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