2007 NISSAN TIIDA low oil pressure

EM-212
< DISASSEMBLY AND ASSEMBLY >[MR18DE]
ENGINE UNIT
Disassembly and Assembly
INFOID:0000000001337812
DISASSEMBLY
1. Remove engine and transaxle assembly from vehicle, separate transaxle from engine. Refer to EM-207.
2. Install engine to engine stand as follows;
a. Remove flywheel.
 Secure flywheel using Tool (A), and remove bolts.
CAUTION:
Be careful not to damage or scratch contact surface for
clutch disc of flywheel.
b. Lift the engine with a hoist to install it onto widely use engine stand.
CAUTION:
 Use the engine stand that has a load capacity [approximately 135 kg (298 lb) or more] large
enough for supporting the engine weight.
 If the load capacity of stand is not adequate, remove the following parts beforehand to reduce the poten-
tial risk of overturning stand.
- Exhaust manifold; Refer to EM-159
.
- Rocker cover; Refer to EM-173, "
Removal and Installation".
NOTE:
The figure shows an example of widely used engine stand (A)
that can support mating surface of transaxle with flywheel
removed.
CAUTION:
Before removing the hanging chains, make sure the engine
stand is stable and there is no risk of overturning.
3. Remove oil pan (upper and lower). Refer to EM-166
.
4. Remove cylinder head. Refer to EM-198, "
Removal and Installation".
5. Remove thermostat housing. Refer to CO-45, "
Removal and Installation".
6. Remove knock sensor.
CAUTION:
1. Cylinder block 2. O-ring 3. Crankshaft position sensor (POS)
4.Crankshaft position sensor (POS)
cover5.Oil filter (for intake valve timing con-
trol)6. Knock sensor
7. Oil pressure switch 8. Top ring 9. Second ring
10. Oil ring 11. Snap ring 12. Piston
13. Piston pin 14. Connecting rod 15. Thrust bearing
16. Connecting rod bearing upper 17. Main bearing upper 18. Crankshaft key
19. Main bearing lower 20. Connecting rod bearing lower 21. Connecting rod bearing cap
22. Connecting rod bolt 23. Main bearing cap 24. Main bearing cap bolt
25. Crankshaft 26. Signal plate 27. Rear oil seal
28. Flywheel
A. Refer to EM-212
Tool number : KV 11105210 (J-44716)
AWBIA011 7ZZ
PBIC3227J

EM-252
< PRECAUTION >[K9K]
PRECAUTIONS
3. Disconnect both battery cables. The steering lock will remain released and the steering wheel can be
rotated.
4. Perform the necessary repair operation.
5. When the repair work is completed, return the ignition switch to the ″LOCK″ position before connecting
the battery cables. (At this time, the steering lock mechanism will engage.)
6. Perform a self-diagnosis check of all control units using CONSULT-III.
Precaution for Drain CoolantINFOID:0000000001381450
Drain coolant when engine is cooled.
Precaution for Disconnecting Fuel PipingINFOID:0000000001381451
 Before starting work, make sure no fire or spark producing items are in the work area.
 Release fuel pressure before disassembly.
 After disconnecting pipes, plug openings to stop fuel leakage.
Precaution for Removal and DisassemblyINFOID:0000000001381452
 When instructed to use special service tools, use the specified tools. Always be careful to work safely, avoid
forceful or uninstructed operations.
 Exercise maximum care to avoid damage to mating or sliding surfaces.
 Cover openings of engine system with tape or the equivalent, if necessary, to seal out foreign materials.
 Mark and arrange disassembly parts in an organized way for easy troubleshooting and re-assembly.
 When loosening nuts and bolts, as a basic rule, start with the one furthest outside, then the one diagonally
opposite, and so on. If the order of loosening is specified, do exactly as specified.
Precaution for Inspection, Repair and ReplacementINFOID:0000000001381453
Before repairing or replacing, thoroughly inspect parts. Inspect new replacement parts in the same way, and
replace if necessary.
