Chevrolet Silverado / GMC Sierra. Service manual — part 3

SEALERS, ADHESIVES, AND LUBRICANTS

Pin - Piston Pin Diameter

23.545-23.548 mm 0.9270-0.9271 in

Valve System

Valves - Valve Face Angle

45 degrees

Valves - Valve Seat Angle

46 degrees

Valves - Valve Seat Runout

0.05 mm

0.002 in

Valves - Valve Seat Width - Intake

1.016-1.651 mm

0.040-0.065 in

Valves - Valve Seat Width - Exhaust

1.651-2.489 mm

0.065-0.098 in

Valves - Valve Stem Oil Seal Installed Height

1-2 mm

0.03937-0.07874

in

Valves - Valve Stem-to-Guide Clearance -
Intake - Production

0.025-0.069 mm

0.0010-0.0027 in

Valves - Valve Stem-to-Guide Clearance -
Intake - Service

0.025-0.094 mm

0.0010-0.0037 in

Valves - Valve Stem-to-Guide Clearance -
Exhaust - Production

0.025-0.069 mm

0.0010-0.0027 in

Valves - Valve Stem-to-Guide Clearance -
Exhaust - Service

0.025-0.094 mm

0.0010-0.0037 in

Rocker Arms - Valve Rocker Arm Ratio

1.5:1

Valve Springs - Valve Spring Free Length

51.3 mm

2.02 in

Valve Springs - Valve Spring Installed Height
- Intake

42.92-43.43 mm

1.670-1.700 in

Valve Springs - Valve Spring Installed Height
- Exhaust

42.92-43.43 mm

1.670-1.700 in

Valve Springs - Valve Spring Load - Closed

338-374 N @ 43.2

mm

76-84 lb @ 1.70 in

Valve Springs - Valve Spring Load - Open

832-903 N @ 32.3

mm

187-203 lb @ 1.27

in

Application

Type of Material

GM Part Number

United

States

Canada

Balancer Shaft Driven Gear Bolt

Threadlock

12345382

10953489

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado

Camshaft Retainer Bolt

Threadlock

12345382

10953489

Crankshaft Balancer Keyway

Adhesive

12346141

10953433

Cylinder Head Bolt

Sealant

12346004

10953480

Engine Block to the Crankshaft Rear Oil
Seal Housing Junction at the Oil Pan
Sealing Surfaces

Adhesive

12346141

10953433

Engine Block to the Engine Front Cover
Junction at the Oil Pan Sealing Surfaces

Adhesive

12346141

10953433

Engine Block at the Lower Intake
Manifold Sealing Surfaces

Adhesive

12346141

10953433

Engine Block Coolant Drain Hole Plug

Sealant

12346004

10953480

Engine Block Core Hole Plug

Threadlock

12345382

10953489

Engine Block Oil Gallery Plug

Sealant

12346004

10953480

Engine Coolant Temperature (ECT) Gage
Sensor

Sealant

12346004

10953480

Engine Coolant Temperature (ECT)
Sensor

Sealant

12346004

10953480

Engine Oil

SAE 5W-30 Oil

12345610

993193

Engine Oil Pressure Sensor

Sealant

12346004

10953480

Engine Oil Pressure Sensor Fitting

Sealant

12346004

10953480

Engine Oil Supplement

Lubricant

1052367

992367

Evaporative Emission (EVAP) Canister
Purge Solenoid Valve Stud

Threadlock

12345382

10953489

Exhaust Manifold Bolt/Stud

Threadlock

12345493

10953488

Expansion Cup Plug - Balance Shaft Rear
Bearing Hole

Sealant

12346004

10953480

Expansion Cup Plug - Camshaft Rear
Bearing Hole

Sealant

12346004

10953480

Fuel Meter Body Bracket Bolt

Threadlock

12345382

10953489

Fuel Pipe Bolt

Threadlock

12345382

10953489

Lower Intake Manifold Bolt

Threadlock

12345382

10953489

Oil Level Indicator Tube

Sealant

12346004

10953480

Oil Pump Screen Tube

Sealant

12346004

10953480

Throttle Body Stud

Threadlock

12345382

10953489

Upper Intake Manifold Stud

Threadlock

12345382

10953489

Valve Train Component Prelube

Lubricant

12345501

992704

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado

COMPONENT LOCATOR

DISASSEMBLED VIEWS

Fig. 1: Upper and Lower Intake Manifold View
Courtesy of GENERAL MOTORS CORP.

Water Pump Bolt

Sealant

12346004

10953480

Callout

Component Name

1

Throttle Body

2

Throttle Body Stud

3

Idle Air Control Valve Seal

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado

4

Idle Air Control Valve

5

Idle Air Control Valve Bolt

6

O-ring

7

Spacer

8

Fuel Injection Fuel Feed and Return Pipe Retainer Nut

9

Fuel Injection Fuel Feed and Return Pipe Retainer

10

Fuel Injection Fuel Feed and Return Pipe

11

Fuel Service Port Cap

12

Fuel Schrader Valve

13

Engine Wiring Harness Bracket Nut

14

Engine Wiring Harness Bracket

15

Fuel Injection Fuel Feed and Return Pipe Bolt

16

Fuel Injector Fuel Meter Fuel Passage Plug

17

Spacer

18

O-ring

19

Upper Intake Manifold Stud

20

Positive Crankcase Ventilation Valve Cover

21

Positive Crankcase Ventilation Valve Cover Seal

22

Upper Intake Manifold

23

Upper Intake Manifold Gasket

24

Fuel Injector Fuel Meter Body Seal

25

Fuel Injector Fuel Meter Body

26

Lower Intake Manifold

27

Heater Hose Fitting

28

Engine Coolant Thermostat

29

Engine Coolant Thermostat Seal

30

Water Outlet

31

Water Outlet Stud

32

Throttle Body Seal

33

Throttle Position Sensor Bolt

34

Throttle Position Sensor

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado