GMC T Series 1994 Repair Manual page 564

CRANKSHAFT M AIN BEARING SELECTION AND SPECIFICATIONS
CRANKSHAFT MAIN JOURNAL
DIAMETERS
#1 TO #4
74.917
74.925
BLUE
74.925
74.933
ORANGE OR RED ORANGE OR RED
74.933
74.942
WHITE
CASE, CAM SHAFT AND CAMSHAFT BEARINGS (m m )
Camshaft Journal Diameter O.D.
(Diameter Tolerance .055mm
Finished Cam Bearing I.D.
(Diameter Tolerance .038mm
Camshaft Bearing Clearance
Cam Bore Diameter (Case)
Cam Bearing O.D.
Press Fig (Bearing to Case)
Note: In order to cover all possible service conditions (i.e., old cam with large journal diameter matched with new
block with small bore diameter), the camshaft and camshaft bearing service specifications are different than pro­
duction specifications.
CRANKSHAFT PIN JOURNALS AND CONNECTING ROD BEARINGS
CRANKSHAFT PIN
JOURNAL DIAMETER
60.913mm
60.926mm Green
60.926mm
60.939mm Yellow
CO NNECTING ROD TO CRANKSHAFT JOURNAL BEARING
CALC58ULATED CLEARANCE
.035mm
.090mm
' Actual clearance based upon estimated bearing distortion of 0.01mm.
6.5L ENGINES
#5 79.850
79.842
STAMP 3
74.912 1-.026 U.S. IN CASE
1-.026 U.S. IN CAP
74.920
BLUE
74.920 1-.026 U.S. IN CASE
74.928 1-.013 U.S. IN CAP
1-.026 U.S. IN CASE
74.928
1-STD IN CAP
74.936
WHITE
SPECIFICATIONS
€i.5L ENGINES
#1 #2
55.025 55.025
54.970 54.970
55.088 55.088
55.050 55.050
.118 .118
.025 .025
59.17 58.92
59.12 58.87
59.30 59.05
59.25 59.00
.18 .18
.08 .08
CONNECTING ROD
BEARINGS
Standard in Rod
.026 U.S. in Cap
Standard in Rod
Standard in Cap
58CLEARANCE
.0014"
.0035"
CYLINDER & CASE
MAIN BEARING BORE DIAMETERS
79.842
79.834
STAMP 2
1-.013 U.S. IN CASE
1-.026 U.S. IN CAP
1 -.013 U.S. IN CASE
1 -.013 U.S. IN CAP
1 -.013 U.S. IN CASE
1-STD IN CAP
#3
55.025
54.970
55.088
55.050
.118
.025
58.67
58.621
58.80
58.75
.18
.08
ROD & CAP BEARINGS
COLOR CODES
.026 U.S.
(Green)
Standard
(Yellow)
*ACTUAL CLEARANCE
.045mm
.100mm
79.834
79.826
STAMP 1
1-STD IN CASE
1-.026 U.S. IN CAP
1-STD IN CASE
1-.013 U.S. IN CAP
1-STD CASE
1-STD IN CAP
T3031
#4 #5
55.025 51.025
54.970 50.970
55.088 51.083
55.050 51.045
.113
.118
.025 .020
58.42 50.42
50.37
58.37
58.55 50.55
50.50
58.50
.18 .18
.08 .08
T3034
CONNECTING ROD I.D.
64.150mm
64.124mm
.0018"
.0039"