Chevrolet Silverado / GMC Sierra. Manual — part 1
2008 ENGINE
Engine Mechanical - 4.3L - Sierra & Silverado
SPECIFICATIONS
FASTENER TIGHTENING SPECIFICATIONS
Application
Specification
Metric
English
Accelerator Control Cable Bracket Nut to Stud
12 N.m
106 lb in
Accelerator Control Cable Bracket Nut to Throttle
Body
9 N.m
80 lb in
Accelerator Control Cable Bracket Stud to Intake
Manifold
6 N.m
53 lb in
Accelerator Control Cable Bracket Stud to Throttle
Body
12 N.m
106 lb in
Air Cleaner Adapter Stud
8 N.m
71 lb in
Balance Shaft Driven Gear Bolt
First Pass
20 N.m
15 lb ft
Final Pass
35 degrees
Balance Shaft Retainer Bolt
12 N.m
106 lb in
Battery Cable Bracket Bolt to Oil Pan
12 N.m
106 lb in
Battery Negative Cable Bolt to Engine
25 N.m
18 lb ft
Battery Positive Cable Junction Block Bracket Bolt
25 N.m
18 lb ft
Belt Idler Pulley Bolt
50 N.m
37 lb ft
Camshaft Retainer Bolt
12 N.m
106 lb in
Camshaft Sensor Bolt
N.m
lb ft
Camshaft Sprocket Bolt
25 N.m
18 lb ft
Connecting Rod Bolt
First Pass
20 N.m
15 lb ft
Final Pass
100 degrees
Crankshaft Balancer Bolt
95 N.m
70 lb ft
Crankshaft Bearing Cap Bolt - Preferred Method
First Pass
20 N.m
15 lb ft
Final Pass
73 degrees
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado
Crankshaft Bearing Cap Bolt
105 N.m
77 lb ft
Crankshaft Position Sensor Bolt
9 N.m
80 lb in
Crankshaft Pulley Bolt
58 N.m
43 lb ft
Crankshaft Rear Oil Seal Housing Bolt and Nut
12 N.m
106 lb in
Crankshaft Rear Oil Seal Housing Retainer Stud
6 N.m
53 lb in
Crossmember Bolt
100 N.m
74 lb ft
Cylinder Head Bolt - Preferred Method
All Bolts First Pass in Sequence
30 N.m
22 lb ft
Long Bolts Final Pass in Sequence
75 degrees
Medium Bolts Final Pass in Sequence
65 degrees
Short Bolts Final Pass in Sequence
55 degrees
Cylinder Head Core Hole Plug
20 N.m
15 lb ft
Distributor Cap Bolt
2.4 N.m
21 lb in
Distributor Clamp Bolt
25 N.m
18 lb ft
Drive Belt Idler Pulley Bolt
50 N.m
37 lb ft
Drive Belt Tensioner Bolt
50 N.m
37 lb ft
Engine Block Left Side Oil Gallery Plug
20 N.m
15 lb ft
Engine Block Left Rear Oil Gallery Plug
30 N.m
22 lb ft
Engine Block Right Rear Oil Gallery Plug
20 N.m
15 lb ft
Engine Block Coolant Drain Hole Plug
20 N.m
15 lb ft
Engine Block Oil Gallery Plug
20 N.m
15 lb ft
Engine Coolant Heater Bolt/Screw
2 N.m
18 lb in
Engine Coolant Temperature (ECT) Sensor
20 N.m
15 lb ft
Engine Flywheel Bolt
100 N.m
74 lb ft
Engine Front Cover Bolt
12 N.m
106 lb in
Engine Lift Front Bracket Stud
35 N.m
26 lb ft
Engine Mount Bolt to Engine Bracket
50 N.m
37 lb ft
Engine Mount Engine Bracket Bolt to Engine
50 N.m
37 lb ft
Engine Mount Frame Bracket Through-bolt
75 N.m
55 lb ft
Engine Mount Frame Side Mount Bolt
65 N.m
50 lb ft
Engine Oil Level Sensor
13 N.m
115 lb in
Engine Oil Pressure Gage Sensor
30 N.m
22 lb ft
Engine Oil Pressure Gage Sensor Fitting - Plus
Required Angle
15 N.m
11 lb ft
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado
Engine Shield Bolt
20 N.m
15 lb ft
Engine Wiring Harness Bracket Bolt to Battery
