1995 NISSAN ALMERA N15 check engine

Engine~
front
Y--J
SEM721E
SEM984C
~ Crankshaft

!..--..V
side
Crankshaft sprocket
SEM470E TIMING
CHAIN
Removal (Cont'd)

30. Remove frontengine mounting.
31. Remove frontcover andoilpump drivespacer.
• Inspect foroilleakage atfront oilseal. Replace sealifoil
leak ispresent.
32. Remove timingchainguides andtiming chain.

Inspection
Check forcracks andexcessive wearatroller links.Replace
chain ifnecessary.
Installation
1. Install crankshaft sprocketoncrankshaft.

• Make surethatmating marksoncrankshaft sprocketface
front ofengine.
EM-73
•

SEM925CCYLINDER
HEAD
Disassembly (Cont'd)

12. Remove valveoilseal with asuitable tool.

Inspection
CYLINDER HEADDISTORTION
. Head surface flatness:
Standard Less than0.03mm(0.0012 in)
Limit
0.1 mm (0.004 in)

If beyond thespecified limit,replace orresurface.

Resurfacing limit:
The resurfacing limitofcylinder headisdetermined bythe cyl-
inder block resurfacing inan engine.
Amount ofcylinder headresurfacing is
"A".

Amount ofcylinder blockresurfacing is
"B".

The maximum limitisas follows:

A
+
B
=
0.2 mm (0.008 in)

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

Nominal cylinderheadheight:
136.9 -137.1 mm(5.390 -5.398 in)
CAMSHAFT VISUALCHECK

Check camshaft forscratches, seizureandwear.

CAMSHAFT RUNOUT

1. Measure camshaft runoutatthe center journal.

Runout (Totalindicator reading):
Standard Less than0.02mm(0.0008 in)
Limit
0.1 mm (0.004 in)

2. Ifitexceeds thelimit, replace camshaft.

EM-88

CYLINDERHEAD
ill]

Assembly (Cont'd)

10. Install valvecomponent parts.

• Install valves withlarger diameter headonthe intake side.

•

Wide pitch
Narrow pitch
Paint mark
Cylinder headside
SEM085D•
Always usenew valve oilseal.
Refer toOIL SEAL REPLACEMENT.
• Before installing valveoilseal, install valvespring seat.
.' Install valvespring (uneven pitchtype) withitsnarrow
pitched sidetoward cylinder headside(paint mark).
• After installing valvecomponent parts,tapvalve stemtip
with plastic hammer toassure aproper fit.

11. Check hydraulic lashadjusters.
a. Push rocker armathydraulic lashadjuster location, andsee
if rocker armmoves. Ifitmoves atleast 1mm (0.04 in),it
indicates thatthere isair inthe high pressure chamber.
Noise willbeemitted fromhydraulic lashadjuster ifengine
is started without bleeding air.
b. Remove hydraulic lashadjuster anddipinacontainer filled
with engine oil.While pushing plungerasshown infigure,
lightly pushcheck ballusing athin rod. Airiscompletely
bled when plunger nolonger moves.

Air cannot bebled from thistype oflash adjuster byrunning the
engine.
SEM093D
• rEngine oil

- - , t-=1=i

Proper
rod
SEM772C
Rocker arm9UVide
Rock~rarm
Shim
Hydraulic
I

.,h
.dj"'"
i\\ j
12.
Install rocker arms,shims, rockerarmguides andhydrau-
lic lash adjusters.

CAUTION: Install allparts intheir original positions.
SEM202D EM-95

SEM123CCYLINDER
BLOCK ~

Inspection (Cont'd)

CYLINDER BLOCKDISTORTION ANDWEAR

1. Clean upperfaceofcylinder blockandmeasure thedistor-
tion. Standard: Less than0.03mm(0.0012 in)
Limit: 0.10 mm(0.0039 in)
2.
If
out ofspecification, resurfaceit.
The resurfacing limitisdetermined bycylinder headresur-
facing inengine.

SEM008D
Amount
ofcylinder headresurfacing is"A".
Amount ofcylinder blockresurfacing is
"8".

