NISSAN ALMERA N15 1995 Service Manual

WITHVTC
SEC. 111.130

G)
Oilfiller cap

@
Rocker cover

@
Rocker covergasket

@
Oilseal

@
Camshaft bracket

@
Intake camshaft

(J)
Exhaust camshaft

@
Distributor bracket
CYLINDER
HEAD

@
Cylinder headbolt

@
Shim

@
Valve lifter

@
Valve cotter

@
Valve spring retainer

@
Valve spring

@
Valve spring seat

EM-32
7

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

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

~ :Apply
liquidgasket.

f] :
Lubricate withnew
engine oil.

SEM099FB

@
Valve oilseal

@
Valve guide

@
Cylinder head

@)
Cylinder headgasket

@)
Valve seat

@
Valve

@
Cylinder headfrontcover

WITHOUT VTC

SEC. 111-130

G)
Oilfiller cap

@
Rocker cover

@
Rocker covergasket

@
Oilseal

@
Camshaft bracket

@
Intake camshaft

(J)
Exhaust camshaft

@
Distributor bracket
CYLINDER
HEAD
@
Cylinder headbolt

@)
Shim

@
Valve lifter

@
Valve cotter

@
Valve spring retainer

@
Valve spring

@
Valve spring seat

EM-33
Ij]
.
N.m (kg-m, in-Ib)
~ :N.m (kg-m, ft-Ib)

~ :Apply
liquidgasket.

f) :
Lubricate withnewengine oil.

SEM244F
@
Valve oilseal

@
Valve guide

@
Cylinder head

@
Cylinder headgasket

@
Valve seat

@
Valve

@
Cylinder headfrontcover
•

CYLINDERHEAD
CAUTION:
• When installing camshaft, oilseals orother sliding parts,
lubricate contacting surfaceswithnewengine oil.
• When tightening cylinderheadbolts, camshaft sprocket
bolts andcamshaft bracketbolts,lubricate threadportions
and seat surfaces ofbolts withnewengine oil.
• Attach tagstovalve lifters soas not tomix them up.
Removal

• This removal isthe same procedure asthose fortiming
chain. Referto"Removal" in"TIMING CHAIN"(EM-20).

Disassembly
1. Remove valvecomponents withTool.
2 .. Remove valveoilseal withasuitable tool.

Inspection
CYLINDER HEADDISTORTION

Clean surface ofcylinder head.
Use areliable straightedge andafeeler gauge tocheck the
flatness ofcylinder headsurface.
Check alongsixpositions showninfigure.

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

If beyond thespecified limit,replace itor resurface it.

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

Amount ofcylinder blockresurfacing is
"8".

The maximum limitisas follows:
A +8
=
0.2 mm (0.008 in)

After resurfacing cylinderhead,check thatcamshaft rotates
freely byhand. Ifresistance isfelt, cylinder headmust be
replaced.
Nominal cylinderheadheight:
117.8 -118.0 mm(4.638 .4.646 in)
CAMSHAFT VISUALCHECK

Check camshaft forscratches, seizureandwear.

EM-34

SEM154D
SEM549A CYLINDER
HEAD
Inspection (Cont'd)
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.

CAMSHAFT CAMHEIGHT

1. Measure camshaft camheight.
Unit:mm(in)

GA16DE GA16DE
GA16DE
Engine model GA14DEGA15DE
withoutwith
VTC withVTC
for Aus- except
for
VTC traliaAustralia
39.880 -39.380 -
Intake 40.070
39570 40.610
-40.800
39.380 -(1.5701
-(1.5504 -(1.5988 -1.6063)
Standard 39.5701.5776)
1.5579)
cam height (1.5504-
40.056 -39.880 -39.910 -40.056
-
1.5579) 40.24640.07040.01040.246
Exhaust (1.5770-(1.5701
-(1.5713 -(1.5770
-
1.5845) 1.5776}1.5752)
1.5845}
Cam wear limit 0.20
(O.0079)

2. Ifwear isbeyond thelimit, replace camshaft.
•

CAMSHAFT JOURNALCLEARANCE

1. Install camshaft bracketandtighten boltstothe specified
torque.
2. Measure innerdiameter ofcamshaft bearing.

Standard innerdiameter:
No. 1bearing
28.000.28.021 mm(1.1024.1.1032 in)
No. 2to No. 5bearings
24.000 •24.021 mm(0.9449 .0.9457 in)

3. Measure outerdiameter ofcamshaft journal.

Standard outerdiameter:
No.1 journal
27.935.27.955 mm(1.0998 .1.1006 in)
No.2 toNo.5 journals
23.935 -23.955 mm(0.9423 •0.9431 in)

4. Ifclearance exceedsthelimit, replace camshaft and/orcyl-
inder head.

Camshaft journalclearance:
Standard 0.045 •0.086 mm(0.0018 •0.0034 in)
Limit 0.15 mm(0.0059 in)
EM-3S

SEM157D
SEM158D
SEM938C CYLINDER
HEAD
rnJ

Inspection (Conf'd)
CAMSHAFT ENDPLAY

1. Install camshaft incylinder head.
2. Measure camshaft endplay.

Camshaft endplay:
Standard For Europe 0.070-0.143 mm(0.0028 -0.0056 in)
Except forEurope 0.115•0.188 mm(0.0045 -0.0074
in)
Limit 0.20 mm(0.0079 in)
CAMSHAFT SPROCKETRUNOUT

1. Install sprocket oncamshaft.
2. Measure camshaft sprocketrunout.

Runout (Totalindicator reading):
Limit 0.1mm (0.004 in)

3. Ifitexceeds thelimit, replace camshaft sprocket.

VALVE GUIDECLEARANCE

1. Measure valvedeflection inaparallel direction withrocker
arm. (Valve andvalve guide mostly wearinthis direction.)

Valve deflection limit(Dial gauge reading):
Intake
&
Exhaust
0.2 mm (0.008 in)

2. Ifitexceeds thelimit, check valvetovalve guide clearance.
a. Measure valvestemdiameter andvalve guide innerdiam-
eter.
b. Check thatclearance iswithin specification.

