Page 1773 of 5267
11. Install exhaust pipe to exhaust manifold bolts (2).
12. Lower the vehicle.
NOTE: Do not use air tools on engine lift fixture
(2) special tool # 8984.
13. Remove engine lift fixture (2), special tool # 8984.
14. Connect the fuel supply line (Refer to 14 - FUEL
SYSTEM/FUEL DELIVERY/QUICK CONNECT
FITTING - STANDARD PROCEDURE).
15. Reinstall the power steering pump.
16. Connect the heater hoses.
Page 1792 of 5267

1. Perform the Fuel System Pressure Release proce-
dure (Refer to 14 - FUEL SYSTEM/FUEL DELIV-
ERY - STANDARD PROCEDURE). Disconnect the
fuelsupplyline(Referto14-FUELSYSTEM/
FUEL DELIVERY/QUICK CONNECT FITTING -
STANDARD PROCEDURE).
2. Disconnect the battery negative cable.
3. Drain cooling system (Refer to 7 - COOLING -
STANDARD PROCEDURE).
4. Remove the air cleaner resonator and duct work
(Refer to 9 - ENGINE/AIR INTAKE SYSTEM -
REMOVAL).
5. Remove closed crankcase ventilation system.
6. Disconnect the exhaust at the exhaust manifolds.
7. Disconnect the evaporation control system.
8. Disconnect heater hoses.
9. Remove the power steering pump.
10. Remove cylinder head covers (1), using the
sequence provided, and gaskets (2). (Refer to 9 -
ENGINE/CYLINDER HEAD/CYLINDER HEAD
COVER(S) - REMOVAL) .
11. Remove intake manifold and throttle body as an
assembly. (Refer to 9 - ENGINE/MANIFOLDS/IN-
TAKE MANIFOLD - REMOVAL).
12. Remove rocker arm assemblies and push rods.
Identify to ensure installation in original locations.
(Refer to 9 - ENGINE/CYLINDER HEAD/
ROCKER ARM / ADJUSTER ASSY - REMOVAL).
Page 1796 of 5267

5. Tighten the cylinder head bolts in three steps using
the sequence provided :
Step 1— Snug tighten M12 cylinder head bolts,
in sequence, to 34 Nꞏm (25 ft. lbs.) and M8 bolts
to 20 Nꞏm (15 ft. lbs.) torque.
Step 2— Tighten M12 cylinder head bolts, in
sequence, to 54 Nꞏm (40 ft. lbs.) and verify M8
bolts to 20 Nꞏm (15 ft. lbs.) torque..
Step 3— Turn M12 cylinder head bolts, in
sequence, 90 degrees and tighten M8 bolts to 34
Nꞏm (25 ft. lbs.) torque.
6. Install push rods and rocker arm assemblies in
their original position, using pushrod retaining plate
(1) special tool# 9070. (Refer to 9 - ENGINE/CYL-
INDER HEAD/ROCKER ARM / ADJUSTER ASSY -
INSTALLATION).
7. Install the intake manifold and throttle body assem-
bly (Refer to 9 - ENGINE/MANIFOLDS/INTAKE
MANIFOLD - INSTALLATION).
8. If required, adjust spark plugs to specifications.
Install the plugs.
9. Connect the heater hoses.
10. Install the fuel supply line.
11. Install the power steering pump.
12. Install the drive belt (Refer to 7 - COOLING/AC-
CESSORY DRIVE/DRIVE BELTS -
INSTALLATION).
Page 1892 of 5267
COVER - TIMING
REMOVAL
1. Disconnect the battery negative cable.
2. Remove the engine cover (1).
3. Remove air cleaner assembly.
4. Drain cooling system.
5. Remove accessory drive belt.
6. Remove fan and fan drive assembly (Refer to 7 -
COOLING/ENGINE/FAN DRIVE VISCOUS
CLUTCH - REMOVAL).
7. Remove coolant bottle and washer bottle.
8. Remove fan shroud.
NOTE: It is not necessary to disconnect A/C lines
or discharge freon.
9. Remove A/C compressor and set aside.
10. Remove the generator.
11. Remove upper radiator hose.
12. Disconnect both heater hoses at timing cover.
13. Disconnect lower radiator hose at engine.
14. Remove accessory drive belt tensioner and both
idler pulleys.
15. Remove crankshaft damper (2) (Refer to 9 -
ENGINE/ENGINE BLOCK/VIBRATION DAMPER -
REMOVAL).
NOTE: Do not remove the hoses from the power
steering pump.
16. Remove power steering pump and set aside.
Page 1894 of 5267
INSTALLATION
1. Clean timing chain cover and block surface.
NOTE: Always install a new gasket on timing cover.
2. Verify that the slide bushings (1) are installed in timing cover.
3. Install cover and new gasket. Tighten fasteners to 28 Nꞏm (250 in. lbs.).
NOTE: The large lifting stud is torqued to 55 Nꞏm (40 ft. lbs.).
4. Install the oil pan and pick up tube (Refer to 9 -
ENGINE/LUBRICATION/OIL PAN - INSTALLA-
TION).
5. Install the A/C compressor.
6. Install the generator.
7. Install power steering pump.
8. Install the dipstick support bolt.
9. Install the thermostat housing.
10. Install crankshaft damper (Refer to 9 - ENGINE/
ENGINE BLOCK/VIBRATION DAMPER - INSTAL-
LATION).
11. Install accessory drive belt tensioner assembly
and both idler pulleys.
Page 1908 of 5267

