2001 NISSAN ALMERA oil pressure

NJEM0007
1. Warm up engine.
2. Turn ignition switch OFF.
3. Release fuel pressure.
Refer to EC-40, ªReleasing Fuel Pressureº.
4. Remove ignition coils.
5. Remove spark plugs.
+Clean area around plug with compressed air before removing
the spark plug.
SEM973E
AEM308
6. Attach a compression tester to No. 1 cylinder.
7. Depress accelerator pedal fully to keep throttle valve wide
open.
8. Crank engine and record highest gauge indication.
9. Repeat the measurement on each cylinder as shown above.
+Always use a fully-charged battery to obtain specified
engine speed.
Compression pressure: kPa (bar, kg/cm
2, psi)/rpm
Except for QG15DE
Standard
1,324 (13.24, 13.5, 192)/350
Minimum
1,128 (11.28, 11.5, 164)/350
Maximum allowable difference between cylinders
98 (0.98, 1.0, 14)/350
QG15DE
Standard
1,372 (13.720, 13.99, 198.9)/350
Minimum
1,176 (11.759, 11.99, 170.5)/350
Maximum allowable difference between cylinders
98 (0.98, 1.0, 14)/350
10. If cylinder compression in one or more cylinders is low, pour a
small amount of engine oil into the cylinder through the spark
plug hole and retest compression.
+If adding oil improves cylinder compression, piston rings
may be worn or damaged. If so, replace piston rings after
checking piston.
+If pressure stays low, a valve may be sticking or seating
improperly. Inspect and repair valve and valve seat. Refer
to SDS, EM-71. If valve or valve seat is damaged
excessively, replace them.
+If compression in any two adjacent cylinders is low and if add-
ing oil does not improve compression, there is leakage past the
gasket surface. If so, replace cylinder head gasket.
11. Reinstall spark plugs, ignition coils and fuel pump fuse.
12. Perform ªSelf-diagnosis Procedureº referring to EC-70, ªHow
to Erase DTCº if any DTC appears.
MEASUREMENT OF COMPRESSION PRESSUREQG
EM-15

CAUTION:
+After removing timing chain, do not turn crankshaft and
camshaft separately, or valves will strike piston heads.
+When installing chain tensioner, oil seats, or other sliding
parts, lubricate contacting surfaces with new engine oil.
+Apply new engine oil to bolt threads and seat surfaces
when installing camshaft sprocket and crankshaft pulley.
+When removing oil pump assembly, remove camshaft
position sensor (PHASE), then remove timing chain from
engine.
+Be careful not to damage sensor edges.
SEM869F
RemovalNJEM01051. Drain engine coolant from radiator and cylinder block.
Be careful not to spill coolant on drive belts.
2. Remove reservoir tank.
3. Release fuel pressure.
Refer to EC-40, ªFuel Pressure Releaseº.
4. Remove the following belts.
+Power steering pump drive belt
+Alternator drive belt
5. Remove front right-side wheel.
6. Remove front/right splash undercover.
7. Remove front exhaust tube.
SEM870F
8. Remove vacuum hoses, fuel hoses, and so on.
9. Remove ignition coils.
10. Remove spark plugs.
SEM102G
11. Remove rocker cover bolts in numerical order as shown in the
figure.
TIMING CHAINQG
Components (Cont'd)
EM-24

CAUTION:
+When installing camshaft and oil seal, lubricate contacting
surfaces with new engine oil.
+When tightening cylinder head bolts, camshaft sprocket
bolts and camshaft bracket bolts, lubricate bolt threads
and seat surfaces with new engine oil.
+Attach tags to valve lifters so as not to mix them up.
SEM869F
RemovalNJEM00171. Drain engine coolant from radiator and cylinder block.
Be careful not to spill coolant on drive belts.
2. Release fuel pressure.
Refer to EC-40, ªFuel Pressure Releaseº.
3. Remove drive belts.
4. Remove air duct to intake manifold collector.
5. Remove front undercovers.
6. Remove front exhaust tube.
SEM870F
7. Disconnect vacuum hoses, fuel hoses, water hoses, wires,
harness, connectors and so on.
8. Remove intake manifold rear supports.
9. Remove exhaust manifold.
10. Remove ignition coils.
11. Remove spark plugs.
SEM102G
12. Remove rocker cover bolts in numerical order as shown in the
figure.
SEM872F
13. Set No. 1 piston at TDC on its compression stroke.
CYLINDER HEADQG
Components (Cont'd)
EM-35

