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1B-34
ENGINES
SPECIFICATIONS
Six-Cylinder Engine Specifications
(USA)
Inches
Unless
Otherwise
Specified
( M E T R I C )
Millimeters
Unless
Otherwise
Specified
In Line, O H V , Six-Cylinder
3.75
95.25
Type
. . . . . . . . . . . . . . . . .
Bore
Stroke
258
3.895
98.93
Displacement
258 .
258 cubic inches
4.2 liters
Compression Ratio
8.0:1
Compression Pressure
258
150 psi
1034.3 kPa
Maximum Variation Between
Cylinders
20 psi
137.9 kPa
Firing Order . . . . . . . . . . . . . . .
1-5-3-6-2-4
Taxable Horsepower . . . .
. . . . . .
33.75 Bhp
25.2 kW
Fuel.
unleaded
Camshaft
Fuel Pump Eccentric Diameter
Tappet Clearance
End Play
Bearing Clearance
Bearing Journal Diameter
No. 1
No. 2
No. 3
. . . .
No. 4
Base Circle Runout
Cam Lobe Lift.
Intake Valve Timing
Opens.
. . . . . . . . . . . .
Closes.
Exhaust Valve Timing
Opens
Closes.
Valve Overlap . . ...
.
Intake Duration
Exhaust Duration
1.615-1.625
41.02-41.28
Zero Lash (Hydraulic tappets)
Zero (engine operating)
0.001-0.003
0.025-0.076
2.029-2.030
2.019-2.020
2.009-2.010
1.999-2.000
0.001 (max)
0.248
51.54-51.56
51.28-51.31
51.03-51.05
50.78-50.80
0.03 (max)
6.30
Connecting Rods
Total Weight (less bearings)
258 .
.
Total Length (center-to-center)
258
Piston Pin Bore Diameter
Connecting Rod Bore (less bearings)
Bearing Clearance
14.58° BTDC
68.790 ABDC
55.59° BBDC
27.78° A T D C
4 2 . 3 6 °
263.37°
263.37°
695-703 grams
Side Clearance. .
Maximum Twist.
Maximum Bend .
Crankshaft
End Play
Main Bearing Journal Diameter
Main Bearing Journal Width
No. 1
No. 3
No. 2-4-5-6-7
Main Bearing Clearance.
. . . .
5.873-5.877
0.9288-0.9298
2.2085-2.2080
0.001-0.0025
(0.0015-0.002
preferred)
0.005-0.014
0.001 per inch
0.0005
per inch
0.0015-0.0065
2.4986-2.5001
1.086-1.098
1.271-1.273
1.182-1.188
0.001-0.003
(0.0025
preferred)
149.17-140.28
23.59-23.62
56.09-56.08
0.03-0.06
(0.044
preferred)
0.13-0.36
0.025 per
25.4 mm
0.0127 per
25.4 mm
0.038-0.165
63.464-63.502
27.58-27.89
32.28-32.33
30.02-30.18
0.03-0.08
(0.064
preferred)
Connecting Rod Journal Diameter .
Connecting Rod Journal Width . .
Connecting Rod Bearing Clearance
Maximum Out-of-Round
(All Journals)
Maximum Taper (All Journals)
(USA)
Inches
Unless
Otherwise
Specified
2.0934-2.0955
1.070-1.076
0.001-0.0025
(0.0015-0.002
preferred)
0.0005
0.0005
(METRIC)
Millimeters
Unless
Otherwise
Specified
53.17-53.23
27.18-27.33
0.03-0.06
(0.038-0.051
preferred)
0.013
0.013
Cylinder Block
Deck Height
9.487-9.493
240.97-241.12
Deck Clearance
0.0148
0.3759
(below block)
(below block)
Cylinder Bore (standard)
3.7501-3.7533
95.253-95.334
Maximum Cylinder Taper
0.005
0.13
Maximum Cylinder
(Out-of-Round)
0.003
0.08
Tappet Bore Diameter
0.905-0.906
22.99-23.01
Cylinder Block Flatness
0.001/1-0.002/6 0.03/25-0.05/152
0.0008 (max)
0.20 (max)
Cylinder Head
Combustion Chamber Volume . . . .
67.84-70.84cc
Valve Arrangement
EI-IE-IE-EI-EI-IE
Valve Guide ID (Integral)
0.3735-0.3745
9.487-9.512
Valve Stem-to-Guide Clearance . . . .
0.001-0.003
0.03-0.08
Intake Valve Seat Angle
3 0 °
Exhaust Valve Seat Angle
4 4 . 5 °
Valve Seat Width
0.040-0.060
1.02-1.52
Valve Seat Runout
0.0025
0.064
Cylinder Head Flatness
0.001/1-0.002/6 0.03/25-0.05/152
0.008 (max)
0 20 (max)
Lubrication System
Engine Oil Capacity.
Normal Operating Pressure.
Oil Pressure Relief . . .
Gear-to-Body Clearance
Gear End Clearance, Plastigage . .
Gear End Clearance, Feeler Gauge .
Pistons
Weight (less pin)
Piston Pin Bore Centerline-to-Piston
Top
4 quarts
(Add 1 quart
with filter
change)
13psi at
600 rpm;
37-75 psi
(max) at
1600+ rpm
75 psi (max)
0.0005-0.0025
(0.0005
preferred)
0.002-0.008
(0.002
preferred)
0.004-0.008
(0.007
preferred)
3.8 liters
(Add 0.9
liter with filter
change)
89.6 kPa at
600 r p m ;
255.1-517.1
kPa (max) at
1600+ rpm
517.1 kPa (max)
0.0127-0.0635
(0.0127
preferred)
0.0508-0.2032
(0.0508
preferred)
0.1016-0.2032
(0.1778
preferred)
498-502 grams
Piston-to-Bore Clearance
Piston Ring Gap Clearance -
Compression (both) . .
1.599-1.603
0.0009-0.0017
(0.0012-0.0013
preferred)
0.010-0.020
40.61-40.72
0.023-0.043
(0.030-0.033
preferred)
0.25-0.51
6 0 2 6 3 A
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