Valve Lifter And Push Rod; Camshaft And Camshaft Bearing; Camshaft Bearing Check; Valve Timing - Datsun 1200 1971 Workshop Repair Manual

Bn in1l
If camshaft
bearmg
clearance
IS exceSS1ve
replace
the camshaft
bearmgs
with
service
parts
When
valve
contact
surface of the valve
rocker
arm IS worn
excessively
m
step
repair
by
means
of
a
valve
grinder
or
replace
Grinding
allowance for valve
contact
surface
ofthe valve rocker
arm IS
0 0197
In
or
less
Valve Lifter and Push Rod
Check the valve hfter for
wear seizure
and
bevel
edge contact
and
repair
or
replace
as
reqUIred
Measure clearance between the hfter hole
on
the
cyhnder
block and valve hfter and
replace
the valve hfter when clearance
ex
ceeds the hmlt
Check the
push
rod for
bendmg
and
damage
and
repair
or
replace
as
reqUIred
Camshaft and Camshaft
Bearing
Measure
mner
dIameter of the camshaft
bearing
and
outer
diameter of the camshaft
Journal
Standard MaxlIDum
m
m
Valve hfter
hfter hole
o 0059
o
0008
to
0 0020
clearance
limit 0151010
00059
m
Standard
003 to
0071010
00012
to
00027
m
Fig
34 Camshaft
bearing
check
20
Valve
Timing
If the camshaft has
no apparent
damage
although
some
valve troubles have been detec
Standard
Wear
hm1t
1st
00015luOO024
2nd
00011
to 0
0020
Ot
3rd
clearance
00016
to
00025 o 0059
In
4th
00011
to 0
0020
5th
00015 toO 0024
1st
1 7257 to I 7261
Inner
2nd
1 7050 to 1 7060
diameter
of
camshaft
3rd
beanng
1 6865 to 1 6868
m
4th
I 6663 to I 6667
5th
1 6243 to 1 6247
TDC
DIRECTION
OF
ROTATION
EXHAUST INTAKE
BDC
Fig
35 Valve
timing diagram