Precaution for Assembly and InstallationINFOID:0000000001381454
 Use torque wrench to tighten bolts or nuts to specified value.
 When tightening nuts and bolts, as a basic rule, equally tighten in several different steps starting with the
ones in center, then ones on inside and outside diagonally in this order. If the order of tightening is specified,
do exactly same as specified.
 Replace with new gasket, packing, oil seal or O-ring.
 Thoroughly wash, clean, and air-blow each part. Carefully check oil or coolant passages for any restriction
and blockage.
 Avoid damaging sliding or mating surfaces. Completely remove foreign materials such as cloth lint or dust.
Before assemble, spread the oil on sliding surfaces well.
 Release air within route when refilling after draining coolant.
 Before starting engine, apply fuel pressure to fuel lines with turning ignition switch ON (with engine stopped).
Then make sure that there are no leaks at fuel line connections.
 After repairing, start engine and increase engine speed to check coolant, fuel, oil, and exhaust systems for
leakage.
Parts Requiring Angular TighteningINFOID:0000000001381455
 Use an angle wrench for the final tightening of the following engine parts.
- Cylinder head bolts
- Lower cylinder block bolts
- Connecting rod cap bolts
- Crankshaft pulley bolt (No angle wrench is required as the bolt flange is provided with notches for angular
tightening)
 Do not use a torque value for final tightening.
 The torque value for these parts are for a preliminary step.
 Ensure thread and seat surfaces are clean and coated with engine oil.

EM-254
< PRECAUTION >[K9K]
PRECAUTIONS
The system is very sensitive to contamination. The risks caused by the introduction of contamination are: Damage or destruction of the high pressure injection system and the engine,
 Seizing or leaking of a component.
All After-Sales operations must be performed under very clean conditions. This means that no impurities (par-
ticles a few microns in size) get into the system during dismantling or into the circuits via the fuel unions.
The cleanliness principle must be applied from the filter to the injectors.
WHAT ARE THE SOURCES OF CONTAMINATION?
Contamination is caused by:
 Metal or plastic chips,
 Paint,
Fibres:
- Boxes,
- Brushes,
- Paper,
- Clothing,
- Cloths,
 Foreign bodies such as hair,
 Ambient air,
Etc.
IMPORTANT: It is not possible to clean the engine using a high pressure washer because of the risk of dam-
aging connections. In addition, moisture may collect in the connectors and create electrical connection mal-
functions.
INSTRUCTIONS TO BE FOLLOWED BEFORE ANY WORK IS CARRIED OUT ON THE INJECTION SYS-
TEM
 Ensure that you have the plugs for the unions to be opened (bag of plugs sold at the Parts Stores - Nissan
part No.: 16609 00Q0B, Renault part No.: 77 01 476 857). Plugs are to be used once only. After use, they
must be thrown away (once used they are soiled and cleaning is not sufficient to make them reusable).
Unused plugs must be thrown away.
 Ensure that you have hermetically resealable plastic bags for storing removed parts. Stored parts will there-
fore be less subject to the risk of impurities. The bags must be used only once, and after use they must be
thrown away.
 Lint-free towelettes to be used for high pressure supply pump related service purpose. The use of a normal
cloth or paper for cleaning purposes is forbidden. These are not lint-free and may contaminate the fuel circuit
of the system. Each lint-free cloth should only be used once.
INSTRUCTIONS TO BE FOLLOWED BEFORE OPENING THE FUEL CIRCUIT
 For each operation, use new thinner (used thinner contains impurities). Pour it into a clean receptacle.
 For each operation, use a clean brush which is in good condition (the brush must not shed its bristles).
 Use a brush and thinners to clean the connections to be opened.
 Blow compressed air over the cleaned parts (tools, cleaned the same way as the parts, connections and
injection system zone). Check that no bristles remain adhered.
 Wash your hands before and during the operation if necessary.