Positive Cable Junction Block Bracket
9 N.m
80 lb in
Engine Wiring Harness Bracket Bolt to Generator
and Drive Belt Tensioner Bracket
25 N.m
18 lb ft
Engine Wiring Harness Bracket Nut to Evaporative
Emission (EVAP) Canister Purge Solenoid Valve
Stud
9 N.m
80 lb in
Engine Wiring Harness Bracket Nut to Intake
Manifold Stud
12 N.m
106 lb in
Engine Wiring Harness Bracket Stud
25 N.m
18 lb ft
Engine Wiring Harness Clip Bolt
9 N.m
80 lb in
Engine Wiring Harness Ground Nut
16 N.m
12 lb ft
Evaporative Emission (EVAP) Canister Purge
Solenoid Valve Stud to Intake Manifold
10 N.m
89 lb in
Exhaust Manifold Bolt/Stud
First Pass
15 N.m
11 lb ft
Final Pass
30 N.m
22 lb ft
Exhaust Manifold Heat Shield Bolt
9 N.m
80 lb in
Fan and Water Pump Pulley Bolt
25 N.m
18 lb ft
Frame Cross Bar Bolt
100 N.m
74 lb ft
Fuel Meter Body Bracket Bolt
10 N.m
89 lb in
Fuel Pipe Bracket Bolt
6 N.m
53 lb in
Fuel Pipe Retainer Nut
3 N.m
27 lb in
Fuel Supply Pipe Nut - Fuel Tank Side
30 N.m
22 lb ft
Generator and Drive Belt Tensioner Bracket Bolt to
Engine
41 N.m
30 lb ft
Generator and Drive Belt Tensioner Bracket Stud to
Engine
20 N.m
15 lb ft
Generator and Drive Belt Tensioner Bracket Stud
Nut
41 N.m
30 lb ft
Ground Wire Bolt to Rear of Left Side Cylinder
Head
16 N.m
12 lb ft
Ground Wire Nut to Rear of Right Side Cylinder
Head
16 N.m
12 lb ft
Heater Hose Bracket Bolt to Generator and Drive
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado
Belt Tensioner Bracket
25 N.m
18 lb ft
Hood Hinge Bolt
25 N.m
18 lb ft
Ignition Coil Stud
12 N.m
106 lb in
Junction Block Bracket Bolt
25 N.m
18 lb ft
Knock Sensor
25 N.m
18 lb ft
Lift Bracket Bolts
15 N.m
11 lb ft
Lower Intake Manifold Bolt
First Pass in Sequence
3 N.m
27 lb in
Second Pass in Sequence
12 N.m
106 lb in
Final Pass in Sequence
15 N.m
11 lb ft
Oil Cooler Pipe Bracket to Oil Pan Bolt
12 N.m
106 lb in
Oil Filter
30 N.m
22 lb ft
Oil Filter Adapter
55 N.m
41 lb ft
Oil Filter Fitting
55 N.m
41 lb ft
Oil Level Indicator Tube Bolt
12 N.m
106 lb in
Oil Pan Baffle Bolt
12 N.m
106 lb in
Oil Pan Bolt and Nut
25 N.m
18 lb ft
Oil Pan Drain Plug
25 N.m
18 lb ft
Oil Pan Skid Plate Bolt
20 N.m
15 lb ft
Oil Pump Bolt to Rear Crankshaft Bearing Cap
90 N.m
66 lb ft
Oil Pump Cover Bolt
12 N.m
106 lb in
Positive Battery Cable Clip Bolt
9 N.m
80 lb in
Positive Cable Generator Nut
18 N.m
13 lb ft
Power Steering Pump Bracket Bolt to Engine
41 N.m
30 lb ft
Power Steering Pump Bracket Stud to Engine
20 N.m
15 lb ft
Power Steering Pump Bracket Stud Nut
41 N.m
30 lb ft
Power Steering Pump Bolt
50 N.m
37 lb ft
Power Steering Pump Nut to Engine - Rear Bracket
to Engine
41 N.m
30 lb ft
Power Steering Pump Rear Bracket Nut
50 N.m
37 lb ft
Secondary Air Injection (AIR) Check Valve Pipe
Bracket Bolt to Exhaust Manifold
10 N.m
89 lb in
Secondary Air Injection (AIR) Check Valve Pipe
Stud Nut
25 N.m
18 lb ft
Spark Plug
15 N.m
11 lb ft
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado
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