NISSAN ALMERA N15 1995 Service Manual

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

SEM558
SEM517D
SEM518D TIMING
BELT
[f[]

Camshaft TimingBelt(Cont'd)
Belt tensioner, tensionerspringandidler

1. Check belttensioner andidler forsmooth turning.
2. Check condition oftensioner spring.

Crankshaft sprocketandfront camshaft sprocket

Check teethforabnormal signs.

INSTALLATION
1. Install crankshaft sprocketplateincorrect direction.
2. Confirm thatNO.1 piston isset atTDC onitscompression
stroke. (TDCisindicated bycrankshaft pulleynotchwithout
painted mark.)
3. Install tensioner andreturn spring.

Temporarily tightenboltssothat tensioner isset atthe fully
outside position.

4. Install idlerandtighten bolttothe specified torque.

EM-123
•

TIMINGBELT
@[]

Camshaft TimingBelt(Cont'd)

5. Install timing beltwith crankshaft sprocket.

a. Align white linesontiming beltwith punchmarks oncam-
shaft sprocket andcrankshaft sprocket.
b. Point arrow ontiming belttoward beltcover.

6. Install camshaft sprocketplateandsecure screws withlock-
tite.
7. Adjust timing belttension.
1) Loosen tensioner lockbolttoapply tension totiming belt.
2) Rotate crankshaft clockwisetwoturns toapply thespecified
tension totiming belt.
3) Tighten tensioner lockboltwhile holding tensioner pUlley
with hexagon wrench. .

Belt tension:

147.1 :1:24.5 N(15:1:2.5 kg,33.1 :1:5.5 Ib)
SEM520D Injection PumpTiming Belt

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

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

SEC.
130-135

~
-"~

.~\(~[-~~' c~1
Timingbelt

?\~-d
(~K.
c
'0
t£
Tensioner spring

J
J
N
0~lJ'00 ~/ Tensioner

t0
J
l\J~.~l:~
'Gl
~')U
r
r~/~
16-21 (1.6 -2.1,12 -15)

It
I
L~0--~ '
~htiJ

JD/~h~J/ "

'SP/
_-z,}) ~A

[/ ......., ....... InJeclion~
.... ~. -;;, pump@J_
• '~~ sprocket~
"fc;,~~-

@ ~
59-
69-.1

Rear camshaft sprocket .~(6.0•7.0,

1m
43-51)

[O;l
87•107

(8.9 -10.9, 64•79)

SEM225F

REMOVAL
1. Set NO.1 cylinder atTDC onitscompression stroke.(TDC
is indicated bycrankshaft pulleynotchwithout painted
mark.)
2. Remove airduct withresonator andtiming beltcover.

EM-124

InjectionpumppUlley
TIMING
BELT
[fQ]

Injection PumpTiming Belt(Cont'd)

3. Remove timingbelt.
1) Loosen tensioner locknutand turn tensioner clockwise to
free beltfrom tension. Thentemporarily tightentensioner
nut.
2) Remove timingbelt.

INSTAllATION

1. Confirm thatNO.1 piston isset atTDC onitscompression
stroke. (TDCisindicated bycrankshaft pulleynotchwithout
painted mark.)
• Ifinjection pumppulley wasremoved, confirmthatitis
re-installed asillustrated.

Identification ofalignment:
Use mark "A"

2. Set timing belt.

a. Align white linesontiming beltwith punchmarks oncam-
shaft sprocket andinjection pumpsprocket.
b. Point arrow ontiming belttoward beltcover.

3. Adjust belttension.
1) Loosen tensioner locknuttoapply tension totiming belt.
2) Rotate crankshaft clockwisetwoturns.

Do not turn crankshaft bycamshaft sprockets.

3) Tighten tensioner locknutwhile holding tensioner witha
screwdriver.

Belt tension:
147:l:49 N(15:l:5 kg,33:l:11 Ib)

INSPECTION

Refer toINSPECTION in"Camshaft TimingBelt"(EM-122).

INJECTION TIMINGADJUSTMENT

Refer toEC section.

EM-125
•

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

Warpageofsurface:
Less than0.1mm (0.004 in)

SEM595A

_ Mic~rmeter

..;- @f

l ~

--I\"
Y

'~~':-- +x

'~o
rA1-
Center

[gJ
Bottom
Valve guide Valve

SEM244D CYLINDER
HEAD
Disassembly (Cont'd)

6. Remove valveoilseals usingspecial tool.

Inspection
CYLINDER HEADDISTORTION

1. Visually checkforcracks anddeformation.
2. Check cylinder headfordistortion.

Head surface flatness:
Less than0.1mm (O.004 in)

If beyond thespecified limit,replace orresurface cylinder
head.

Resurfacing limit:
The resurfacing limitofthe cylinder headisrelated tothe
amount ofresurfacing ofthe cylinder block.
When:
"A"
isthe amount ofresurfacing neededforthe cylinder head
and
"8"
isthe amount ofresurfacing neededforthe cylinder
block, themaximum limitisdetermined by
A + 8= 0.1 mm (O.004 in)

After resurfacing cylinderhead,check thatcamshaft rotates
freely byhand. Ifresistance isfelt, thecylinder headmustbe
replaced.

Nominal heightofcylinder head:
137.9. 138.1mm(5.429 .5.437 in)
VALVE GUIDECLEARANCE

1. Measure deflection acrossthecylinder headasillustrated.

Valve deflection limit(dial gauge reading):
0.1 mm (0.004 in)

2. Ifexceeding thelimit, check valve-to-guide clearance.
a) Measure valvestemdiameter andvalve guide innerdiam-
eter asillustrated.
b) Check thatclearance iswithin thespecification .

Valve stemtovalve guide clearance limit:
0.1 mm (O.004 in)

c) Ifexceeding thelimit, replace valveorvalve guide.

EM-130

NGNG

SEM722BA CYLINDER
HEAD
[]Q]

Inspection (Cont'd)
VALVE GUIDEREPLACEMENT

1. Heat cylinder headinoil to150 to160°C (302to320°F).
2. Drive outvalve guide usingapress orhammer andasuit-
able tool.
3. Ream cylinder headvalve guide bore.

Reaming bore(service part):
11.185.11.196 mm(0.4404 .0.4408 in)

4. Heat cylinder headto150 to160°C (302to320°F) andpress
service valveguide ontocylinder head.
5. Ream valveguide.

Final size:
7.000 .7.015 mm(0.2756 .0.2762 in)
VALVE SEATS

1. Check valveandvalve seatforcontact.
Coat thevalve facewithprussian redlead.
If
contact is
wrong, correct valveseat.Ifthe valve redlead appears 360°
around face,thevalve stemandface areconcentric. Ifnot,
repair orreplace valve.
2. Check valveseats forpitting atcontact surface. Resurface
or replace ifexcessively worn.
Correct valveseatsurface.

When repairing valveseat,check valveandvalve guide for
wear beforehand. Ifworn, replace them.Thencorrect valve
seat.
EM-131
•