engine NISSAN ALMERA N15 1995 Service Manual

COMPRESSIONPRESSURE

1. Warm upengine sufficiently.
2. Disconnect injectiontubesonnozzle sideandloosen injec-
tion tubes onpump side.Release clampsoninjection tubes.

• Use twowrenches toprevent delivery holderonpump side
from loosening.

3. Remove spill-tube assembly.

• Toprevent spilltube from breaking, removeitby gripping
nozzle holder.

4. Remove allinjection nozzlesusingasuitable tool.
5. Disconnect fuel-cutsolenoid valveconnector.

EM-115
•

COMPRESSIONPRESSURE

6. Fitcompression gaugetocylinder head.

SEM505D
7.Crank engine andread compression gaugeindication.

Cranking speed:200rpm
Compression pressure:kPa(bar, kg/cm
2,
psi)
Standard
3,138 (31.4, 32,455)

Limit

2,452 (24.5, 25,356)

Limit ofdifference betweencylinders

490 (4.9, 5,71)

8. Ifthe pressure appearslow,pour about 3me (0.11 Impfloz)
of engine oilthrough nozzleholesandrepeat test.
For indications oftest, refer tothe following table.
Gauge indication duringtests Trouble
diagnosis

First
reading Second
reading
Increased
reading
Same reading
maintained
•
Piston ringsareworn ordamaged.
• Iftwo adjacent cylinders arelow, gasket isdamaged .
• Valve issticking .
• Valve seatorvalve contact surface isincorrect.

EM-116

~:Sealing point

SEM894BA
SEM369D OIL
PAN [][]
Installation (Cont'd)

3. Apply liquidgasket tooil pan front oilseal andrear oilseal.
4. Apply acontinuous beadofliquid gasket tomating surface
of oil pan.
• Attaching shouldbedone within 5minutes aftercoating.
5. Install oilpan andtighten boltsinthe order shown inthe
figure.

Wait atleast 30minutes beforerefilling engineoil.
Oil pan bolts:

~: 7-
8 N"m (0.7-0.8 kg-m, 61-69 in-Ib)
EM-119
•

TIMINGBELT
Camshaft TimingBelt
CAUTION:
a. Donot bend ortwist timing belt.
b. After removing timingbelt,donot turn crankshaft andcamshaft separately becausevalveswillstrike
piston heads.
c. Ensure thattiming belt,camshaft sprocket,crankshaft sprocketandbelttensioner areclean andfree
from oiland water.

~: N.m(kg-m, in-Ib)

A:
N.m(kg-m, ft-Ib)
L :Locking sealant

C"O
Front camshaft sprocket

@
Idler

@
Belttensioner

@
Crankshaft sprocket
@

Beltcover lower

@
Beltcover center (Engine
mounting bracket)

(1)
Timing belt
@)

~5 {O.'-0.5, "-
43'

SEM046FA
@
Beltcover upper

@
Gasket

@)
Front camshaft sprocketplate

REMOVAL
1. Drain engine coolant fromradiator.
2. Remove upperradiator hoseandupper beltcover.
3. Remove waterpumppulley.

EM-120

TIMINGBELT
Camshaft TimingBelt(Cont'd)
INSPECTION
Timing belt

Visually checkthecondition oftiming belt.
Replace ifany abnormality isfound.

Item tocheck
Tooth isbroken/tooth
root iscracked.
Back surface is
cracked/worn. Problem

SEM394A
SEM395A
Cause
• Camshaft jamming
• Distributor jamming
• Damaged camshaft/crankshaft oilseal
• Tensioner jamming

• Overhe
ed
engine
• Interference withbeltcover
Side surface isworn. •
Improper installation ofbelt
• Malfunctioning crankshaftpulleyplate/timing
belt plate
• Belt corners areworn andround.
• Wicks arefrayed andcoming out.
SEM396A

Teeth areworn.