CONDITION POSSIBLE CAUSES CORRECTION
3. Improperly operating vibration
damper3. Inspect/replace vibration damper.
4. Improperly operating electronically
controlled viscous fan drive.4. Inspect/replace fan drive.
5. Worn or damaged generator
bearing.5. Check/replace generator.
6. Flywheel housing misaligned. 6. Check/correct flywheel alignment.
7. Loose or broken power
component.7. Inspect the crankshaft and rods for
damage that causes an unbalance
condition. Repair/replace as required.
8. Worn or unbalanced driveline
components.8. Check/repair driveline components.
EXCESSIVE ENGINE
NOISES1. Drive belt squeal, insufficient
tension or abnormally high loading.1. Check the automatic tensioner and
inspect the drive belt. Make sure water
pump, tensioner pulley, fan hub, generator
and power steering pump turn freely.
2. Intake air or exhaust leaks. 2. Refer to Excessive Exhaust Smoke
(Refer to 9 - ENGINE - DIAGNOSIS AND
TESTING).
3. Excessive valve lash. 3. Adjust valves. Make sure the push rods
are not bent and rocker arms, adjusting
screws, crossheads, are not severely worn.
Replace bent or severely worn components.
4. Turbocharger noise. 4. Check turbocharger impeller and turbine
wheel for housing contact. Repair/replace
as required.
5. Gear train noise. 5. Visually inspect and measure gear
backlash. Replace gears as required.
6. Power function knock. 6. Check/replace rod and main bearings.
DIAGNOSIS AND TESTING -SMOKE DIAGNOSIS CHARTS
The following charts include possible causes and corrections forexcess or abnormalexhaust smoke. Small
amounts of exhaust smoke (at certain times) are to be considered normal fora diesel powered engine.
EXCESSIVE BLACK SMOKE
POSSIBLE CAUSE CORRECTION
Air filter dirty or plugged. Check Filter Minder
at air filter (Refer to 9 - ENGINE/
AIR INTAKE SYSTEM/AIR CLEANER ELEMENT -
REMOVAL).
Air intake system restricted. Check entire air intake system including all hoses and
tubes for restrictions, collapsed parts or damage.
Repair/replace as necessary.
Air Leak in Intake System. Check entire air intake system (Refer to 11 - EXHAUST
SYSTEM/TURBOCHARGER SYSTEM/CHARGE AIR
COOLER AND PLUMBING - DIAGNOSIS AND
TESTING) including all hoses and tubes for cracks,
loose clamps and/or holes in rubber ducts. Also check
intake manifold for loose mounting hardware.
Diagnostic Trouble Codes (DTC’s) active or multiple,
intermittent DTC’s.Refer to Powertrain Diagnostic Procedures Information.
Page 1917 of 5267
34. Remove lower fan shroud bracket (3) from
engine.
35. Remove upper fan shroud brackets from engine.
36. Disconnect engine block heater connector.
37. Disconnect A/C compressor and pressure sensor
electrical connectors.
38. Remove the passenger battery ground cable from
the engine block. Remove the driver side battery
ground cable from the engine block.
39. Remove power steering pump from engine by
removing 3 bolts.
40. Disconnect the ECM power connector.
41. Disconnect the ECM ground wire from the hydro-
form screw.
42. Disconnect the fuel supply and return hoses.
43. Remove the cylinder head cover (1). (Refer to 9 - ENGINE/CYLINDER HEAD/CYLINDER HEAD COVER(S) -
REMOVAL).
44. Disconnect the wire harnesses from the injectors (3).
45. Remove the cylinder head cover carrier gasket (2).
Page 1922 of 5267
19. Connect fuel supply and return hoses.
20. Connect ECM ground to hydroform screw. Con-
nect ECM power connector.
21. Install the power steering pump.
22. Install the damper and speed indicator ring.
Torque to 40 Nꞏm (30 ft. lb) plus 60 degrees.
23. Install lower fan shroud bracket (3). Torque to 24
Nꞏm (18 ft. lb).
24. Install upper fan shroud brackets, but do not
tighten fasteners at this time.
25. Connect the engine block heater connection.
26. Connect the A/C compressor and pressure sensor
connectors
27. Install the charge air cooler (2). Install and tighten
the charge air cooler mounting bolts (1) to 2 Nꞏm
(17 in. lbs).
28. Connect the charge air cooler tubes (4). Torque all
clampsto8Nꞏm(72in.lbs).