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. Ensure that the camshaft gear (2) is aligned with the camshaft timing chain marks (1) in the twelve O'clock position.
- 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. The crankshaft gear mark (1) should align with the timing chain mark (2) at the six O'clock position.
- 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 (2) and tighten the bolts (3) to the proper specification. Refer to TORQUE SPECIFICATIONS .
- Install a plastic tie strap (1) around the timing chain to hold tension on the timing chain.
- Install a new O-ring on the oil pickup tube.
- Install the engine oil pump (1) onto the crankshaft.NOTE:
The engine oil pump drive hub and inner gerotor must be aligned while installing the engine oil pump.
- Ensure that the engine oil pump is flush (2) against the engine block.NOTE:
Do not use the engine oil pump bolts to draw the engine oil pump onto the crankshaft.
- Insert the engine oil pickup tube (3) into the engine oil pump body (1).NOTE:
Be sure the engine oil pickup tube flange is flush with the body of the engine oil pump. The O-ring should not be visible when the engine oil pump tube is fully seated.
- Install the engine oil pickup tube retaining bolt (2) and tighten to the proper specification. Refer to TORQUE SPECIFICATIONS .
- Turn the oil pump counter clockwise to align the oil pump body mounting holes to the engine bolt holes.
- Install the four engine oil pump retaining bolts.
- Using the sequence shown in illustration, tighten the oil pump retaining bolts to 28 N.m (21 ft. lbs.).
- If removed, install the timing chain tensioner and tighten the bolts (1) to the proper specification. Refer to TORQUE SPECIFICATIONS .
- Remove the tensioner pin (special tool #8514, Pins, Tensioner) (2).
- Cut off and discard the timing chain tensioning plastic tie strap.
- 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 the proper specification. Refer to TORQUE SPECIFICATIONS .
- Install the timing chain cover. Refer to COVER(S), ENGINE TIMING, INSTALLATION, 5.7L .
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).