Chevrolet Silverado / GMC Sierra. Manual - part 386
Fan Pulley Bracket Bolt
50 N.m
37 lb ft
Flywheel Bolt - Angular Tightening Method
1st Step 79 N.m
1st Step 58 lb ft
2nd Step 60
degrees
2nd Step 60
degrees
3rd Step 60
degrees
3rd Step 60
degrees
Flywheel Housing Bolt
80 N.m
60 lb ft
Flywheel Housing to Upper Oil Pan Bolt
50 N.m
37 lb ft
Front Engine Cover Bolt
25 N.m
18 lb ft
Fuel Filter Bracket Bolt
30 N.m
22 lb ft
Fuel Injection Pipe Nut
41 N.m
30 lb ft
Fuel Injector Bracket Bolt
30 N.m
22 lb ft
Fuel Inlet Pipe Bracket Bolt
21 N.m
15 lb ft
Fuel Injection Pump Assembly to Cylinder Block
Bolt
25 N.m
18 lb ft
Fuel Injection Pump to Bracket Bolt
28 N.m
20 lb ft
Fuel Injection Pump Drive Gear Nut
70 N.m
52 lb ft
Fuel Line Bracket Nut
21 N.m
15 lb ft
Fuel Temperature Sensor
22 N.m
16 lb ft
Fuel Pipes Bracket Bolt
25 N.m
18 lb ft
Fuel Pressure Relief Valve
100 N.m
74 lb ft
Fuel Rail Assembly Bolt
25 N.m
18 lb ft
Fuel Rail Balance Pipe Bolt
21 N.m
15 lb ft
Generator Bracket Bolt and Nut
50 N.m
37 lb ft
Generator Positive Cable Nut
9 N.m
80 lb in
Glow Plug
18 N.m
13 lb ft
Glow Plug Controller Bolt
10 N.m
89 lb in
Glow Plug Harness Bracket Bolt
10 N.m
89 lb in
Glow Plug Nut
2 N.m
18 lb in
Glow Plug Power Feed Nut
15 N.m
11 lb ft
Glow Plug Relay Assembly Bolt
10 N.m
89 lb in
Heater Outlet Pipe Bolt
25 N.m
18 lb ft
Heater Pipe Bolt
25 N.m
18 lb ft
Hood Hinge Bolt
25 N.m
18 lb ft
Idle Pulley Bolt
50 N.m
37 lb ft
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Injector Bracket Bolt
23 N.m
16 lb ft
Intake Manifold Bolts/Nuts
25 N.m
18 lb ft
Oil Cooler Adapter Bolts
25 N.m
18 lb ft
Oil Cooler Adapter Nuts
25 N.m
18 lb ft
Oil Cooler Assembly Bolts
25 N.m
18 lb ft
Oil Cooler Adapter Stud
10 N.m
89 lb in
Oil Drain Plug
84 N.m
62 lb ft
Oil Fill Tube Bolt
25 N.m
18 lb ft
Oil Filter
24 N.m
18 lb ft
Oil Gallery Plugs
53 N.m
39 lb ft
Oil Level Indicator Tube Bolt
21 N.m
15 lb ft
Oil Level Sensor Bolt
10 N.m
89 lb in
Oil Level Sensor Harness Bolt
40 N.m
29 lb ft
Oil Pan Bolts/Nuts - Lower
10 N.m
89 lb in
Oil Pan Bolt - Upper
20 N.m
15 lb ft
Oil Pan Skid Plate Bolt
20 N.m
15 lb ft
Oil Pressure Sensor Unit
49 N.m
36 lb ft
Oil Pressure Relief Valve
39 N.m
29 lb ft
Oil Pump Bolt
21 N.m
15 lb ft
Oil Pump Driven Gear Nut
100 N.m
74 lb ft
Oil Pump Gear Cover Bolt
21 N.m
15 lb ft
Oil Pump Pipe and Screen Assembly Bolts and Nuts
25 N.m
18 lb ft
Piston Cooling Nozzle Eye Bolt
21 N.m
15 lb ft
Positive Cable Junction Block Bracket to Power
Steering Pump Bolt
9 N.m
80 lb in
Positive Crankcase Ventilation Cover Screws
4 N.m
35 lb in
Positive Crankcase Ventilation Oil Separator
Bracket Nut
25 N.m
18 lb ft
Power Steering Pump Bracket Bolt
50 N.m
37 lb ft
Power Steering Pump Bolt
50 N.m
37 lb ft
Rocker Arm Shaft Bracket Bolt
41 N.m
30 lb ft
