GMC T Series 1994 Repair Manual page 404

ENGINE SPECIFICATIONS (4.3L) (CONT.)
All Specifications are in INCHES unless otherwise noted.
DISPLACEMENT:
CRANKSHAFT:
Diameter
■
Main
Journal
Taper
Out Of
Round
Production
Main
Bearing
Clearance
Service
Limit
Crankshaft End Play
Crankshaft Runout
Taper
Crankpin
Out Of
Round
Rod Bearing
Clearance
Rod Side Clearance
CAMSHAFT:
Lobe
Lift ± 0.002
Journal Diameter
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 ± 1/32"
Valve Spring
Damper
SPECIFICATIONS
#1
#2, #3
#4
Production
Service Limit
Production
Service Limit
#1
#2, #3
#4
#1
#2, #3
#4
Diameter
Production
Service Limit
Production
Service Limit
Production
Service Limit
Intake
Exhaust
Intake
Exhaust
Intake
Exhaust
Intake
Exhaust
Intake
Exhaust
Closed
Open
Free Length
Approx # of Coils
4.3L (LB4, VIN Z)
2.4484-2.4493
2.4481-2.4490
2.4479-2.4488
0.0002 (Maximum)
0.001 (Maximum)
0.0002 (Maximum)
0.001 (Maximum)
0.0008-0.0020
0.0011-0.0023
0.0017-0.0032
0.0010-0.0015
.0010-0.0025
0.0025-0.0035
0.002-0.006
0.001 (Maximum)
2.2487-2.2497
0.0005
0.001 (Maximum)
0.0005
0.001 (Maximum)
0.0013-0.0035
0.0030
0.006-0.014
0.234
0.257
1.8682-1.8692
0.004-0.012
Hydraulic
1.50:1
1 3/4 Turn Down from Zero Lash
45°
46°
0.002 (Maximum)
0.035-0.060
0.062-0.093
0.0010-0.0027
0.0010-0.0027
High Limit Production +0.001
High Limit Production +0.002
2.03
76-84 lbs. @ 1.70-in.
194-206 lbs. @ 1.25-in.
1.690-1.710
1.86
4