GMC T Series 1994 Repair Manual page 504

ENGINE SPECIFICATIONS (7 .4 L) (CONT.)
All Specifications are in INCHES unless otherwise noted.
DISPLACEMENT:
CRANKSHAFT:
Diameter
Taper
Main
Journal
Out Of
Round
Production
Main
Bearing
Clearance
Service Limit
Crankshaft End Play
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
Pressure
Valve
lbs. @ in.
Spring
Installed Height ± 1/32"
Valve Spring Fit In Damper
SPECIFICATIONS
#1, #2, #3, #4, #5
Production
Service Limit
Production
Service Limit
#1, #2, #3, #4
#5
#1, #2, #3, #4
#5
Diameter
Production
Service Limit
Production
Service Limit
Production
Service Limit
Intake
Exhaust
Intake
Exhaust
Intake
Exhaust
Intake
Exhaust
Intake
Exhaust
Closed
Open
7.4L
2,7482-2.7489
0.0004 (Maximum)
0.001 (Maximum)
0.0004 (Maximum)
0.001 (Maximum)
0.0017-0.0030
0.0025-0.0038
0.0010-0.0030
0.0025-0.0040
0.005-0.011
2.1990-2.1996
0.0005
0.001
0.0005
0.001
0.0011-0.0029
0.003 (Maximum)
0.0013-0.023
0.2343
0.2530
1.9482-1.9492
Hydraulic
1.70:1
Net Lash
45°
46°
0.002 (Maximum)
1/32-1/16
1/16-3/32
0.0010-0.0027
0.0012-0.0029
High Limit Production +0.001
High Limit Production +0.002
2.12
74-86 lbs. @ 1.80-in.
195-215 lbs. @ 1.40-in.
1 51/64 (1.80 in.)
0.065-0.116 Interference
T2371