Subaru 1600 Service Manual page 72

2) For 49 States 4WD &
4WD·AT, and Canada
Adjust engine idle mixture as follows:
I) Start engine and warm up suffi·
ciently,
2)
Inspect idle speed and CO per·
centage in exhaust gas with secondary
air,
Other
AT&
than
AT
4WD·AT
Idle speed (rpm) 700±100 800±IOO
Without
secondary
2.0±1.0 1.S±1.0
CO
air
percent·
age (%) With
secondary 0- O.S
air
- -
3)
Disconnect air suction hose be·
tween air suction valve and secondary
air cleaner.
4) Clog air suction pipe with rubber
cap or the like,
5) Inspect idle speed and CO per·
centage in exhaust gas without second·
ary air.
6) If necessary, adjust idle speed and
CO percentage in exhaust gas while
clogging air suction pipe,
a. Adjust both throttle adjusting screw
and idle mixture adjusting screw to
obtain the specified idle speed and
CO percentage without secondary
air.
b, Remove the plug clogging air
suction pipe, and connect the pipe
to secondary air cleaner hose.
c. With secondary air, recheck that
idle speed and CO percentage
satisfy the specifications.
6. Radiator
Check radiator, hoses and their con·
nections for damage, clogging or
leakage.
A. Testing of radiator cap
Check the valve, spring and packing in
the cap for damage.
ENGINE
Check rubber seal on cap for tears,
cracks or deterioration after cleaning
it.
Install the cap on a tester and if cap
does not hold or does not release the
specified pressure, replace cap.
Standard pres·
sure at which
valve starts to
open
88 kPa
(0.9 kg/cml,
13
psi)
Fig. 3-35 Testing the cap
8. Testing of radiator leakage
Inspect radiator for leakage using a
cap tester and applying a pressure of
157 kPa(1.6 kg/cml, 23 psi).
If a leakage is detected, repair or
replace the radiator.
Fig.3-36 Testing the radiator
7. Hydraulic Valve
Lifter
A. Replacement
A7·026
The hydraulic valve lifter can be
replaced even when the engine is
mounted on the vehicle as follows:
I) Disconnect both the blow·by and
PCV
hoses.
2) Remove the valve rocker cover.
3) Using the special tool (Socket
Wrench: 899988607), loosen the valve
rocker ASSY and remove the push rod.
4) Raise the vehicle body with a jack
and support it on a safety stand.
S)
Remove the nuts which secure the
front engine mounting and slightly
raise the engine using a floor crane.
6) Remove the drain plug to drain
the engine oil completely. Detach the
oil pan.
7)
Remove the hydraulic valve lifter.
Use of a magnet facilitates removal.
A5·678
Fig, 3·37
8) The valve lifter can be installed in
the reverse order.
8. Adjustment
I) Perform adjustment in cold con·
dition [coolant temperature: 20 to
40°C (68 to 104°F)).
2) Retighten cylinder head nuts and
bolts previously if necessary.
3) Adjust hydraulic valve lifter with
the following procedures:
a. Perform adjustment in two (2)
sequences.
Sequence (I)
Position #1 cylinder at TDC
(compression), and adjust the
valve lifters for intake and
exhaust valves on #1 cylinder,
for exhaust valve on #3 cylinder
and for intake valve on
#4
cylinder.