NISSAN ALMERA N16 2001 Electronic Repair Manual

SEM139D
+Using a feeler gauge, measure clearance between valve lifter
and camshaft.
+Record any valve clearance measurements which are out of
specification. They will be used later to determine the required
replacement adjusting shim.
Valve clearance for checking (Hot):
Intake
0.21 - 0.49 mm (0.008 - 0.019 in)
Exhaust
0.30 - 0.58 mm (0.012 - 0.023 in)
SEM923F
5. Turn crankshaft one revolution (360É) and align mark on crank-
shaft pulley with pointer.
6. Check only those valves shown in the figure.
+Use the same procedure as mentioned in step 4.
7. If all valve clearances are within specification, install the fol-
lowing parts:
+Rocker cover
+All spark plugs
SEM941F
ADJUSTINGNJEM0041S02Adjust valve clearance while engine is cold.
1. Turn crankshaft. Position cam lobe upward on camshaft for
valve that must be adjusted.
2. Place Tool (A) around camshaft as shown in figure.
Before placing Tool (A), rotate notch toward center of cylinder
head. (See figure.) This will simplify shim removal later.
CAUTION:
Be careful not to damage cam surface with Tool (A).
SEM924F
3. Rotate Tool (A) so that valve lifter is pushed down.
SEM925F
4. Place Tool (B) between camshaft and valve lifter to retain valve
lifter.
CAUTION:
+Tool (B) must be placed as close to camshaft bracket as
possible.
+Be careful not to damage cam surface with Tool (B).
5. Remove Tool (A).
CYLINDER HEADQG
Valve Clearance (Cont'd)
EM-43

SEM144D
SEM145D
6. Remove adjusting shim using a small screwdriver and a mag-
netic finger.
7. Determine replacement adjusting shim size using the following
formula.
+Use a micrometer to determine thickness of removed shim.
+Calculate thickness of new adjusting shim so valve clearance
comes within specified values.
R = Thickness of removed shim
N = Thickness of new shim
M = Measured valve clearance
Intake:
N=R+[Mþ0.37 mm (0.0146 in)]
Exhaust:
N=R+[Mþ0.40 mm (0.0157 in)]
Shims are available in 50 sizes from 2.00 mm (0.0787 in) to 2.98
mm (0.1173 in), in steps of 0.02 mm (0.0008 in).
AEM236
+Select the closest size shim to the calculated thickness. Refer
to chart in SDS, EM-67.
SEM146D
8. Install new shim using a suitable tool.
+Install with the surface on which the thickness is stamped
facing down.
SEM147D
9. Place Tool (A) as explained in steps 2 and 3.
10. Remove Tool (B).
11. Remove Tool (A).
12. Recheck valve clearance.
Valve clearance:
CYLINDER HEADQG
Valve Clearance (Cont'd)
EM-44

Unit: mm (in)
For adjusting For checking
HotCold* (reference
data)Hot
Intake0.32 - 0.40
(0.013 - 0.016)0.25 - 0.33
(0.010 - 0.013)0.21 - 0.49
(0.008 - 0.019)
Exhaust0.37 - 0.45
(0.015 - 0.018)0.32 - 0.40
(0.013 - 0.016)0.30 - 0.58
(0.012 - 0.023)
*: At a temperature of approximately 20ÉC (68ÉF)
Whenever valve clearances are adjusted to cold specifications, check that
the clearances satisfy hot specifications and adjust again if necessary.
AEM293
AssemblyNJEM00201. Install valve component parts.
+Always use new valve oil seal. Refer to EM-31.
+Before installing valve oil seal, install valve spring seat.
+After installing valve components, tap valve stem tip with
a plastic hammer to assure a proper fit.
+Install valve spring (narrow pitch at both ends of spring)
with either end toward cylinder head.
SEM899F
InstallationNJEM00211. Before installing cylinder head gasket, apply a continuous
bead of liquid gasket to mating surface of cylinder block.
2. Install cylinder head gasket.
+When installing cylinder head with manifolds, use new
cylinder head gasket.
SEM877A
3. Install cylinder head with manifolds.
+Be sure to install washers between bolts and cylinder
head.
+Do not rotate crankshaft and camshaft separately, or
valves will strike piston heads.
+Apply new engine oil to cylinder head bolt threads and
seat surfaces.
CYLINDER HEADQG
Valve Clearance (Cont'd)
EM-45

SEM900F
SEM614EC
SEM901F
+Tightening procedure
a. Tighten bolts to 29 N´m (3 kg-m, 22 ft-lb).
b. Tighten bolts to 59 N´m (6 kg-m, 43 ft-lb).
c. Loosen bolts completely.
d. Tighten bolts to 29 N´m (3 kg-m, 22 ft-lb).
e. Turn bolts 50 to 55 degrees clockwise or if angle wrench
is not available, tighten bolts to 59±4.9 N´m (6±0.5 kg-m,
43±3.6 ft-lb).
f. Tightening bolts (11 - 14) to 6.3 to 8.3 N´m (0.64 to 0.85
kg-m, 55.8 to 73.5 in-lb).
Tightening torque N´m (kg-m, ft-lb)
abcde,f
Bolts
(1-10)29
(3, 22)59
(6, 43)0
(0, 0)29
(3, 22)50-55
degrees or
59±4.9
(6±0.5,
43±3.6
ft-lb)
Bolts
(11-14)ÐÐÐÐ6.3 - 8.3
(0.64 -
0.85, 55.8 -
73.5 in-lb)
4. Install camshaft.
+The camshafts are distinguished by a paint mark as follows.
Intake camshaft: Other paint color than white
Exhaust camshaft: White paint or no paint
SEM902F
+Make sure camshafts are aligned as shown in figure.
SEM903F
5. Install camshaft brackets.
+Make sure camshaft brackets are aligned as marked dur-
ing disassembly.
CYLINDER HEADQG
Installation (Cont'd)
EM-46