 When wearing leather protective gloves, cover these with latex gloves.
INSTRUCTIONS TO BE FOLLOWED DURING THE OPERATION
 As soon as the circuit is open, all openings must be plugged to prevent impurities from entering the system.
The plugs to be used are available from the Parts Stores - Nissan part No.: 16609 00Q0B, Renault part No.:
77 01 476 857. They must not, under any circumstances, be reused.
 Close the hermetically sealed bag, even if it has to be reopened shortly afterwards. Ambient air carries con-
tamination.
 All components of the injection system that are removed must be stored in a hermetically sealed plastic bag
once the plugs have been inserted.
 The use of a brush, thinner, bellows, sponge or normal cloth is strictly forbidden once the circuit has been
opened. These items are likely to allow impurities to enter the system.
 A new component replacing an old one must not be removed from its packaging until it is to be fitted to the
vehicle.
Instructions for Fitting the Plugs
Nissan part number: 16609 00Q0B

EM-256
< PRECAUTION >[K9K]
PRECAUTIONS
SPECIAL FEATURES
CAUTION:
 The engine must not operate with:
- Diesel engine fuel containing more than 10% diester,
- Petrol, even in tiny quantities.
 The system can inject the diesel into the engine at a pressure up to 1400 bars. Before carrying out
any work, check that the injector rail is not under pressure and that the fuel temperature is not too
high.
 You must respect the cleaning and safety advice specified in this document for any work on the high
pressure injection system.
 Removal of the interior of the pump and injectors is prohibited. Only the flow actuator, the fuel tem-
perature sensor and the venturi can be replaced.
 For safety reasons, it is strictly forbidden to slacken a injection tube union when the engine is run-
ning.
 It is not possible to remove the pressure sensor from the fuel rail because this may cause circuit
contamination malfunctions. If the pressure sensor fails, the pressure sensor, the rail and the five
injection tubes must be replaced.
 It is strictly forbidden to remove any high pressure supply pump pulley marked number 070 575. If
the pump is being replaced, the pulley must be replaced.
 It is forbidden to repair the wiring connecting the knock sensor (accelerometer) and the CKP sensor
(engine speed sensor). If the wiring should fail, it has to be replaced with new wiring.
 Applying 12 volts directly to any component in the system is prohibited.
 Ultrasonic carbon removal and cleaning are prohibited.
 Never start the engine without the battery being connected correctly.
 It is essential to replace all the disconnected air inlet plastic pipes.
INSTRUCTIONS FOR INJECTION TUBES
CAUTION:
All the injection tube removed must be systematically replaced along with the clips.
TIGHTENING THE INJECTION TUBES
NOTE:
fit the pump/rail pipe before the rail/injector pipes.
Rail-pump pipe
 Undo the rail,
 Grease the threads of the injection tube nuts,
 Insert the injection tube olive into the taper of the high pressure pump outlet,
 Insert the injection tube olive into the taper of the high pressure rail inlet.
 Move the nut into position by hand, on the rail side then the pump side,
 Tighten the rail,
 Tighten the injection tube nuts on the rail side then on the pump side.
Rail/injector pipes
 Undo the rail,
 Grease the threads of the injection tube nuts,
 Insert the injection tube olive into the taper of the high pressure injector inlet,
 Insert the injection tube olive into the taper of the high pressure rail outlet,
 Move the nuts into position by hand, on the injector side then the rail side,
 Tighten the rail,
 Ensure that the new clip, supplied with the new injection tube, is fitted,
 Tighten the nuts of the injection tubes on the injector side first and then on the fuel rail side.
NOTE:
Before fitting a new injection tube, move back the nuts on the pipe then lightly lubricate the nut
threads with the oil from the sachet provided in the parts kit.
CHECKING SEALING AFTER REPAIR
CAUTION:
After any operation, check that there are no diesel leaks.
 Reprime the circuit using the priming pump.