Starter Motor Bolt
78 N.m
58 lb ft
Transmission Fill Tube Nut
18 N.m
13 lb ft
Thermostat Housing Bolts/Nuts
25 N.m
18 lb ft
Thermostat Cover Bolt
25 N.m
18 lb ft
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
ENGINE MECHANICAL SPECIFICATIONS
Torque Converter Bolt
60 N.m
44 lb ft
Transmission Oil Cooler Clip Nut
9 N.m
80 lb in
Turbocharger Bolt
108 N.m
80 lb ft
Turbocharger Coolant Outlet Pipe Bracket Nut
10 N.m
89 lb in
Turbocharger Heat Shield Bolts
10 N.m
89 lb in
Turbocharger Oil Return Pipe Stud
10 N.m
89 lb in
Turbocharger Oil Supply Hose Eye Bolt
26 N.m
19 lb ft
Turbocharger Oil Return Pipe Bolts/Nuts
25 N.m
18 lb ft
Upper Oil Pan to Flywheel Housing Bolts
20 N.m
15 lb ft
Valve Adjusting Nut
22 N.m
16 lb ft
Valve Lifter Holdown Bracket Bolt
11 N.m
97 lb in
Valve Rocker Arm Cover Bolt - Lower
10 N.m
89 lb in
Valve Rocker Arm Cover Bolt - Upper
8 N.m (Two
Times)
71 lb in (Two
Times)
Water Outlet Bolts
25 N.m
18 lb ft
Water Pump Bolt
25 N.m
18 lb ft
Water Pump Inlet Pipe Bolts
25 N.m
18 lb ft
Application
Specification
Metric
English
General
Engine Type
90 degree V-8
Displacement
6.6 Liter
402 cu in
RPO
LMM
Bore
103 mm
4.0551 in
Stroke
99 mm
3.8976 in
Compression Ratio
16.8:1
Engine Compression Test - Minimum
2069 KPa
300 psi
Idle Speed
680 RPM
Firing Order
1-2-7-8-4-5-6-3
Block
103.11 mm
4.0594 in
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Cylinder Bore Diameter - Service Limits
Cylinder Bore Diameter - Production Value
103.0-103.014 mm 4.0551-4.0557 in
Cylinder Bore Out-of-Round - Production
Value
0.015 mm
0.0006 in
Cylinder Bore Taper - Production Value
0.015 mm
0.0006 in
Camshaft
Camshaft Bearing Inside Diameter - Service
Limit
61.07 mm
2.4043 in
Camshaft Bearing Inside Diameter -
Production Value
61.00-61.03 mm
2.4016-2.4028 in
Camshaft End Play - Service Limit
0.2 mm
0.0079 in
Camshaft Journal Diameter - Service Limit
60.92 mm
2.3984 in
Camshaft Journal Diameter - Production Value 60.932-60.962 mm 2.3990-2.4001 in
Camshaft Lobe Lift - Exhuast - Production
Value
5.907 mm
0.2326 in
Camshaft Lobe Lift - Intake - Production
Value
7.273 mm
0.2863 in
Camshaft Runout - Service Limit
0.05 mm
0.0020 in
Cooling System
Capacity @ Engine RPM
270 L/min @ 3172 RPM
Thermostat Full Open Temperature
110 degrees C
230 degrees F
Turbocharger Coolant Bypass Valve
60 degrees C
140 degrees F
Connecting Rod
Connecting Rod Bearing Clearance - Service
Limit
0.10 mm
0.0039 in
Connecting Rod Bearing Clearance -
Production Value
0.036-0.077 mm
0.0014-0.0030 in
Connecting Rod Bore Diameter - Bearing End
- Production Value
62.958-62.979 mm 2.4789-2.4795 in
Connecting Rod Bore Diameter - Pin End -
Service Limit
34.53 mm
1.3594 in
Connecting Rod Bore Diameter - Pin End -
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado