ignition NISSAN 300ZX 1984 Z31 Maintenance Workshop Manual

ENGINE MAINTENANCE
Checking Fuel System
Check fuel lines and tank for proper attachment,
leaks, cracks, damage,
loose connections, chafing
and deterioration
SMA803A
CAUTION.
a. Do not reuse fuel hose clamp after loosening
b. Tighten high pressure rubber hose clamp
so
that clamp end is 3 mm (0.12 in) from hose
end or screw position (wider than other
portions of clamp)
is flush with hose end.
Tightening torque specifications are the same
for all rubber hose clamps.
When tightening hose clamp, ensure that screw
does not come into contact with adjacent
parts
10-1dNm IO 10 -0.15 kgm. 07 - 1 1 h-lbl
SMAS04A
Replacing Fuel Filter
Before removing fuel filter, release fuel pressure
from fuel line
to eliminate danger.
1 Start engine
2 Remove luggage floor mat
3. Disconnect fuel pump harness connector with
engine running
SEF7148
4. After engine stalls, crank engine two or three
times to make sure that pressure
is released
5 Turn ignition switch off and connect fuel
pump harness connector
6 Loosen fuel hose clamps
SMA780A
7 Replace fuel filter.
Do not reuse fuel hose clamps.
Be careful not to spill fuel over engine com-
partment. Place a rag
to absorb fuel.
Use high pressure type fuel filter. Do not use a
synthetic resinous
fuel filter.
MA-9
I

ENGINE MAINTENANCE
Changing Ei
WARNING:
To avoid the danger of being scalded, never
attempt to change the coolant when the engine
is hot.
1 Before drainmg engine coolant
1) Except auto air conditioner equipped models
Slide temperature control lever to
"HOT"
position
SMAJ81 A
2) Auto air conditioner equipped models
Turn ignition switch
"ON" and set temperature
at maximum
Then turn ignition switch
"OFF".
SMA782A
2 Open radiator cap and drain plug to drain
engine coolant.
SMA703A
ine Coolant
3 Open drain plug on right side of cylinder block
to drain coolant from cylinder block.
4 Close drain plug and drain cock securely Then,
fill radiator with water and warm up engine
5 Stop engine and wait until it cools down.
6. Repeat procedure from step 2 through step 5
two or three times.
7 Drain water and fill radiator and engine with
new coolant up to
filler opening Follow
instructions attached to anti-freeze container
for
mixing ratio of anti-freeze to water.
Slowly pour coolant through coolant fryer neck
to allow air in system to escape.
8. Fill reservoir tank up to "MAX" level Then
close radiator cap.
9. Run the engine at approximately 2,000 rpm
for about one minute.
IO. Stop the engine and after it cools down, refill
the radiator
and engine with coolant up to the
filler opening. Fill the reservoir tank with
coolant up to "MAX" level.
Coolant capacity:
VG30E engine
VG30ET engine
10.5 P (11-1/8 US qt, 9-1/4 Imp qt)
11.0 P (1 1-5/8 US qt, 9-5/8 Imp qt)
MA-1 0

ENGINE MAINTENANCE
Checking and Replacing
Spark Plugs (Cont’d)
5 Install spark plugs Reconnect high tension
cables according to
Nos indicated on them.
0 . Spark plug
20 - 29 Nm
(2.0 - 3.0 kg-m, 14 - 22 ft-lb)
Checking Ignition Wires
1. Check the high tension wires for cracks,
damage, burned terminals and proper fit
2. Measure the resistance of the high tension
wires, by shaking it and checking for intermit-
tent brakes
SMA789A
MA-I 3

ENGINE MAINTENANCE
Checking idle Speed (VG30E engine)
Preparation
WARNING:
a. Depress brake pedal while accelerating the engine to prevent forward surge of vehicle.
b. Inspection should
be carried out while shift lever IS in "D" position on automatic transmission equipped
models.
c. After inspection and adjustment have been made, shift the lever to "N" or "P" position.
Engage parking brake and lock both front and rear wheels with wheel chocks.
Turn
off air conditioner and headlamps.
Keep front wheels straight ahead.
c START I 1
Start engine and warm up untgl water
temperature Indicator poinrs to middle of
I
To harness 4
Stop engine and anach adapter harness between ignmon coil primary winding terminals and harness connector Then set
timer under no-load, then run engine at
+
Stop engine and connect idle UP solenoid
harness connector
Dismnnm adapter harness Connector and
connect ignition
coil harness connector io
(- END
MA-I 4
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SPECIAL SERVICE TOOL
EG11150000
(-)
Tool name Tool number
(Kent-Moore
No I
Ignition coil adapter harness
MA-38