Chevrolet Silverado / GMC Sierra. Service 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