Chevrolet 1988 Light Duty Truck Repair Manual page 483

ENGINE SPECIFICATIONS (CONT.)
All specifications are in INCHES unless otherwise noted.
CRANKSHAFT:
Main
Taper
Journal
Out of
Round
Main
Bearing
Clearance
Crankshaft End Play
Taper
Crankpin
Out
Round
Rod Bearing
Clearance Service Limit
Rod Side Clearance
CAMSHAFT:
Lobe
Lift ± 0.002
Journal Diameter
Camshaft Runout
Camshaft End Play
VALVE SYSTEM:
Lifter
Rocker Arm Ratio
Valve Lash
Face Angle (Intake & Exhaust)
Seat Angle (Intake & Exhaust)
Seat Runout (Intake & Exhaust
Seat Width
Production
Stem
Clearance
Service
Free Length
Valve Pressure
Spring lbs. @ in.
(Outer) Installed Height
Valve
Spring
Approx. # of Coils
Damper
SPECIFICATIONS
Diameter
Production
Service Limit
Production
Service Limit
Production
Service Limit
Diameter
Production
Service Limit
Production
Service Limit
Production
Intake
Exhaust
Intake
Exhaust
Intake
Exhaust
Intake
Exhaust
Intake
Exhaust
Closed
Open
± V "
3 2
Free Length
4.8 LITER L6 6A4-33
All
2.2979 2.2994
0.0002 (Maximum)
0.001 (Maximum)
0.0002 (Maximum)
0.001 (Maximum)
#1-#6: 0.0010-0.0024
#7: 0.0016-0.0035
#1-#6: 0.0010-0.0025
#7: 0.0015-0.0035
0.002-0.006
2.099-2.100
0.0005 (Maximum)
0.001 (Maximum)
0.0005 (Maximum)
0.001 (Maximum)
0.0010-0.0026
0.0030 (Maximum)
0.006-0.017
0.2315
0.2315
1.8677-1.8697
0.020 (Maximum)
0.003-0.008
Hydraulic
1.75:1
One Turn Down From Zero Lash
46°
0.002 (Maximum)
0.035-0.060
0.062-0.093
0.0010-0.0027
0.0015-0.0032
High Limit Production + 0.001
High Limit Production +0.002
2.08
78-86 lbs. @ 1.66"
170-180 lbs. @ 1.26"
1 2 1 / 3 2
1.94
4
B-07898