 Start the engine and allow to warm up at idle speed, visually inspecting for any fuel leaks.
 Apply tracing fluid around the high pressure connections of the pipe that has been replaced.
 Once the engine coolant temperature is above 50°C and provided there are no malfunctions present, carry
out a road test, taking the engine speed up to 4000 rpm at least once to check that there are no leaks.
 Perform a visual inspection after the road test to make sure that there are no high pressure leaks.
 Clean off the tracing fluid.

COMPRESSION PRESSURE
EM-267
< ON-VEHICLE MAINTENANCE >[K9K]
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COMPRESSION PRESSURE
InspectionINFOID:0000000001381466
1. Warm up engine thoroughly. Then stop.
2. Remove glow plug.
3. Disconnect high-pressure supply pump harness connector to avoid fuel injection during measurement.
4. Connect compression gauge attachment hose [SST:
KV113B0400 (Mot. 1592)] (A) to the hole for glow plug.
5. Connect compression gauge (B) to attachment hose (A).
6. Turn ignition switch to START for cranking and check compres-
sion gauge.
7. Perform the same procedure for the other cylinders.
 If compression pressure is below minimum value, check valve
clearances and parts associated with combustion chamber (valve, valve seat, piston, piston ring, cylin-
der bore, cylinder head, cylinder head gasket). After checking, measure compression pressure again.
 If any cylinder has low compression pressure, pour a small amount of engine oil into the glow plug hole
of the cylinder to re-check it for compression.
- If the added engine oil improves the compression, piston rings may be worn out or damaged. Check pis-
ton rings and replace if necessary.
- If the compression pressure remains at low level despite the addition of engine oil, valves may be mal-
functioning. Check valves for damage. Replace valve or valve seat accordingly.
 If two adjacent cylinders have respectively low compression pressure and their compression remains
low even after the addition of engine oil, cylinder head gaskets are leaking. In this case, replace cylinder
head gaskets.
8. Disconnect compression gauge (B) and attachment hose (A).
9. After inspection is completed, install removed parts.
10. Start the engine, and make sure that the engine runs smoothly.
11. Perform trouble diagnosis. If DTC appears, erase it. Refer to EC-1043, "
BASIC INSPECTION : Descrip-
tion". Compres-
sion pres-
sure: Refer to EM-333,
"GeneralSpecification".
E1BIA0052ZZ

INJECTION TUBE AND FUEL INJECTOR
EM-281
< ON-VEHICLE REPAIR >[K9K]
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INJECTION TUBE AND FUEL INJECTOR
Exploded ViewINFOID:0000000001381490
Removal and InstallationINFOID:0000000001381491
REMOVAL
CAUTION:
 Be sure to read “Precautions for Diesel Equipment”. Refer to EM-253, "
Precaution for Diesel Equip-
ment".
 Wait until the fuel temperature drops before carrying out any work.
 Order the special high pressure injection circuit plug kit.
 Never open an injector. If you open an injector by mistake, you will have to change it.
This is because of the manufacturing and installation tolerances and because there is a risk of con-
taminating the inside of the injector.
 The rod filter of the injector must not be removed.
NOTE:
It is possible to replace a single injection tube.
1. Disconnect the battery.
2. Remove the air duct (inlet). Refer to EM-269, "
Exploded View".
3. Remove engine cover. Refer to EM-270, "
Removal and Installation".
4. Remove charge air cooler hose and pipes. Refer to EM-270, "
Exploded View".
5. Remove oil level gauge guide and plug the hole.
1. Spill hose 2. Injection tube 3. Fuel injector
4. Heat protection washer 5. Fuel injector bracket 6. Fuel injector bracket spacer
7. Fuel rail stud bolt 8. Fuel rail 9. High pressure pipes protection cover
(lower)
10. Injection tube 11. High pressure supply pump 12. High pressure pipes protection cover
(upper)
13. Oil level gauge guide
E1BIA0018GB

EM-282
< ON-VEHICLE REPAIR >[K9K]
INJECTION TUBE AND FUEL INJECTOR
6. Remove fuel hose shield.
7. Disconnect fuel feed hose.
8. Remove high pressure pipes protection cover (upper).
9. Remove the neck located on the fuel rail.
NOTE:
Undo the nut on the pump side or the injector side, then the nut located on the rail side. Undo the
nuts for each pipe in turn. Move the nut along the pipe keeping the olive in contact with the taper.
