3304 VEHICULAR ENGINES
SPECIFICATIONS
TM 5-3805-263-14&P-2
CAMSHAFT GROUP
IN4436
NOTE: Put a layer of graphite grease on lobes of camshaft when
installing.
(1)
(2)
(3)
Width of groove in camshaft for thrust washer
(new)
190 ± .002 in. (4.83 ± 0.05 mm)
Thickness of thrust washer
(new)
183 ± .001 in. (4.65 ± 0.03 mm)
End play of the camshaft
(new)
.007 ± .003 in. (0.18 ± 0.08 mm)
Maximum permissible end play (worn)
.025 in. (0.64 mm)
Diameter of camshaft bearing surface (journal)
(new)
2.3110 ± .0005 in. (58.699 ± 0.013 mm)
Bore in bearing for camshaft
(new)
2.3150 ± .0024 in. (58.801 ± 0.061 mm)
Clearance between bearing and bearing surface
(journal) (new)
.002 to .006 in. (0.05 to 0.15 mm)
Maximum permissible clearance between bearing and bearing
surface (journal) (worn)
.008 in. (0.20 mm)
NOTE: Make reference lo CYLINDER BLOCK for installation dimen-
sions.
(5) Height of camshaft lobes
To find lobs lift, use the procedure that follows:
A. Measure camshaft lobe height (5).
B. Measure base circle (6).
C. Subtract base circle (STEP B) from lobe height (STEP A). The
difference is actual lobe lift (4).
D. Specified camshaft lobe lift (4) is
3300 in. (8.382 mm)
Maximum permissible difference between actual lobe lift (STEP C)
and specified lobe lift (STEP D) is
.010 in. (0.25 mm)
(1)
(2)
(3)
(4)
Bore in bearing for shaft
(new)
.7263 ± .0005 in. (18.448 ± 0.013 mm)
Diameter of shaft
(new)
.7245 ± .0005 in. (18.402 ± 0.013 mm)
Maximum permissible clearance between bearing and shaft
(worn)
.008 in. (0.20 mm)
Torque for locknut on valve adjustment
screw . . . . . . . . . . . . . . . . . . . . . . . . . 21 ± 5 lb. ft. (29 ± 7 N·m)
Clearance for valves:
Intake valves
.015 in. (0.38mm)
Exhaust valves
.025 in. (0.64 mm)
Diameter of valve lifter
(new)
1.3105 ± .0005 in. (33.287 ± 0.013 mm)
Bore in block for valve lifter
(new) ....................
1.3145 ± .0010 in. (33.388 ± 0.025 mm)
Maximum permissible clearance between lifter and bore
for valve lifter (worn). . . . . . . . . . . . . . . . . . . .
.012 in. (0.30 mm)
VALVE MECHANISM GROUP
7N8024
1-230
