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ENGINE
Items
Valve Stem
Diameter-Inlet
.
Exhaust
.
Va lve Stem Clearance in
Guide-
Inlet
.
Exhaust
.
Valve Guide Extension from Top of
Cyl.
Head
.
Inner Valve
Spring,
used with
Adjustable
Valve Lash
Valve
Open
(lbs.
@
length)
.
Valve Closed
(lbs.
@
length)
.
Outer Valve Spring, used with Adjustable Valve Lash-
Valve Open (lbs ,
@
length)
.
Valve Closed (lbs .
@
length)
.
Inner Valve Spring, used with
Hydraulic Lifters-
.
Valve Open
(lbs.
@
length)
.
:
.
Valve Closed
(lbs.
@
length)
.
Outer Valve Spring, used with
Hydraulic Lifters-
Valve Open
(lbs.
@
length)
.
Valve Closed (lbs.
@
length)
.
SPECIFICATIONS
2-5
Serles 40-50
Series
70
(
.3715' - .3725'
~
(
.3711'
-
.3719'
~
(
.0015"-.0035"
~
(
.00 21'-
.0039"
~
1
~2 "
1%'
(
48-54
@
1
~ '
~
(
17
.5-22.5
@
1Z
~ '
~
(
74-80
@
11
~ft
~
(
29.5-34 .5
@
1 1
U6'
~
(
49-55
@
1
~ "
~
(
22-26
@
12
~
'
~
(
116-124
@
1 1
%'
~
(
49-55
@
1
1~'
~
(
72'
,
See
fig
.
2-41
~
(
.0006 ' L to .0009' T
~
%'
%"
(
.00 1" T to .00
25"
T
~
(
1%4'
from End
~
(
1% "
Elbow
~
(
I
I%;"
~
(
148
°
F to 155° F
~
(
N
ot
over 175° F
~
(
178° F to 185
°
F
~
(
Not
over 211 ° F
~
d. Valve Lash
NOTE:
Does
not apply to engines equipped
with hydraulic
valve
lifters.
Valve Lash
at
Road Operating T
emp.-
Inlet and Exhaust
. . .
. .
.
. . .
.
.
.
.
. . .
.
. .
.
.
.
. .
.
.
. .
.
.
.
.
.
. .
. .
. .
. . .
.
. .
.
.015'
.015'
Valve Lash Using Shop Procedure.
.
-..1(---.017'
Go-
.018·
No
Go--~
e. Engine Oiling System
Pump Shaft to Bearing Clearance. .
.
.
. .
. .
.
.
.
.
.
.
. . .
.
.
. .
.
.
.
.
.
. . .
.
.
.
.
.
.
.
....(f------.001 ·
to
.0025·---
--J~
Pump Idler Gear Bearing Clearance
.
.
.
. .
.
. . . .
. . . . .
. .
.
.
.
.
.
. .
.
.
. . . .
. .
. .
(
.001"-
.0025·-----..
Pump
Driving Gear Backlash
.
. .
.
.
.
.
.
.
.
. .
.
.
.
. . .
.
.
. .
.
. . .
. .
. . . . .
.
. . .
. . .
(
.00
3'
-
.005·-----~
Pump Drive and Idler Gears
Backlash.
.
(
.OO3·-.006"-----~
Pump Drive and Idler Gears
End Clearance.
.
.
(
.000
5·
-
.004·
-
- -
- -..
Oil Pressure Valve Clearance in Body
. . . .
.
.
. .
.
. . . . . ..
.
..
.
.
.
.
. ....
.
...
.
(
.003
·
- . 006 ·-----~
f.
Engine
Cooling System
Fan Belt Adjustment
.
F
it of Bearing in Water Pump
Body
.
Pump_Bearing Shaft Diameter
.
Fan Hub Fit on Bearing Shaft
.
Fan
Hub Position on Shaft
.
Rad ia tor Hose Inside Diam. and Type
.
By-P ass H
ose
Inside Diam
.
Standard (151°) Radiator
Thermostat Calibration ,
@
Atm. Press.-
Start to Leave Seat
.
Fully Open
.
High
Temp.
(182°) Radiator Thermostat
Calibra tion,
@
At m . Press.
Start t
o
Leave Seat
.
Fully
Open
.
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