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PART 8-5-
SPECIFICATIONS
8-69
VALVE MECHANISM (Continued)
302
l
351 2-V
2.07
351 4-V
2 05
VALVE SPRING OUT OF SQUARE-Maximum
All Engines
.078
VALVE SPRING PRESSURE-Lbs@ Specified
Lgth.
200 and 250
51-57@ 1.590
Wear Limit 46 @ 1.590
142-158 @ 1.222
Wear Limit 128 @ 1.222
VALVE SPRING-Lbs @Specified Length
PRESSURE
WEAR LIMIT
302, 351 2-V
76-84 @ 1.820
68 @ 1.820
199-221 @ 1.420
179 @ 1.420
351 4-V
85-95 @ 1.820
79 @ 1.820
271-299 @ 1.320
244 @ 1.320
VALVE SPRING ASSEMBLED HEIGHT
200 and 250
1 9/16-1 39/64
302-}
1 13/16-1 27/32
351
VALVE PUSH ROD MAXIMUM RUNOUT
All Engines
0.020
VALVE TAPPET DIAMETER-Standard
All Engines
0.8740-0.8745
VALVE TAPPET TO TAPPET BORE CLEARANCE
All Engines 0.0007-0.0027-Wear Limit 0.005
HYDRAULIC VALVE LIFTER LEAK DOWN RATE
-Wear Limit
All Engines (measured at 1/16 inch Plunger
Travel)
5-50 Seconds
ROCKER ARM TO ROCKER ARM SHAFT
CLEARANCE
200 and 250 0.002-0.0045-Wear Limit 0.006
ROCKER ARM SHAFT
O.D.
200 and 250
0.780-0.781
ROCKER ARM BORE DIAMETER
200 and 250
0.783-0.784
CAMSHAFT AND TIMING CHAIN
CAMSHAFT JOURNAL DIAMETER-Standard
200 and 250
1.8095-1.8105
CAMSHAFT JOURNAL-Diameter
302,351
1
2.1238-2.1248
2
2.0655-2.0665
3
2.0505-2.0515
4
2.0355-2.0365
5
2.0205-2.0215
CAMSHAFT JOURNAL TO BEARING CLEAR-
ANCE
All Engines
0.001-0.003-Wear Limit 0.006
CAMSHAFT JOURNAL MAXIMUM
OUT-OF-
ROUND
All Engines
0.0005
TIMING CHAIN MAXIMUM DEFLECTION
All Engines
0.5
CAMSHAFT LOBE LIFT
200 and 250 Intake and Exhaust
0.2455-
Wear Limit 0.240
CAMSHAFT AND TIMING CHAIN (Continued)
302, 351 2-V Intake
351 4-V
302, 351 2-V Exhaust
351 4-V
CAMSHAFT END PLAY
0.235
0.247
0.235
0.262
200 and 250
0.001-0.007-Wear
Limit
0.012
302 and 351
0.001 -0.006
-Wear
Limit 0.009
VALVE TIMING
200 and 250
Intake
Opens at 19° BTDC at
0.0022"
Lobe
Lift
Intake
Closes at 53° ABDC at 0.00475" Lobe Lift
Exhaust Opens at 60° BBDC at
0.0022'"
Lobe
Lift
Exhaust Closes at 16° ATDC at 0.00475'" Lobe Lift
302, 351
2-V 4-V
Intake
Opens at 12
o
18° BTDC at 0.004'" Lobe
Lift
Intake
Closes at66°70° ABDC at0.006" Lobe
Lift
Exhaust Opens at 66
o
81° B B DC at 0.004" Lobe
Lift
Exhaust Closes at 20
o
19° ATDC at
0.006'"
Lobe Lift
VALVE ROCKER RATIO
200 and 250
302,351
CAMSHAFT BEARINGS
INSIDE DIAMETER
1.54
:
1
1.73
:
1
200 and 250
1.8115-1 .8125
No.
1 bearing is
installed
with the front edge
0.11 5 to 0.125
inch
toward the rear
from the
front face of the cylinder block.
CAMSHAFT BEARING-Inside
302,351
1
2
3
4
5
Diameter
2.1258-2.1268
2.0675-2.0685
2.0525-2.0535
2.0375-2.0385
2.0225-2.0235
No. 1 bearing is installed with the front edge
0.005 to 0.020 inch toward the rear from the front
face of the cylinder
block.
CRANKSHAFT
MAIN BEARING JOURNAL DIAMETER
Standard
200 and 250
2.3990-2.3982
302, 351
2.7484-2.7492
MAIN BEARING JOURNAL RUNOUT-Maximum
200 and 250
0.0025-Wear Limit 0.0035
302, 351
0.004-Wear Limit 0.004
MAIN BEARING JOURNALS MAXIMUM OUT-
OF-ROUND
All Engines
0.0004
CONNECTING ROD BEARING JOURNALS
MAXIMUM TAPER
200 and 250
0.0004 per
inch
302 and 351
MAIN BEARING JOURNALS MAXIMUM TAPER
All Engines
0.0003 per inch
_
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