GMC T Series 1994 Repair Manual page 503

All Specifications are in INCHES unless otherwise noted.
GENERAL DATA:
Type
Displacement
RPO
Bore
Stroke
Compression Ratio
Firing Order
Oil Pressure (Minimum)*
CYLINDER BORE:
Diameter
Out Of Production
Round
Service
Production
Taper
Service
PISTON:
Production
Service Limit
PISTON RING:
C
r \
Production
Groove
M
Clearance
P
Service Limit
R
E
s
Production
S
1
\JCL\J
o
Service Limit
N
Production
Groove
0
Clearance
Service Limit
1
Production
1
Gap
Service Limit
PISTON PIN:
Diameter
Production
Clearance
In Piston
Service Lmit
Fit In Rod
' Measure on a "Warm Engine." Pressures will be higher on a cold engine.
SPECIFICATIONS
ENGINE SPECIFICATIONS (7.4L)
Thrust Side
Relief Side
Top
2nd
Top
2nd
V8
7.4L (454 CID)
L19
4.25
4.00
7.9:1
1-8-4-3-6-5-7-2
10 psi @ 600 RPM Minimum; 25 psi @ 2000 RPM
4.2500-4.2507
0.001 (Maximum)
0.002 (Maximum)
0.0005 (Maximum)
0.001 (Maximum)
0.001 (Maximum)
0.0018-0.0030
0.005 (Maximum)
0.0012-0.0029
0.0012-0.0029
Hi Limit Production +0.001
0.010-0.018
0.016-0.024
Hi Limit Production + 0.010
0.0050-0.0065
Hi Limit Production + 0.001
0.010-0.030
Hi Limit Production + 0.010
0.98945-0.98965
0.0002-0.0007
0.001 (Maximum)
0.0031-0.0021 Interference