Nissan Primera P11. Instruction — part 79
Description
●
In this system blow-by gas is sucked into the air inlet pipe
through the control valve after oil separation by the oil sepa-
rator in the rocker cover.
Blow-by Control Valve
●
Check control valve for clogging and abnormalities.
Ventilation Hose
1. Check hoses and hose connections for leaks.
2. Disconnect all hoses and clean with compressed air.
If any hose cannot be freed of obstructions, replace.
SEF851S
Blow-by control
valve
FRESH AIR
BLOW BY
GAS
Baffle plate
SEC586B
Blow-by control valve
Rocker cover
Intake
manifold
SEC692
CRANKCASE VENTILATION SYSTEM
CD20T
EC-21
CAUTION:
●
Do not disassemble injection nozzle assembly. Entrust
disassembly or adjustment to BOSCH service shop.
●
Plug flare nut with a cap or rag so that no dust enters the
nozzle.
Removal and Installation
1. Remove fuel injection tube and spill tube.
2. Remove injection nozzle assembly.
Also remove gasket from nozzle end.
3. Install injection nozzle in the reverse order of removal.
Injection nozzle to engine:
: 59 - 69 N·m (6.0 - 7.0 kg-m, 43 - 51 ft-lb)
Injection nozzle to tube:
: 22 - 25 N·m (2.2 - 2.5 kg-m, 16 - 18 ft-lb)
Spill tube:
: 39 - 49 N·m (4.0 - 5.0 kg-m, 29 - 36 ft-lb)
a. Always clean the nozzle holes.
b. Always use new injection nozzle gasket.
c. Note that small washer should be installed in specified
direction.
d. Bleed air from fuel system.
Test and Adjustment
WARNING:
When using nozzle tester, be careful not to allow diesel fuel
sprayed from nozzle to contact your hands or body, and
make sure your eyes are properly protected with goggles.
INJECTION PRESSURE TEST
1. Install nozzle to injection nozzle tester and bleed air from
flare nut.
NEF396
Nozzle side
Combustion
chamber side
NEF774
No. 1 injection nozzle
EF791A
INJECTION NOZZLE
CD20T
EC-22
2. Pump the tester handle slowly (one time per second) and
watch the pressure gauge.
3. Read the pressure gauge when the injection pressure just
starts dropping.
Initial injection pressure:
Used
14,423 - 15,651 kPa
(144.2 - 156.5 bar,
148 - 159 kg/cm
2
, 2,091 - 2,269 psi)
New
15,000 - 16,000 kPa
(150.0 - 160.0 bar,
153 - 163 kg/cm
2
, 2,175 - 2,320 psi)
Always check initial injection pressure using a new nozzle.
If the pressure is not correct, replace nozzle assembly.
LEAKAGE TEST
1. Maintain the pressure at about 981 to 1,961 kPa (9.8 to 19.6
bar, 10 to 20 kg/cm
2
, 142 to 284 psi) below initial injection
pressure.
2. Check that there is no dripping from the nozzle tip or around
the body.
3. If there is leakage, replace nozzle.
SPRAY PATTERN TEST
1. Check spray pattern by pumping tester handle one full stroke
per second.
a. If main spray angle is within 30 degrees as shown, injec-
tion nozzle is good.
b. It is still normal even if a thin stream of spray deviates
from the main spray (pattern B).
2. Test again and if spray pattern is not corrected, replace
nozzle.
SEF672A
SEF674A
Good
Faulty
SEF079S
INJECTION NOZZLE
CD20T
Test and Adjustment (Cont’d)
EC-23
p
1
Rear back cover
p
2
Injection pump sprocket
p
3
Injection pump bracket
p
4
Water connector
p
5
Bracket
p
6
Bracket
p
7
Electronic fuel injection pump
p
8
Key
Removal
1. Remove battery.
Disconnect electronic injection pump harness connectors.
2. Set No. 1 piston at TDC on its compression stroke.
TDC: Crankshaft pulley notch without painted mark
3. Remove fuel hoses (supply, return and spill) and injection
tubes.
4. Remove air duct and injection pump timing belt cover.
5. Remove injection pump timing belt.
Refer to EM section (“Injection Pump Timing Belt”).
6. Remove injection pump sprocket with Tool.
●
Remove key from injection pump shaft and store safely.
NEF777
6.3 - 8.2 (0.64 - 0.84, 55.6 - 72.9)
59 - 69 (6.0 - 7.0, 43 - 51)
31 - 37 (3.2 - 3.8, 23 - 27)
: N·m (kg-m, in-lb)
: N·m (kg-m, ft-lb)
16 - 21 (1.6 - 2.1, 12 - 15)
16 - 21
(1.6 - 2.1, 12 - 15)
24 - 27
(2.4 - 2.8, 17 - 20)
6.3 - 8.3 (0.64 - 0.85, 55.6 - 73.8)
13 - 18
(1.3 - 1.8, 9 - 13)
49 - 59
(5.0 - 6.0, 36 - 43)
24 - 27 (2.4 - 2.8, 17 - 20)
Front of engine
SEF655S
Injection timing mark
(Yellow painted mark)
TDC (Without painted mark)
SEF656S
ELECTRONIC FUEL INJECTION PUMP
CD20T
EC-24
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