WARNING:
+Position vehicle on a flat and solid surface.
+Place chocks at front and back of rear wheels.
+Do not remove engine until exhaust system has com-
pletely cooled off, otherwise, you may burn yourself
and/or fire may break out in fuel line.
+Before disconnecting fuel hose, release pressure.
Refer to EC-40, ªFuel Pressure Releaseº.
+Be sure to lift engine and transaxle in a safe manner.
+For engines not equipped with engine slingers, attach
proper slingers and bolts described in PARTS CATALOG.
CAUTION:
+When lifting engine, be sure to clear surrounding parts.
Use special care near accelerator wire casing, brake lines
and brake master cylinder.
+When lifting the engine, always use engine slingers in a
safe manner.
+When removing drive shaft, be careful not to damage
grease seal of transaxle.
+Before separating engine and transaxle, remove crank-
shaft position sensor (POS) from the cylinder block
assembly.
+Always be extra careful not to damage edge of crankshaft
position sensor (POS), or signal plate teeth.
Engine cannot be removed separately from transaxle. Remove
engine with transaxle as an assembly.
REMOVALNJEM0022S011. Drain coolant from radiator and cylinder block. Refer to LC-18,
ªChanging Engine Coolantº.
2. Remove coolant reservoir tank and bracket.
3. Drain engine oil.
4. Remove battery and battery tray.
5. Remove air cleaner and air duct.
6. Remove drive belts.
7. Remove alternator and air conditioner compressor from
engine.
8. Remove power steering oil pump from engine and position
aside.
Power steering oil pump does not need to be disconnected
from power steering tubes.
ENGINE ASSEMBLYQG
Removal and Installation (Cont'd)
EM-52

General SpecificationsNJEM0028
EngineQG15DE QG18DE
ClassificationGasoline
Cylinder arrangement4, in-line
Displacement
cm
3(cu in)1,497 (91.35) 1,769 (107.94)
Bore´stroke
mm (in)73.6´88.0 (2.898´3.465) 80.0´88.0 (3.150´3.465)
Valve arrangementDOHC
Firing order1-3-4-2
Number of piston ringsCompression 2
Oil 1
Number of main bearings5
Compression ratio9.9 9.5
EM120
abcde f
Valve timingQG18DE with intake
valve timing control222É 236É 0É (20É) 56É (36É) þ2É 44É
Except for QG18DE
with intake valve tim-
ing control222É 222É 0É 42É þ2É 44É
( ): Valve timing control ON
Compression PressureNJEM0029Unit: kPa (bar, kg/cm2, psi)/350 rpm
Standard1,324 (13.24, 13.5, 192)
1,372 (13.720, 13.99, 198.9)*
Minimum1,128 (11.28, 11.5, 164)
1,176 (11.759, 11.99, 170.5)*
Difference limit between cylinders 98 (0.98, 1.0, 14)
*: For QG15DE
SERVICE DATA AND SPECIFICATIONS (SDS)QG
General Specifications
EM-66

