Timing Chain & Sprockets - Installation
INSTALLATION
Special Tools:
CAUTION: The magnetic timing wheels (1) must not come in contact with magnets (pickup tools, trays, etc.) or any other strong magnetic field. This will destroy the timing wheels ability to correctly relay camshaft position to the camshaft position sensor.
1. Inspect all sprockets and chain guides. Replace if damaged.
2. If removed, install the right side cam chain guide (1) and tensioner arm (6). Tighten attaching T30 bolts (2) to 12 Nm (106 in. lbs.).
3. If removed, install the RH cam chain tensioner (3) to the engine block with two bolts (4). Tighten the T30 bolts (4) to 12 Nm (106 in. lbs.).
4. Reset the RH cam chain tensioner (3) by pushing back the tensioner piston and installing Tensioner Pin (5).
5. If removed, install the left side cam chain guide (2) and tensioner arm (1). Tighten attaching T30 bolts (4) to 12 Nm (106 in. lbs.).
6. If removed, install the LH cam chain tensioner (5) to the cylinder head with two bolts (6). Tighten the T30 bolts (6) to 12 Nm (106 in. lbs.).
7. Reset the LH cam chain tensioner (5) by lifting the pawl (3), pushing back the piston and installing Tensioner Pin (7) Service and Repair.
8. Verify that the key (3) is installed in the crankshaft.
9. CAUTION: Do not rotate the crankshaft more than a few degrees independently of the camshafts. Piston to valve contact could occur resulting in possible valve damage. If the crankshaft needs to be rotated more than a few degrees, first remove the camshafts Camshaft - Removal .
10. Verify that the number one piston is positioned at TDC by aligning the dimple (2) on the crankshaft with the block/bearing cap junction (1).
11. CAUTION: Do not rotate the camshafts more than a few degrees independently of the crankshaft. Valve to piston contact could occur resulting in possible valve damage. If the camshafts 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 camshafts are returned to their top-dead-center position, rotate the crankshaft clockwise to return the crankshaft to top-dead-center.
12. Verify that the camshafts are set at TDC by positioning the alignment holes (1) vertically.
CAUTION: Always reinstall timing chains so that they maintain the same direction of rotation. Inverting a previously run chain on a previously run sprocket will result in excessive wear to both the chain and sprocket.
13. Place the primary chain onto the crankshaft sprocket (3) so that the arrow (2) is aligned with the plated link (1) on the timing chain.
14. While maintaining this alignment, invert the crankshaft sprocket and timing chain and place the idler sprocket (4) into the timing chain so that the dimple (2) is aligned with the plated link (1) on the timing chain.
15. While maintaining this alignment, lubricate the idler sprocket bushing with clean engine oil and install the sprockets and timing chain on the engine. To verify that the timing is still correct, the timing chain plated link (6) should be located at 12:00 (1) when the dimple (5) on the crankshaft is aligned with the block/bearing cap junction (4).
16. Install the idler sprocket retaining bolt (2) and washer (3). Tighten the T45 bolt (2) to 25 Nm (18 ft. lbs.).
17. Install the primary chain guide (2). Tighten attaching T30 bolt (1) to 12 Nm (106 in. lbs.).
18. Reset the primary chain tensioner (5) by pushing back the tensioner piston and installing Tensioner Pin (3).
19. Install the primary chain tensioner (5) to the engine block with two bolts (4). Tighten the T30 bolts (4) to 12 Nm (106 in. lbs.) and remove the Tensioner Pin (3).
20. Press the LH intake cam phaser onto the intake camshaft. Install and hand tighten the oil control valve (6).
NOTE: The LH and RH cam chains are identical.
CAUTION: Always reinstall timing chains so that they maintain the same direction of rotation. Inverting a previously run chain on a previously run sprocket will result in excessive wear to both the chain and sprocket.
21. Drape the left side cam chain over the LH intake cam phaser and onto the idler sprocket (1) so that the arrow (3) is aligned with the plated link (2) on the cam chain.
