Chevrolet Silverado / GMC Sierra. 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