The maximum limitisas follows:
A
+
8
=
0.2 mm (0.008 in)
Nominal cylinderblockheight
from crankshaft center:
211.25 -211.35 mm(8.3169 -8.3208 in)
3. Ifnecessary, replacecylinder block.

y

ii-El)'

N 0+ -X

--

00


Unit: mm(in)

SEM363E PISTON-
TO-BORE CLEARANCE

1. Using abore gauge, measure cylinderboreforwear, out-
of-round andtaper.
Standard innerdiameter:
86.000 -86.030 mm(3.3858 -3.3870 in)
Wear limit: 0.20mm(0.0079 in)

If
itexceeds thelimit, rebore allcylinders. Replacecylinder
block ifnecessary.
Out-of-round (X-Y) standard:
Less than0.015 mm(0.0006 in)
Taper (A-
8
and A-C) standard:
Less than0.010 mm(0.0004 in)
2. Check forscratches andseizure. Ifseizure isfound. hone

it.

• When replacing bothcylinder blockandpiston withnew
ones, select piston making sureofgrade numbers. Piston
grade number shouldbethe same asthe grade number
punched oncylinper blockupper surface.
3. Measure pistonskirtdiameter.
Piston diameter "A":Refer toSDS (EM-168).
Measuring point"a"(Distance fromthebottom):
14.0 mm(0.551 in)
4. Check thatpiston-to-bore clearanceiswithin specification.
Piston-to-bore clearance"B":
0.010 -0.030 mm(0.0004 -0.0012 in)
5. Determine pistonoversize according toamount ofcylinder
wear.
Oversize pistonsareavailable forservice. RefertoSDS (EM-
168).

EM-104

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

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

Cylinderheadbolt

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

83 -93

(8.5 -9.5,
(Iii(~)

61.2 -68.6)

39 (4.0, 29)

o
N.m (0kg-m, 0ft-Ib)

SEM673DA
SEM678D CYLINDER
HEAD
Installation
1. Install cylinder headgasket.

• When replacing onlycylinder headgasket, installsame
grade gasket asthe one formerly used.
• When replacing orrepairing cylinderblock,piston, connect-
ing rod and crankshaft, selectgasket referring to"Selecting •
cylinder headgasket".
• Pay attention tothe direction ofthe cylinder headbolt
washer asshown inthe figure.

2. Install cylinder headandtighten cylinder headboltsaccord-
ing tothe following sequence.

Tightening procedure
• Apply engine oiltothreads andunderhead seatingfaceof
each bolt.

1.-
Tighten boltsinnumerical ordershown inthe figure follow-
ing steps below.

@
39N'm (4.0kg-m, 29ft-Ib)

@
83-93 N'm (8.5-9.5 kg-m, 61.2-68.6 ft-Ib)

@
Return to0N'm (0kg-m, 0ft-Ib)

@
39N'm (4.0kg-m, 29ft-Ib)

@
Tighten to75 -80°
If itis difficult tocheck tightening angleofbolt, tighten to83
to 93 N'm (8.5to9.5 kg-m, 61to69 ft-Ib).
2. Install rocker cover.
• Install rocker coverinthe sequence shownatleft.

EM-137

Measuringpoints
Warpage ofsurface:
Less than0.1mm (0.004 in)

SEM655ACYLINDER
BLOCK

Inspection (Cont'd)

CYLINDER BLOCKDISTORTION

Clean upperfaceofcylinder blockandmeasure thedistortion.
Limit:
0.10
mm
(0.0039
in)
If out ofspecification, resurfaceit.
The resurfacing limitofcylinder blockisdetermined bycylin-
der head resurfacing inan engine.

SEM008D
Amount
ofcylinder headresurfacing is"A".
Amount ofcylinder blockresurfacing is"B".
The maximum limitisas follows:

A + B=0.1
mm
(0.004
in)
If necessary, replacecylinder block.

~ Moving thebore gauge
as shown, takethe

//p'
minimum reading.
CYLINDER
BORE

1. Check forscratches orseizure. Ifseizure isfound, hone
bore.
2. Using abore gauge, measure cylinderboreforwear, out-
of-round ortaper.
Standard borediameter:

84.500 -84.550
mm
(3.3268 -3.3287
in)

Unit:mm(in)

If itexceeds thelimit, rebore allfour cylinders. Replacecylin-
der block ifnecessary.
If cylinder blockorpiston isreplaced, matchpiston gradewith
grade number oncylinder blockupper surface.

y

Unit mm(in)

SEM704DA
Bore
wear limit
Out-aI-round (X-Y) standard
Taper (A-B) standard
0.2
(0.008)
0.015 (0.0006)
0.010 (0.0004)
EM-150