GMC T Series 1994 Repair Manual page 562

All Specifications are in millimeters (mm) unless otherwise noted.
GENERAL DATA:
Displacement
RPO
Type
Bore
Stroke
Compression Ratio
Firing Order
Oil Pressure
CYLINDER BORE:1
Diameter
Out Of Round
Taper (Thrust Side)
PISTON DIAMETER:
Piston to
Bore Clear­ Bohn Pistons
ance
PISTON RING:
Groove Clearance
Compression
Gap2
Groove Clearance
Oil
Gap
PISTON PIN:
Diameter
Clearance (Piston Pin to Piston Bore)
Fit in Rod (Piston Pin to Rod Pin Bushing)
CRANKSHAFT:
Diameter
Main
Journal
Taper
Out of Round
Main Bearing Clearance
Crankshaft End Play
Crankpin
Rod Bearing Clearance (Select Fit)
Rod Side Clearance
1NOTE: Add 0.013mm to cylinder bore diameters to determine proper bore size for cylinders #7 and #8.
2NOTE: Ring end gap specifications are for new bores, worn bores will generate larger ring end gaps.
ENGINE SPECIFICATIONS
Refer to " Service Piston and Bore Specifications"
Refer to " Service Piston and Bore Specifications"
Bores 1 through 6
Bores 7 and 8
Top
2nd
Top
2nd
#1, #2, #3, #4
Refer to " Crankshaft Main Bearing Selection" Specifi­
#5
#1, #2, #3, #4
#5
Diameter
Taper
Out-of-Round
6.5L
L49, L56, L57, and L65
90-degree V8 Diesel
103
97
21.3:1
1-8-7-2-6-5-4-3
10 psi at idle (hot); 40-45 psi at 2000 RPM
0.02 (Maximum)
0.02 (Maximum)
.094-0.120
0.107-0.133
Keystone Type Ring
0.039-0.079
0.26-0.51
0.75-1.00
0.040-0.090
0.25-0.51
30.9961-31.0039
0.0101-0.0153
0.0081-0.0309
cations
0.005 (Maximum)
0.005 (Maximum)
0.045-0.083
0.055-0.093
0.10-0.25
60.913-60.939
0.005 (Maximum)
0.005 (Maximum)
0.045-0.100
0.17-0.63
T2842