 11 N.m (8 ft. lbs.).
- Remove the tensioner pin (special tool #8514, Pins, Tensioner) (1).
- Verify that the chains are operating smoothly. The chain must be replaced if:
- Any kinks
- Signs of binding
- Damage to the links
- Signs of wear or stretching
- Tighten the camshaft phaser bolt (1) to 98 N.m (72 ft. lbs.).
- Position the oil pump (1) onto the crankshaft and install the oil pump retaining bolts (2) finger tight.
- Using the sequence shown in illustration, tighten the oil pump retaining bolts to 28 N.m (21 ft. lbs.).
- Verify the slide bushings (1) are installed in the timing chain cover.
- Install the timing chain cover. Refer to COVER(S), ENGINE TIMING, INSTALLATION, 5.7L .
- Fill the engine with oil.
- Fill the cooling system. Refer to STANDARD PROCEDURE .
- Connect the negative battery cable.
- Start the engine and check for leaks.
Do not rotate the camshaft more than a few degrees independently of the crankshaft. Valve to piston contact could occur resulting in possible valve damage. If the camshaft need to be rotated more than a few degrees, first move the pistons away from the cylinder heads by rotating the crankshaft counterclockwise to a position 30° before-top-dead-center. Once the camshaft is returned to their top-dead-center position, rotate the crankshaft clockwise to return the crankshaft to top-dead-center.
The timing mark located on the camshaft phaser must be properly centered between the dual marks on the timing chain while at the 12 O'clock position (1). The timing mark located on the crankshaft must be properly aligned with the single mark on the timing chain while at the 6 O'clock position (2).