Subaru 1600 Service Manual page 22

(3) Purge line
a. Disconnect purge hose from the
pipe CP
CD.
b. Check for unobstacled line by
blowing air into the hose.
~.
@-
I
®
1
PipeCP
2 Canister
3 Carburetor
4 Hose clamp
Fig.2·18 Purge line
(4) Canister
A3·258
a. Disconnect vacuum vent hose from
pipe CP
CD.
Then check for no air
leak of vacuum chamber for purge
control valve in canister by blowing
into hose. If air can be blown into
canister, replace it with new one
because disphragrn is broken.
b. Disconnect two hoses of carburetor
vapor line and tank vapor line from
pipe CP
CD.
Then check for air
passage by blowing lightly in it. If
air does not pass, replace canister
with new one.
c. Disconnect hose of purge line from
pipeCP
CD.
Check for air passage by blowing in
it. If air passes, replace canister
with new one.
d. If canister case is cracked, replace it
with new one.
PERIODIC MAINTENANCE SERVICES
Purge vent
Vacuum release
orifice
0.4 mm (0.016 inl dia.
Orifice
1.5 mm (0.059 inl
dia.
Purge control valve
Fig.
2·19
Activated
carbon
Filter
(5) Vacuum switching valve and
thermo valve (California models and
non4WD of non-California models)
a. After the engine has cooled below
50°C (122°F), disconnect the hose
@
from the vacuum switching
valve
CD.
Blow through the open
end of the hose to ensure there is
no air flow at the port in the
thermo valve
®.
If there is air
flow, replace the thermo valve.
b. After the engine has warmed above
64°C (l47°F), disconnect the hose
@
from the vacuum switching
valve
CD.
Blow through the open
end of the hose to check if there is
air flow at the port in the thermo
valve. If there is no air flow, replace
the thermo valve.
c. Disconnect the hoses
@
and
@
from the vacuum switching valve
CD .
Blow through the nipple of the
vacuum switching valve on the
carburetor side to ensure there is
no leakage. Similarly, blow through
the nipple on the thermo valve side
2-8
From carburetor
From fuel tank
Vacuum vent
00
000
00
00
I Vacuum switching valve
2 Thermo valve
3 Hose
4 Hose
5 Carburetor
Fig. 2·20
A3-259
A3-260
to ensure there is no leakage. In
either case, if there is a leak, replace
the vacuum switching valve.