Page 1921 of 5267
17. Install cylinder head cover (1) (Refer to 9 - ENGINE/CYLINDER HEAD/CYLINDERHEADCOVER(S)-
INSTALLATION).
18. Connect breather tube (3) and lube oil drain tube
(4) to cylinder head cover (2).
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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).
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29. Install the a/c condenser (1).
30. Connect the a/c refrigerant lines to the a/c con-
denser.
31. Install the radiator upper support panel.
32. Install radiator.
33. Connect the transmission quick-connect oil cooler
lines.
34. Raise vehicle.
35. Connect a/c compressor suction/discharge hose
(if equipped).
36. Install the radiator lower hose and clamps.
37. Install the battery negative cables to the engine
block on the driver and passenger side.
38. Install the transmission adapter with a new cam-
shaft rectangular ring seal. Torque to 77 Nꞏm (57
ft. lb).
39. Install the flywheel and adapter or flexplate.
Torque to 137 Nꞏm (101 ft. lb).
NOTE: If the engine is equipped with a flexplate or
crankshaft adapter, a new clamp ring must be
used. If the engine has a flywheel with washers,
the washers can be reused.
40. Install the starter motor (2). Torque to 43 Nꞏm (32
ft. lb). (Refer to 8 - ELECTRICAL/STARTING/
STARTER MOTOR - INSTALLATION).
41. Connect engine to vehicle harness connectors.
42. Install transmission and transfer case (if
equipped).
43. Connect the exhaust pipe to the turbocharger
elbow.
44. Connect the transmission auxiliary oil cooler lines
(if equipped).
45. Lower the vehicle.
46. Connect the heater core supply and return hoses.
Page 1924 of 5267
47. Install the cooling fan (3) and fan drive (2). (Refer
to 7 - COOLING/ENGINE/RADIATOR FAN -
INSTALLATION).
48. Install the fan shroud mounting bracket (3) and
shroud. (Refer to 7 - COOLING/ENGINE/RADIA-
TOR FAN - INSTALLATION).
49. Install the windshield washer bottle.
50. Install the upper radiator hose and clamps.
51. Raise vehicle.
52. Change oil filter and install new engine oil.
53. Fill the cooling system with coolant. (Refer to 7 -
COOLING - STANDARD PROCEDURE).
54. Connect grid heater harness at grid heater relays.
55. Connect electrical connections to rear of alterna-
tor.
56. Start the engine and inspect for engine oil, cool-
ant, and fuel leaks.
SPECIFICATIONS
SPECIFICATIONS - 5.9L DIESEL
GENERAL DESCRIPTION
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DESCRIPTION SPECIFICATION
Engine Type In-Line 6 Cyl. Turbo Diesel
Displacement 5.9 Liters
359 ( Cubic Inches)
Bore 102.0 mm (4.02 in.)
Stroke 120.0 mm (4.72 in.)
Compression Ratio 17.2:1
325 H.P
Cylinder Pressure (Minimum) 350 psi.
Horsepower High Output 48 RE A/T and NV 5600 or G
56 M/T325 HP @ 2900 RPM
Torque Rating High Output ( 48RE A/T and NV 5600 or
G56M/T)610 LB-FT @ 1400 RPM
Lubrication System Pressure Feed-Full Flow With Bypass Valve
Firing Order 1-5-3-6-2-4
Cylinder Block Cast Iron
Crankshaft Induction Hardened Forged Steel
Cylinder Head Cast Iron With Valve Seat Inserts
Combustion Chambers High Swirl Bowl
Camshaft Chilled Ductile Iron
Pistons Cast Aluminum
Connnecting Rods Cross Rolled Micro Alloy
PISTONS
DESCRIPTION SPECIFICATION
Metric Standard
Skirt Diameter 101.775 - 101.793 mm 4.007 - 4.008 in.
Ring Groove Clearance
Intermediate (Min) 0.045 mm .0018 in
(Max) 0.095 mm 0.0037 in.
Oil Control ( Min) 0.040 mm .0016 in.
(Max) 0.085 mm .0033 in.
PISTON PINS
DESCRIPTION SPECIFICATION
Metric Standard
Pin Diameter ( Min) 39.990 mm 1.5744 in.
