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2-4
SPECIFICATIONS
ENGINE
(26)
2-3 ENGINE DIMENSIONS, FITS AND ADJUSTMENTS
NOTE: Dimensions and limits for
fit
of parts apply to new
parts only
. Where
limits are given,
"T"
means
tight and "L" means loose.
a.
Crankshaft
and Connecting Rod
Bearings
2.3105"-
2.3115 "
2.5605"-2.5615
"
2.3735"
-2.3745"
2.6235"-
2.6245"
2.4355"-2.4365"
2.6855"-2.6865"
2.4985
"-2.4995"
2.7485"-
2.7495 "
2.5605"-
2.56 15'
2.8105'
-2.811 5'
•
.0005"
to
.002"
~
•
.004'
to .008'
~
C
.000 4"Tto .00 12' L
~
1.997"-1.999'
2.248 "-2.249'
1.998"-1.999 "
2.248 "-2.24
9"
C
.000 5'
t
o .002"
~
•
.005"
to
.010"
~
7%"
8W
•
.010
"
to .020"
~
C
.010
" to
.020
'
~
+-No
Checking
or Fittin g
R
eq
uired-e-s-
C
.00
15" Go- .002" No Go
~
21
~ '
3
~6 "
.8 124"- .8 129"
.8744
"- .8749
"
+
-F in
ger Push F
it
(.0003" -.0004 ")
~
~"
~"
;{6"
;{6"
~
.1855"-.1865"
~
Item.
Crankshaft Bearing Nominal
Diam.
x Length-
Front
.
Front Center
.
Center
.
Rear Center
.
Rear
.
Crankshaft Journal
Diameters-
Front
.
Front Center
.
Center
.
Rear Center
.
Rear
.
Crankshaft Journal to Bearing Clearance
.
Crankshaft End Play, at Center Bearing
.
Fit of Main Drive Gear Pilot Bearing in Crankshaft
.
Crankpin Journal Diam.-1948
.
Crankpin Journal Diam.-1949
.
Crankpin Journal to Bearing
Clearance
.
End Clearance of Connecting Rod on
Crankpin
.
Connecting Rod Length, Center to Center
.
b. Cylinders,
Pistons,
Pins and Rings
Cylinder
Bores,
Standard
Size
.
Piston
Length,
Overall
.
Piston Diameter at 90
°
to Piston Pin-
Standard
.
.005"
Oversize
.
.010 "
Oversize
.
.020"
Oversize
.
.030" Oversize
.
Piston Clearance in Cylinder Bore at Top of Skirt
.
Piston Fit at 70
°
F, Using
Feeler Gauges,
Allowing Piston to Drop
on
its
Pis~~ie~gth:
:
:
:
:
:
: : : :
:
:
: :
: : :
:
: :
:
:
: :
:
: : : :
:
: : : : :
: : :
:
: :
: :
:
:
: : :
:
:
Piston Pin
Diameter
.
Piston Pin
Fit
in P
ist on at 70°
F
.
Width of
Compression
Rings
.
Width of
Channele d Oil R
in gs
.
Width of
Flex-Fit Oil Rings
.
Width of Gap, Ring in Bo
re-
Compression Ring
.
Upper Oil Ring
.
Flex-Fit
Oil Ring
.
Side Clearance of Rings in Piston
Groove-
Compression Ring
.
Upper Oil R
ing
,
.
F
lex-Fit
Ring
.
c. Camshaft and Valve Mechanism
SerI••
40-50
3.091
' -3.094 '
4
2~ '
3.0910"-3.0922"
3.0966"-3.0972"
3.1016"-
3. 1022 "
3.1116"-
3.112 2"
3.121 6'
-3.1222"
.0018"-.002 4'
5.ri•• 70
3
.436 "-3.439'
4%"
3.4
358"-3.4370'
3 .4414"-3.4420"
3.4
464
"-3.4470
"
3.4
564
"-
3.4570"
3.4664"-
3.4 670
"
.002"-
.00 26"
Camshaft
E
n d
Play
.
Camshaft Bearings-Diam. x
Length-
No.1
.
No.2
.
No.3
.
No.4
.
No.5
.
Camshaft Clearance in Bearings
.
Valve Lifter Diameter
.
Valve
Lifter Clearance in Crankcase
.
Rocker Arm Shaft
O.D
.
Rocker Arm Clearance on
Shaft
.
Valve Head Diameter-Inlet
.
Exhaust
.
Valve Seat Angle-Inlet and Exhaust
;
.
Valve Lift-Inlet
.
Exhaust
.
•
.04"
to
.008'
~
2%' x
1
~ '
2%' x
1~"
2~'
x
~'
2~'
X
11j{6'
2~"
x 1% "
2~"
x
1
~ '
2~6'
X
~"
2~6 "
X
11j{6"
1
~'
x
3\.i2"
1
~ "
x
3\.i2"
C
.0005"-
.00 35"
~
C
.9975'-.9985"
~
C
.000
5'
- .00 25"
~
I%;'
1;{6'
C
.002'
-
.004'
~
11
~'
12% '
1 1
\.i2'
1
' ! 16"
•
45 Degr ees
~
.348"
.347"
.342'
.348
"
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