Datsun 1973 510 Repair Manual page 10

4 GENERAL INFORMATION AND MAINTENANCE
810
au
filter
810
aIr
filter
shoWing
wmg nuts
agamst
a
hard surface several
tImes
The
filter should be
replaced
every
24 000
miles Before mstallmg either the
ongl
nal
or a
replacement filter
wipe out
the
mSlde of the
aIr
cleaner
housmg with
a
clean
rag
or
paper
towel Install the
paper
aIr
cleaner filter seat the top
cover on
the
bottom
housmg
and
tIghten
the
wmg
nut
POSITIVE CRANKCASE
VENTILATION VALVE
ThiS valve
meters
crankcase blow
by
gases
mto
the mtake mamfold
to
be
burned With the normal
aIr
fuel
mixture
The
PCV
valve should be
replaced
every
24 000
miles Make
sure
that all
PCV
don
nectIons
are
tIght Check that the
con
nectmg hoses
are
clear and
not clogged
Replace
any
bnttle
or
broken hoses
To
replace
the valve
whICh
IS
located
m
the mtake mamfold
dIrectly
below the
carburetor
1
Squeeze
the hose
clamp
With
phers
and
remove
the hose
PCV valve
arrow
On the late models there
are so
many
hoses
m
the
way
the valve
1S
hard
to spot
Fresh
air
Blow
by
gas
1
Seal rubber
2 0 1 level gauge
3 Baffl
plate
4
0 1 cap
5 Flame
arrester
6
Throttle chamber
7
PC V valve
a
Steel
net
9 Baffle
plate
810 PCV valve
locabon others
SffiUlar