SEM270G
Rotor ShaftNJEM0104S0201+Check that the rotor shaft rotates smoothly without any resis-
tance when it is rotated by your fingertips.
+Check that the rotor shaft is not loose when it is moved verti-
cally or horizontally.
Standard value for rotor shaft oil clearance:
0.086 - 0.117 mm (0.0034 - 0.0046 in)
SEM271G
Rotor Shaft End PlayNJEM0104S0202Place a dial gauge at the rotor shaft end in the axial direction to
measure the end play.
Standard: 0.036 - 0.090 mm (0.0014 - 0.0035 in)
SEM272G
Turbine WheelNJEM0104S0203+Check that there is no oil adhesion.
+Check that there is no carbon accumulation.
+Check that blades of the turbine wheel are not bent or broken.
+Check that the turbine wheel does not interfere with the turbine
housing.
SEM273G
Compressor WheelNJEM0104S0204+Check that there is no oil adhesion inside the air inlet.
+Check that the compressor wheel does not interfere with the
compressor housing.
+Check that the wheel is not bent or broken.
SEM274G
Wastegate Valve ActuatorNJEM0104S0205+Connect the handy pump to the actuator, and check that the
rod strokes smoothly in compliance with the following pres-
sure.
+Pressure to be applied at actuator part to move rod end as
follows:
Standard (Pressure/rod stroke amount):
115.44 - 120.76 kPa (1,154 - 1,208 mbar, 866.0 - 906.0
mmHg, 34.1 - 35.7 inHg)/0.38 mm (0.0150 in)
140.54 - 149.86 kPa (1,405 - 1,498 mbar, 1,054.3 -
1,124.2 mmHg, 41.5 - 44.3 inHg)/4.0 mm (0.157 in)
EXHAUST MANIFOLD, TURBOCHARGERYD
Inspection (Cont'd)
EM-115

CAUTION:
+When installing camshafts, chain tensioners, oil seals, or
other sliding parts, lubricate contacting surfaces with new
engine oil.
+Apply new engine oil to threads and seat surfaces when
installing cylinder head, camshaft sprocket, crankshaft
pulley, and camshaft bracket.
+Attach tags to valve lifters so as not to mix them up.
RemovalNJEM0063PREPARATIVE WORKNJEM0063S011. Drain engine coolant. Refer to LC-44, ªChanging Engine Cool-
antº.
2. Remove exhaust manifold. Refer to EM-112, ªRemovalº.
3. Remove intake manifold. Refer to EM-108, ªRemovalº.
+Apply paint to camshaft sprockets for alignment during
installation.
JEM152G
CAMSHAFTNJEM0063S021. Remove the following parts:
+Rocker cover
+Vacuum pump and cylinder head rear cover assembly
+Spill tube
+High pressure injection nozzle assembly
+Secondary timing chain and associated parts
JEM159G
2. Remove camshaft sprockets.
+Holding the hexagonal part of the camshaft with a wrench
having 21 mm (0.83 in) width between facing flats, loosen the
bolt holding the camshaft sprocket.
JEM160G
3. Remove camshafts.
+Loosen bolts holding the camshaft bracket in several stages in
the reverse order of that shown in the figure, and remove them.
4. Remove adjusting shims and valve lifters.
+Confirm the correct location of each part removed. Store them
so they do not get mixed up.
+For re-installation, be sure to put mark on camshaft
bracket before removal.
CYLINDER HEADYD
Components (Cont'd)
EM-120

SEM008A
VALVE GUIDE REPLACEMENTNJEM0065S09+When a valve guide is removed, replace with an oversized [0.2
mm (0.008 in)] valve guide.
1. To remove valve guide, heat cylinder head to 110 to 130ÉC
(230 to 266ÉF) by soaking in heated oil.
SEM931C
2. Drive out valve guide with a press [under a 20 kN (2 ton, 2.2
US ton, 2.0 Imp ton) pressure] or hammer and suitable tool.
SEM932C
3. Ream cylinder head valve guide hole.
Valve guide hole diameter (for service parts):
10.175 - 10.196 mm (0.4006 - 0.4014 in)
JEM156G
4. Heat cylinder head to 110 to 130ÉC (230 to 266ÉF) and press
service valve guide onto cylinder head.
Projection ªLº:
10.4 - 10.6 mm (0.409 - 0.417 in)
5. Ream valve guide.
Finished size:
6.000 - 6.018 mm (0.2362 - 0.2369 in)
CYLINDER HEADYD
Inspection (Cont'd)
EM-125