1995 NISSAN ALMERA N15 Service Manual

KV11290220SEF833
SEF834
SEF835 INJECTION
NOZZLE ~
Cleaning (Coni'd)

4. Clean sprayholeofnozzle bodybyusing Tool.

To prevent sprayholefrom canting, alwayscleanitby starting
with inner sideandworking towardsoutside.

5. Decarbonate nozzleneedle tipbyusing Tool.
6. Check needle sinking.
(1) Pull needle abouthalfway outfrom body andthen release

it.

(2) Needle shouldsinkintobody verysmoothly fromjustits
own weight.
(3) Repeat thistestand rotate needle slightly eachtime.

If
needle failstosink smoothly fromanyposition, replaceboth
needle andbody asaunit.
KV11292010 SEF671AAssembly

Assemble inthe reverse orderofdisassembly, observingthe
following.

If
nozzle bodyisnot installed properly, Toolcannot beremoved
and nozzle bodymaybedamaged.
Holder tonozzle nut:

(OJ:
78-98 N'm (8.0-10.0 kg-m, 58-72 ft-Ib)
EC-378

EF791AINJECTION
NOZZLE

Test andAdjustment
WARNING:
When usingnozzle tester,becareful nottoallow diesel fuel
sprayed fromnozzle tocontact yourhands orbody, andmake
sure your eyes areproperly protected withgoggles .

INJECTION PRESSURE TEST

1. Install nozzle toinjection nozzletesterandbleed airfrom
flare nut.

•

SEF672A
2.
Pump thetester handle slowly(onetime persecond) and
watch thepressure gauge.
3. Read thepressure gaugewhentheinjection pressure just
starts dropping.
Initial injection pressure:
Used 12,259 -13,239 kPa(122.6 -132.4 bar,
125 -135 kg/cm
2,
1,778•1,920 psi)
New 12,749 -13,534 kPa(127.5 -135.3 bar,
130 -138 kg/cm
2,
1,849•1,962 psi)
Always checkinitialinjection pressure usinganew nozzle.

Adjusting shim

SEF673A
4.
Toadjust injection pressure, changeadjusting shims.
a. Increasing thethickness ofadjusting shimsincreases initial
injection pressure. Decreasing thicknessreducesinitial
pressure.
b. Ashim thickness of0.04 mm(0.0016 in)corresponds
approximately toadifference of471 kPa (4.71 bar,4.8
kg/cm
2,
68psi) ininitial injection pressure.
Refer toSDS foradjusting shim(EC-419).

EC-379

INJECTIONNOZZLE ~
Test andAdjustment (Cont'd)
LEAKAGE TEST

1. Maintain thepressure atabout 981to1,961 kPa(9.8to19.6
bar, 10to20 kg/cm
2,
142to284 psi) below initialinjection
pressure.
2. Check thatthere isno dripping fromthenozzle tiporaround
the body.
Good
Faulty
SEF674A
3.Ifthere isleakage, clean,overhaul orreplace nozzle.

Good
I

Wrong
•

EF794 SPRAY
PATTERN TEST

1. Pump thetester handle onetime persecond.
2. Check thespray pattern .
3. Ifthe spray pattern isnot correct, cleanorreplace nozzle.

EC-380

FUELSYSTEM CHECK

2. Check fuelcutsolenoid valveforcircuit continuity.
3. Remove fuelcutsolenoid valveandcheck thatplunger
moves smoothly andthat spring isnormal.

Fuel
CutSolenoid Valve

1. Disconnect fuelcutsolenoid valveharness connector and
check voltage.

Priming
PumpCheck
Before checking primingpump,makesurethatfuel filter is
filled withfuel.

1. Disconnect fuelreturn hose.

Place asuitable container beneathhoseend.

2. Pump priming pumpandcheck thatthefuel overflows from
the hose end.Ifnot, replace priming pump.

•

Voltage
OV

Battery voltage

OFF
ON

Ignition
switch

EC-381

CRANKCASEVENTILATION SYSTEM

SEF157R

l

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Q

Freshair

Ventilation Hose

1. Check hosesandhose connections forleaks.
2. Disconnect allhoses andclean withcompressed air.

If
any hose cannot befreed ofobstructions, replace.

SEC692
EC-382

relay-2ENGINE
ANDEMISSION CONTROLOVERALLSYSTEM
Component PartsLocation
Engine coolant
temperature sensor
Glowplugs
•

EC-383 SEF159R

ENGINEANDEMISSION CONTROLOVERALLSYSTEM
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EC-385