22. While maintaining this alignment, route the cam chain around the exhaust and intake cam phasers so that the plated links are aligned with the phaser timing marks (1). Position the left side cam phasers so that the arrows (3) point toward each other and are parallel to the valve cover sealing surface (5). Press the exhaust cam phaser onto the exhaust cam, install and hand tighten the oil control valve (2).
NOTE: Minor rotation of a camshaft (a few degrees) may be required to install the camshaft phaser or phaser lock.
23. Install the LH Camshaft Phaser Lock (4) and tighten the oil control valves (2) and (6) to 150 Nm (110 ft. lbs.).
24. Press the RH exhaust cam phaser onto the exhaust camshaft. Install and hand tighten the oil control valve (7).
CAUTION: Always reinstall timing chains so that they maintain the same direction of rotation. Inverting a previously run chain on a previously run sprocket will result in excessive wear to both the chain and sprocket.
25. Drape the right side cam chain over the RH exhaust cam phaser and onto the idler sprocket (1) so that the dimple (2) is aligned with the plated link (3) on the cam chain.
26. While maintaining this alignment, route the cam chain around the exhaust and intake cam phasers so that the plated links are aligned with the phaser timing marks (1). Position the right side cam phasers so that the arrows (3) point away from each other and the scribe lines (4) are parallel to the valve cover sealing surface (6). Press the intake cam phaser onto the intake cam, install and hand tighten the oil control valve (2).
NOTE: Minor rotation of a camshaft (a few degrees) may be required to install the camshaft phaser or phaser lock.
27. Install the RH Camshaft Phaser Lock (5) and tighten the oil control valves (2) and (7) to 150 Nm (110 ft. lbs.).
NOTE: There are no timing marks on the oil pump gear or chain.
CAUTION: Always reinstall timing chains so that they maintain the same direction of rotation. Inverting a previously run chain on a previously run sprocket will result in excessive wear to both the chain and sprocket.
28. Place the oil pump sprocket (5) into the oil pump chain (6). Place the oil pump chain onto the crankshaft sprocket while aligning the oil pump sprocket with the oil pump shaft. Install the oil pump sprocket T45 retaining bolt (4) and tighten to 25 Nm (18 ft. lbs.).
29. Install the oil pump chain tensioner (1). Insure that the spring (3) is positioned above the dowel pin (2).
30. Install the timing gear splash shield (1). Tighten bolts (2) to 5 Nm (35 in. lbs.).
31. Remove the RH and LH Camshaft Phaser Locks.
32. Remove the Tensioner Pins (1) and (6) from the RH and LH cam chain tensioners.
33. Rotate the crankshaft CW two complete revolutions stopping when the dimple (4) on the crankshaft is aligned the with the block/bearing cap junction (5).
34. While maintaining this alignment, verify that the arrows on the left side cam phasers (2) point toward each other and are parallel to the valve cover sealing surface (3) and that the right side cam phaser arrows (7) point away from each other and the scribe lines (9) are parallel to the valve cover sealing surface (8).
35. There should be 12 chain pins (2) between the exhaust cam phaser triangle marking (1) and the intake cam phaser circle marking (3).
36. If the engine timing is not correct, repeat this procedure.
37. Install the engine timing cover, crankshaft vibration damper, accessory drive belts and oil pan Engine Timing Cover(s) - Installation
38. Install the spark plugs. Tighten to 17.5 Nm (13 ft. lbs.) Spark Plug - Installation.
39. Install the cylinder head covers Cylinder Head Cover(s) - Installation
40. Install the upper intake manifold and air cleaner housing assembly Intake Manifold - Installation
41. Fill the engine crankcase with the proper oil to the correct level Service and Repair
42. Connect the negative battery cable and tighten nut to 5 Nm (45 in. lbs.).
43. Fill the cooling system Service and Repair.
44. Operate the engine until it reaches normal operating temperature. Check cooling system for correct fluid level Service and Repair
NOTE: The Cam/Crank Variation Relearn procedure must be performed using the scan tool anytime there has been a repair/replacement made to a powertrain system, for example: flywheel, valvetrain, camshaft and/or crankshaft sensors or components.