Nissan Terrano r20e. Instruction — part 97
Installation
I
Install the injection tubes, referring to the markings made dur-
ing removal.
I
Install the injection tubes in the order of No. 3, No. 4, No. 1, and
No. 2.
Injection nozzle oil seal
Removal
Using a tool such as a flat-bladed screwdriver, pry the flange of the
seal, then remove it.
Installation
After the injection nozzle assembly is installed, push the seal from
the cylinder head side until it contacts the flange.
I
Replace the oil seal with new one when the injection nozzle
assembly is removed. (It is not necessary to replace the oil
seal when only injection tubes are removed.)
Spill tube
Installation
I
After the spill tube is installed, check the airtightness of
the spill tube.
I
After the bolts are tightened, the joint of the spill tube gasket
might be broken. However, this will not affect function.
Injection nozzle assembly
Removal
1. Remove the nozzle support, then pull out the injection nozzle
assembly by turning it clockwise/counterclockwise.
2. Using a tool such as a flat-head screwdriver, remove the cop-
per washer inside the cylinder head.
CAUTION:
Do not disassemble the injection nozzle.
Installation
1. Insert the nozzle gasket to the cylinder head hole.
2. Attach the O-ring to the mounting groove of the nozzle side,
then insert it in the cylinder head.
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.
JEF248Z
JEF249Z
BASIC SERVICE PROCEDURE
ZD30DDTi
Injection Tube and Injection Nozzle (Cont’d)
EC-25
Inspection for spill tube airtightness
Before the rocker cover is installed, perform the inspection as fol-
lows.
1. Connect the handy vacuum pump to the spill hose.
2. Check that the airtightness is maintained after the negative
pressure shown below is applied.
Standard:
−53.3 to −66.7 kPa (−533 to −667 mbar, −400 to
−500 mmHg, −15.75 to −19.69 inHg)
Air bleeding of fuel piping
After the repair, bleed air in the piping by pumping the priming
pump up and down until it becomes heavy.
Injection pressure test
1. Install injection nozzle assembly to injection nozzle tester and
bleed air from flare nut.
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
19,026 kPa (190.3 bar, 194 kg/cm
2
, 2,759 psi)
New
19,516 - 20,497 kPa (195.2 - 205.0 bar, 199 - 209
kg/cm
2
, 2,830 - 2,972 psi)
Limit
16,182 kPa (161.8 bar, 165 kg/cm
2
, 2,346 psi)
I
The injection nozzle assembly has a 2-stage pressure injection
function. However, the judgement should be made at the first
stage of the valve opening pressure.
JEF250Z
MEC991D
JEF348Y
BASIC SERVICE PROCEDURE
ZD30DDTi
Injection Tube and Injection Nozzle (Cont’d)
EC-26
Spray pattern test
1. Check spray pattern by pumping tester handle one full stroke
per second.
NG spray pattern:
Does not inject straight and strong (B in the fig-
ure).
Fuel drips (C in the figure).
Does not inject evenly (D in the figure).
2. If the spray pattern is not correct, replace injection nozzle
assembly.
Electronic Control Fuel Injection Pump
REMOVAL AND INSTALLATION
CAUTION:
When removing or installing the timing chain as incidental work of the fuel injection pump removal/
installation, always secure the internal mechanism of the idler gear with bolts before removing or
installing the fuel injection pump sprocket. Do not refer to the procedure for “TIMING CHAIN” in EM
section based on No. 1 cylinder compression top dead center. (Unless otherwise specified.)
JEF349Y
JEF259Z
BASIC SERVICE PROCEDURE
ZD30DDTi
Injection Tube and Injection Nozzle (Cont’d)
EC-27
REMOVAL
1. Remove the following:
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Engine coolant draining
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Charge air cooler
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Air inlet pipe
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Throttle body
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Rocker cover
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Oil level gauge guide
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EGR cooler
I
EGR guide tube
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EGR volume control solenoid valve
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Fuel hose
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Injection tube
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Radiator upper hose
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Radiator shroud
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Cooling fan
I
Drive belt
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Vacuum pipe
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Vacuum pump
2. Move the power steering pump.
3. Remove the harness connector from the fuel injection pump.
I
After pulling the connector stopper all the way back, remove the
connector.
I
When the stopper is pulled all the way back, the interlocked-
connector will come off.
As for installation, when the connector is pushed all the way
forward until the stopper locks, the interlocked-connector is
inserted.
4. Remove the fuel injection pump rear bracket.
5. Remove the chain cover.
I
Remove the installation bolts A, B, and C shown in the figure
(left).
CAUTION:
During chain cover removal, seal the opening to prevent for-
eign objects from getting into the engine.
6. Fix the internal mechanism of the idler gear (scissors gear
structure).
a. Remove the plug on the front side of the gear case.
b. While turning the crankshaft pulley clockwise, check the tight-
ening bolt hole of the idler gear internal mechanism through the
plug hole.
I
Conduct the visual check using a mirror.
I
When checking, note that there are 2 other holes (with no
thread) beside the tightening bolt hole on the idler gear.
JEF260Z
JEF261Z
JEF262Z
BASIC SERVICE PROCEDURE
ZD30DDTi
Electronic Control Fuel Injection Pump (Cont’d)
EC-28
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