SEM904F
+Apply new engine oil to bolt threads and seat surface.
+Tighten camshaft bracket bolts in the following steps.
a. Tighten bolts9-12,then1-8.
2.0 N´m (0.204 kg-m, 17.7 in-lb)
b. Tighten bolts1-12.
5.9 N´m (0.60 kg-m, 52.2 in-lb)
c. Tighten bolts1-12.
9.0 - 11.8 N´m (0.92 - 1.20 kg-m, 80 - 104 in-lb)
+If any part of valve assembly or camshaft is replaced,
check valve clearance according to reference data.
After completing assembly check valve clearance. Refer
to ªCheckingº and ªAdjustingº in ªVALVE CLEARANCEº
(EM-42).
Reference data valve clearance (Cold):
Intake
0.25 - 0.33 mm (0.010 - 0.013 in)
Exhaust
0.32 - 0.40 mm (0.013 - 0.016 in)
SEM905F
6. Install camshaft sprocket.
+Set timing chain by aligning mating marks with those of
camshaft sprockets.
SEM906F
7. Install camshaft sprocket bolts to correct torque.
+Apply new engine oil to bolt threads and seat surface.
SEM907F
8. Install chain tensioner.
+Before installing chain tensioner, insert a suitable pin into
pin hole of chain tensioner.
+After installing chain tensioner, remove the pin.
9. Install timing chain guide.
CYLINDER HEADQG
Installation (Cont'd)
EM-47

SEM887F
10. Install cylinder head front cover.
+Apply liquid gasket to cylinder head front cover.
+Use Genuine Liquid Gasket or equivalent.
SEM889F
11. Install camshaft position sensor (PHASE).
SEM888F
12. Before installing rocker cover, apply a continuous bead of liq-
uid gasket to mating surface of cylinder head.
SEM105G
13. Install rocker cover with rocker cover gasket and tighten bolts
in numerical order as shown in the figure.
14. Install spark plugs.
15. Install ignition coils.
16. Install exhaust manifold.
17. Install intake manifold rear supports.
18. Connect vacuum hoses, fuel hoses, water hose, wire, harness,
connectors and so on.
19. Install front exhaust tube.
20. Install front undercovers.
21. Install air duct to intake manifold collector.
22. Drive belts.
For adjusting drive belt deflection, refer to ªCheckingº, EM-15.
23. Reinstall parts in reverse order of removal.
CYLINDER HEADQG
Installation (Cont'd)
EM-48

Removal and InstallationNJEM0022
YEM017
1. RH engine mounting
2. RH engine mounting bracket
3. LH engine mounting
4. Rear engine mounting bracket5. Rear engine mounting
6. Dynamic damper (Specific models
only)
7. Center member8. Front engine mounting bracket
9. Front engine mounting
ENGINE ASSEMBLYQG
Removal and Installation
EM-49

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-38, 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-17,
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-50

SEM174D
9. Remove the following parts:
+RH and LH front tires
+Splash covers
+RH and LH brake caliper assemblies
Refer to BR-27, ªFRONT DISC BRAKEº.
Brake hose does not need to be disconnected from brake
caliper assembly. Never depress brake pedal.
+RH & LH drive shaft. Refer to AX-10, ªDrive Shaftº.
When removing drive shaft, be careful not to damage tran-
saxle side grease seal.
SEM109G
+Disconnect control rod and support rod from transaxle. (M/T
models.)
Refer to MT-29, ªTRANSAXLE GEAR CONTROLº.
+Disconnect control cable from transaxle. (A/T models.)
Refer to AT-346, ªRemovalº.
SEM108G
+Center member
+Front exhaust tube
+Stabilizer bar
+Cooling fan
+Radiator
+Disconnect wires, harness, pipes, hoses and so on.
10. Lift up engine slightly and disconnect or remove all engine
mountings.
When lifting engine, be sure to clear surrounding parts. Use
special care near brake tubes and brake master cylinder.
11. Remove engine with transaxle as shown.
SEM420D
INSTALLATIONNJEM0022S02+Install in reverse order of removal.
ENGINE ASSEMBLYQG
Removal and Installation (Cont'd)
EM-51

ComponentsNJEM0023
YEM022
1. Oil level gauge guide
2. Cylinder block
3. Rear oil seal retainer
4. Rear oil seal
5. Rear plate
6. Flywheel
7. Drain plug
8. Buffle plate
9. Top ring10. 2nd ring
11. Oil ring
12. Piston
13. Snap ring
14. Piston pin
15. Connecting rod
16. Connecting rod bearing
17. Connecting rod cap
18. Key19. Main bearing
20. Thrust bearing
21. Crankshaft
22. Main bearing cap
23. Knock sensor
24. Crankshaft position sensor (POS)
25. Rear lower plate
26. Drive plate
27. Signal plate
CYLINDER BLOCKQG
Components
EM-52