1942 - 1947 CHEVROLET SHOP MANUAL
Section 6 - Engine
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ENGINE SPECIFICATIONS |
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Bore:
Regular 216.5 Engine................................. 3-1/2"
Heavy Duty 235.5 Engine............................., 3-9/16'
Piston
Displacement (Cu. In.):
Regular
Engine.................................
. 216.5
Heavy Duty
Engine ................................
235.5
Maximum
Brake Horsepower:
Passenger
Cars @ 3300 R.P.M.......................... 90
Trucks,
Conv. @ 3300 R.P.M.......................... 90
Trucks,
C.O.E. @ 3300 R.P.M.
...............87
Trucks,
Conv. (235.5 Engine) @ 3100 R.P.M............. 93
Trucks,
C.O.E. (235.5 Engine) @ 3100 R.P.M.............90
Rated
Horsepower:
Regular
Engine, S.A.E.
........................ 29.4
Heavy
Duty Engine, S.A.E..........................30.4
Firing
Order
.
..........
1-5-3-6-2-4
Cylinder
Bores—Out of Round or Taper-Not to Exceed
.001"
Main
Bearing Journal Diameters:
Front
....................... 2.6835 to 2.6845
Front
Intermediate .....................
2.7145 to
2.7155
Rear
Intermediate .........................
2.7455 to
2.7465
Rear . . .
..................... 2.7765 to 2.7775
Connecting Rod Journal Diameter
. . ......... 2.311 to 2.312
Crankshaft:
—Alignment (Run-Out) At
Intermediate Journals .002" Max.
-End Play
.
.................
.004" to
.007"
-Gear
Run-Out .............................
.003"
Timing Gear
Backlash ...................002" to .005"
Clutch
Housing Transmission Pilot Hole Run-Out......... .008"
Flywheel
Run-Out on Face and Rim ............
.008"
Valve
Spring:
Free Length . . ................
2-1/8"
Pressure
when Compressed to 1-1/2".............
121 to 133
Lbs.
Intake
Valve:
-Tappet
Clearance (Hot)....................
.006" to
.008"
-Stem
Diameter
................'. .3410 to .3417
-Stem and
Guide Clearance....................001" to .003"
-Angle at
Face
...........................
30°
Spark
Plug Gap ...........................................040" |
Stroke:
Regular
216.5 Engine ................................
3-3/4"
Heavy Duty
235.5 Engine .............................3-15/16"
Compression
Ratio:
Regular
Engine ..................................
6.50 to 1
Heavy Duty
Engine ..............................
6.62 to 1
Maximum
Torque (Ft.-Lbs.):
Passenger Cars @ 1200 to 2000
R.P.M....................174
Trucks, Conv. @ 1200 to 2000
R.P.M..................174
Trucks,
C.O.E. @ 1200 to 2000 R.P.M.
.....172
Trucks, Conv. (235.5 Engine) @
1000 to 1900 R.P.M......192
Trucks, C.O.E. (235.5 Engine) @
1000 to 1900 R.P.M..... 189
Weight of Piston and Piston Pin
Bushings (Ounces) :
Passenger
Cars (216.5 Engine)...................27.15
Trucks
(216.5 Engine) ............................. 28.56
Camshaft
Journal Diameters;
Front
........................ 2.0282 to 2.0292
Front
Intermediate .....................
1.9657 to
1.9667
Rear
Intermediate ..........................1.9032 to 1.9042
Rear . . . .
.............. 1.8407 to
1.8417
Connecting Rod Bearing End
Clearance .......004" to .011"
Camshaft:
—Alignment
(Run-Out At Intermediate Bearing) .002" Max.
-End
Play
............
Free to .003"
-Bearing
Clearance .........................002" to .004"
-Gear
Run-Out
...........................
.004"
Piston:
-Clearance-Pass on
.002"-Lock on .003"
-Ring
Gap
-.
. .005" to .015"
—Ring Clearance in
Groove—Compression
.0015" to .003"
-Oil
Control
.002" to .0035"
-Piston Pin Fit ... Tight Thumb Push Fit -Piston Pin Diameter
.................8645" to .8650"
Exhaust
Valve:
-Tappet
Clearance (Hot) ...............t......013" to .015"
-Stem
Diameter
...........
.3400 to
.3407
-Stem and
Guide Clearance ..............002" to .004"
—Angle at Face
.............................
30°
Breaker Point Gap ........................................018" |
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