(Max) 40.003 mm 1.5749 in.
Bore Diameter (Min) 40.006 mm 1.5750 in.
(Max) 40.012 1.5753 in.
PISTON RINGS
Page 1926 of 5267

DESCRIPTION SPECIFICATION
Metric Standard
Ring Gap
Top Ring 0.26 - 0.36mm 0.010 - 0.014 in.
Intermediate 0.85 - 1.15 mm 0.033 - 0.045in.
Oil Control 0.25 - 0.55 mm 0.010 - 0.21 in.
CONNECTING RODS
DESCRIPTION SPECIFICATION
Metric Standard
Pin Bore Diameter (Min. w/ bushing
installed)40.019 mm 1.5764 in.
Pin Bore Diameter (Max. w/ bushing
installed)40.042 mm 1.5765 in.
Side Clearance (Min) 0.100 mm 0.004 in.
Side Clearance (Max) 0.330 mm 0.013 in.
CYLINDER HEAD
DESCRIPTION SPECIFICATION
Overall Flatness End To End (max) 0.305 mm (0.012 in.)
Overall Flatness Side To Side (Max) 0.076 mm (0.003 in.)
Intake Valve Seat Angle 30°
Exhaust Valve Seat Angle 45°
Va l v e S t e m D i a m e t e r
(Min) 6.96 mm (0.2740 in.)
(Max) 7.01 mm (0.2760 in.)
Valve Rim Thickness (Min.) 0.79 mm (0.031 in.)
OIL PRESSURE
SPECIFICATION SPECIFICATION
At Idle 69 kPa (10 psi)
@ 2500 rpm 207 kPa (30 psi)
Regulating Valve Opening Pressure 517 kPa (75 psi)
Oil Filter Bypass Pressure Setting 344.75 kPa (50 psi)
TORQUE
TORQUE CHART 5.9L DIESEL ENGINE
Page 1927 of 5267

DESCRIPTION Nꞏm In. Lbs. Ft. Lbs.
Connecting Rod—Bolts
Step 1 30 — 22
Step 2 60 — 44
Step 3 Rotate 60 degrees
Crankshaft Main Cap—Bolts
Step 1 50 37
Step 2 80 59
Step 3 Rotate 90°
Cylinder Head—Bolts
Step 1 70 — 52
Step 2 Back off 360 degrees
Step 3 105 — 77
Step 4 Verify 105 — 77
Step 5 Rotate All Bolts 1/4 Turn
Cylinder Head Cover Bolts 24 — 18
Breather Cover Bolts 24 — 18
HPC Nut 50 — 37
Flexplate to Engine 137 — 101
Flywheel to Engine ( NV 5600 ) 137 — 101
Flywheel/Crankshaft Adapter 137 — 101
G 56 Dual Mass Flywheel
Fuel Delivery Lines—Banjo 24 — 18
Fuel Drain Line—Banjo 24 — 18
Fuel line—rail to cylinder head 30 — 22
Fuel line—pump to fuel rail 37 — 27
Injector fuel line brace 24 — 18
#6 Fuel Line Brace Nut at Lift Bracket Stud 24 — 18
Fuel rail holddown bolt 24 — 18
Oil Pan—Bolts 28 — 21
Oil Pan—Drain Plug 50 — 37
Oil Pressure Regulator—Plug 80 — 59
Oil Pressure Switch 18 — 13
Oil Pump—Bolts
Step1 8 — 6
Step2 24 — 18
Oil Suction Tube (Flange)—Bolts 24 — 18
Oil Suction Tube (Brace)—Bolt 43 — 32
Rocker Arm/Pedestal—Bolts 36 — 27
Page 1928 of 5267
SPECIAL TOOLS
5.9L DIESEL ENGINE
Universal Driver Handle - C4171
Crankshaft Barring Tool - 7471 - B
Crankshaft Front Oil Seal Installer - 8281
Valve Spring Compressor - 8319A
Test Plug - 8442
Adapter - 8462
Engine Support Fixture - 8534
TAPPET INSTALLATION TOOL - 8502
STEEL BRACKET - 8534-A