-
Rotating direction
-
•
Poor belt
cover
sealing
• Coolant leakageatwater pump
• Camshaft notfunctioning properly
• Distributor notfunctioning properly
• Excessive belttension
Oil, coolant orwater is
stuck tobelt.
•
Canvas
ontooth faceisworn down.

• Canvas
ontooth isfluffy, rubber layeris
worn down andfaded white, orweft isworn
down andinvisible.
SEM397A
EM-122
•
Poor oilsealing ofeach oilseal
• Coolant leakageatwater pump
• Poor belt
cover
sealing

OILSEAL REPLACEMENT

Install newvalve oilseals forNo.1 andNO.4 cylinders as
illustrated. Reinstallvalvesprings. (narrowpitchside
toward cylinder head)
Install valvespring retainers onintake valves andvalve
rotators onexhaust valves,andremount valveassembly.
Set NO.2 cylinder at
TOG.

Replace valveoilseals forNo.2 andNo.3 cylinders accord-
ing tosteps 2)and 3).
Install valvelifters inoriginal positions.
5.
Remove valveliftersandmark order No.oneach lifter.
6. Replace valveoilseal according tothe following procedure.

When replacing valveallseal, setthe corresponding pistonat
TOe. Failure todo socauses thevalve todrop intothecylin-
der.
1) Set NO.1 cylinder at
TOG.

2) Remove valvesprings andvalve oilseals forNO.1 andNo.
4 cylinders. Valvespring seatsshould notberemoved.

VALVE
OilSEAL

1. Remove bothtiming belts.
2. Remove camshaft sprockets andback covers.
3. Remove camshaft bracketsbyloosening bracketnutsfrom
center tooutside intwo orthree stages.
4. Remove camshaft oilseals andcamshaft.

3)

+0.3
15.2 -0.3
mm

(0598
+0.012
In)

4)

. -0.012

5)

6)
~ 7)
SEM512D
Engine
/'t

inside
Y
r-l'\.
Engine
LV outside CAMSHAFT
ANDCRANKSHAFT OilSEAL INSTALLING
DIRECTION ANDMANNER
• When installing camshaftandcrankshaft oilseals, becare-
ful toinstall themcorrectly, asshown inthe figure.
• Apply engine oiltooil seal lip,outer face,camshaft and
bracket. .
• Wipe offexcess allafter installing oilseal.
Oil seal lip Dust
seallip
SEM715A CAMSHAFT OilSEALS

1. Remove timingbelts,sprockets andback covers.
2. Pull outoilseal withasuitable tool.

EM-126

OILSEAL REPLACEMENT

3. Install newoilseals withasuitable tool.

Confirm turningdirection ofboth oilseals andcamshaft .

•

Rear
Front

SEM240D
CRANKSHAFT FRONTOILSEAL

1. Remove valvetiming beltandcrankshaft sprocket.
2. Remove oilseal withasuitable tool.
3. Apply engine oiltonew oilseal andinstall oilseal using a
suitable tool.

CRANKSHAFT REAROILSEAL

1. Remove transaxle assembly. (Referto"REMOVAL AND
INSTALLATION" in
MT
section.)
2. Remove flywheel.
3. Remove rearoilseal withasuitable tool.
4. Apply engine oiltonew oilseal andinstall oilseal using a
suitable tool.

EM-127

CYLINDERHEAD

SEC. 111-130-135

[O.J
87-107 (8.9 -10.9, 64-79)

/ Swirl chamber
(Combustion chamber)
Valve seat

[O.J
87•107 (8.9 -10.9, 64-79)

~ :N.m (kg-m, in-Ib)

[O.J :
N. m (kg-m, ft-Ib)

f] :
Lubricate withnewengine oil.
SEM226F

G)
Camshaft

@
Front oilseal

@
Collar

@
Grommet

@
Front backcover
@ Front camshaft sprocketplate

(J)
Front camshaft sprocket

@
Spring
@

Selective cylinderheadgasket

@)
Valve

@
Spring seat

@
Valve spring
@ Valve oilseal
@ Spring retainer (INT)/Valve
rotator (EXH)

@
Valve cotter
@

Hydraulic valvelifter
@ Rear backcover

@
Rear camshaft sprocket

@
Grommet

@)
Collar
@ Rocker covergasket

@
Cam bracket
@ Rear oilseal

For hydraulic valvelifter
• Before starting engine,makesurethatvalve doesnothitpiston whenrotating crankshaft byhand.
• When bleeding airout from hydraulic valvelifter,runengine atmore than2,400 rpmfor20minutes
or more.