10. Remove all the injection tubes.
11. Plug all the holes in the injection circuit.
12. Remove fuel rail.
13. Disconnect fuel return pipe.
14. Remove retaining clip and disconnect the diesel return pipe on
the injector.
15. Plug all the holes of the injection circuit.
16. Disconnect the injector harness connector (1).
17. Remove the injector bracket (2).
18. Remove the injector.
19. Pull off the flame shield washer.
20. Disconnect the fuel pressure sensor.
21. Remove the high pressure pipes protection cover (lower).
INSTALLATION
CAUTION:
All the injection tubes removed must be systematically replaced.
1. Clean the injector sockets and the injector bodies, as well as their brackets using a lint-free cloth (use the
wipes recommended for this purpose, dipped in clean solvent.
2. Dry off using a different new wipe.
3. Replace the flame shield washer with a new one.
4. Position the injector.
5. Tighten the mounting bracket bolts.
6. Install injection tubes with new one.
7. Finger tighten the nuts.
8. Before fitting the new injection tubes, lightly lubricate the nut threads with the oil from the sachet provided
in the new parts kit.
NOTE:
Fit the pump/rail pipe before the rail/injector tubes.
9. Fit the pump-rail injection tube as follows:
 Remove the protective plugs from the high pressure pump outlet, the high pressure rail inlet and the
pipe.
E1BIA0049ZZ
MBIB9030E
: 30.0 N·m (3.1 kg-m, 22 ft-lb)

HIGH PRESSURE SUPPLY PUMP
EM-287
< ON-VEHICLE REPAIR >[K9K]
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HIGH PRESSURE SUPPLY PUMP
Exploded ViewINFOID:0000000001381495
Removal and InstallationINFOID:0000000001381496
REMOVAL
CAUTION:
 Be sure to read “Precautions for Diesel Equipment”. Refer to EM-253, "
Precaution for Diesel Equip-
ment".
 Wait until the fuel temperature drops before carrying out any work.
 Order the special high pressure injection circuit plug kit.
 It is strictly forbidden to remove any high pressure supply
pump sprocket marked number 070 575 (see diagram). If the
pump is being replaced, the pulley must be replaced.
1. Disconnect the battery.
2. Remove air duct (inlet). Refer to EM-269, "
Exploded View".
3. Remove engine cover.
4. Remove blow-by hose.
5. Remove charge air cooler hose and pipes. Refer to EM-270,
"Exploded View".
6. Remove the RH front tire. Refer to WT-6, "
Rotation".
7. Remove fender protector (RH). Refer to EXT-22, "
Removal and
Installation".
8. Remove drive belt. Refer to EM-263, "
Removal and Installation".
9. Support the engine using suitable tool.
10. Remove the timing belt. Refer to EM-291, "
Removal and Installation".
11. Remove the oil level gauge guide and plug the hole. Refer to EM-281, "
Exploded View".
12. Remove high pressure pipes protection cover (upper). Refer to EM-281, "
Exploded View".
13. Carefully disconnect:
 The connectors from the flow actuator,
 The connectors from the fuel temperature sensor,
 On the pump, the fuel supply and return pipes.
 The return pipe connecting the injectors with the pump.
14. Remove the injection tube connecting the pump to the rail. Refer to EM-281, "
Removal and Installation".
1. High pressure supply pump protec-
tor2. Stud bolt 3. High pressure supply pump
4. Engine cover bracket
E1BIA0119GB
MBIB9036E