EM-128

SEM373D
SEM682D SEM864
CYLINDER
HEAD

Removal

1. Drain coolant anddisconnect frontexhaust pipefrom man-
ifold.

2. Remove
waterhoses, airduct andintake manifold.

3. Remove
heatshield andexhaust manifold.

4. Remove
rocker
cover
andinjection tubes.

5. Remove
bothtiming belts.
Set NO.1 cylinder atTDC onitscompression stroke.Refer

to
"TIMING BELT"(EM-120).

After timing beltshavebeen removed, donot rotate crankshaft
and/or camshaft separately asvalves willhitpiston heads.
6. Remove
cylinderheadinnumerical orderasshown inthe
figure.

Disassembly
1. Remove frontcamshaft sprocketplate,frontandrear
sprockets usingspecial
service
toolorasuitable tool,and
front back
cover.
2. Remove
camshaft bracketsinorder fromoutside toinside.
• Loosen camshaft bracketnutsintwo orthree stages.

3. Remove
camshaft andoilseals.
•

SEM715B 4.
Remove valve
lifters.

For hydraulic valvelifter
• Do not sethydraulic valvelifters asillustrated asair will
enter valve liftercausing malfunction.
• Donot disassemble hydraulicvalvelifters.
• Attach tagstovalve lifters toprevent mixingthemup.
• Valve liftersmustbeput inengine oilafter removal.

5. Remove
valve
component partsusing special
service
tool
or asuitable tool.

• Keep eachvalve anditscomponents togetherandmark
them sothey canbereassembled intheir original positions.
EM-129

SEM202
SEM731BA

Grade number
Tightening sequence

r
1
@@
~.~.~

o
,..0
W

@
@ @
Facing frontofengine
(position 2)

SEM528DCYLINDER
HEAD
[£Q]

Inspection {Cont'd)

4. Remove cambracket capsandmeasure maximum widthof
plastigage. Camshaft bearingclearance:
Limit
0.1 mm (0.004 in)

5. Ifclearance appearstoexceed thelimit, replace camshaft
or cylinder head.
• Which partstobe replaced shouldbedecided uponafter
measuring thediameters ofthe parts concerned.

Assembly
1. Install valvecomponent parts.
Install valvespring withitsnarrow pitchsidetoward cylinder
head side.
• Always installnewvalve oilseals.
Refer tooil seal replacement.
• Before installing oilseal, install valve-spring seat.
• When installing valve,applyengine oilonthe valve stem
and lipofvalve oilseal.
• Check whether thevalve faceisfree from foreign matter.
• Install valvespring retainers onthe intake sideandvalve
rotators onthe exhaust side.
• Valve rotators cannotbedisassembled.
2. Install camshaft andbrackets andtighten bracket nutstothe
specified torqueintwo orthree stages.
Camshaft-bracket nuts:
~: 18-22 N'm (1.8-2.2 kg-m, 13-16 ft-Ib)
• Tighten bracketfromcenter tooutside.
• Apply sealant tobrackets No.1and No.5.
• When installing "brackets, setcamshaft sothat thepinof
camshaft fronthead isuppermost.
• Install newcamshaft oilseals.
Refer tooil seal replacement.

17.5 (0.689)

o

o
13.0
(0.512)

NO.1 journal bracket No.5journal bracket
Unit: mm(in)
SEM676D
EM-136