Valve tovalve guide clearance:

Unit:mm(in)

Standard Limit
Intake
0.020
-0.050
0.1(0.004)
(0.0008 -0.0020)

Exhaust
0.040
-0.070
0.1(0.004)
(0.0016 -0.0028)

c. Ifitexceeds thelimit, replace valveorvalve guide.

EM-36

SEM008A
MEM09SA CYLINDER
HEAD
[]KJ

Inspection (Cont'd)
VALVE GUIDEREPLACEMENT

1. Toremove valveguide, heatcylinder headto110 to120°C
(230 to248°F).
2. Drive outvalve guide withapress [under a20 kN (2ton, 2.2
US ton, 2.0Imp ton) pressure] orhammer andsuitable tool.
3. Ream cylinder headvalve guide hole.

Valve guide holediameter
(for service parts):
Intake
&
Exhaust
9.685 .9.696 mm(0.3813 -0.3817 in)

4. Heat cylinder headto110 to120°C (230to248°F) andpress
service valveguide intocylinder head.

Projection
"l":

11.5 -11.7 mm(0.453 -0.461 in)

5. Ream valveguide.

Finished size:
Intake
&
Exhaust
5.500 -5.515 mm(0.2165 -0.2171 in)
EM-37
•

I

Recess
1
diameter

I

SEM795A CYLINDER
HEAD
Inspection (Cont'd)
VALVE SEATS

Check valveseats forpitting atcontact surface. Resurface or
replace ifexcessively worn.

• Before repairing valveseats, checkvalveandvalve guide
for wear. Ifthey have worn, replace them.Thencorrect
valve seat.
• Cut with both hands touniform thecutting surface.
REPLACING VALVESEATFORSERVICE PARTS

1. Bore outold seat until
it
collapses. Setmachine depthstop
so that boring cannot contact bottomfaceofseat recess in
cylinder head.
2. Ream cylinder headrecess.

Reaming boreforservice valveseat
Oversize [0.5mm(0.020 in)]:
Unit:mm(in)
Engine model GA16DE
withoutVTC,
GA16DE withVTC
14DE and15DE
30.500 -30.516
Intake (1.2008
-1.2014)
31.500-31.516
31.500 -31.516
(1.2402-1.2408)
(1.2402 -1.2408).
Exhaust 25.500
-25.516
26.500-26.516
(1.0039 -1.0046)
(1.0433-1.0439)
.: GA 16DE without VTC
Use thevalve guide center forreaming toensure valveseatwill
have thecorrect fit.
EM-38

T(Margin thickness)

--1,-

ml
a

III' ~

o

~-
-L
d
SEM8928

I
.\

SEM188A
CYLINDER
HEAD

Inspection (Conl'd)

3. Heat cylinder headto110 to120°C (230to248°F).
4. Press fitvalve seatuntilitseats onthe bottom .
5. Cut orgrind valve seatusing suitable toolatthe specified
dimensions asshown inSOS (EM-159).
6. After cutting, lapvalve seatwithabrasive compound.
7. Check valveseating condition.
Seat faceangle "a":
45°15' -45°45' deg.
Contacting width"W":
Intake
1.06 -1.34 mm(0.0417 -0.0528 in)
Exhaust
1.20 -1.68 mm(0.0472 -0.0661 in)

VALVE DIMENSIONS

Check dimensions ineach valve. Fordimensions, refertoSOS
(EM-156).
When valveheadhasbeen worn down to0.5 mm (0.020 in)in
margin thickness, replacevalve.
Grinding allowance forvalve stemtipis0.2 mm (0.008 in)or
less.
•

SEM288A VALVE
SPRING

Squareness
1. Measure "S"dimension.
Out-of-square: Less than1.80mm(0.0709 in)
2. Ifitexceeds thelimit, replace spring.

EM113
Pressure

Check valvespring pressure.
Pressure: N(kg, Ib)atheight mm(in)
Standard 344.42 (35.12, 77.44)at25.26 (0.9945)
Limit More than323.73 (33.01, 72.79)at25.26 (0.9945)
If itexceeds thelimit, replace spring.

EM-39

SEM160DCYLINDER
HEAD

Inspection (Cont'd)

VALVE LIFTER ANDVALVE SHIM

1. Check contact andsliding surfaces forwear orscratches.

SEM161D
SEM162D
2.
Check diameter ofvalve lifterandvalve lifterguide bore.

Valve lifterdiameter:
29.960 •29.975 mm(1.1795 •1.1801 in)
Lifter guide borediameter:
30.000 -30.021 mm(1.1811 .1.1819 in)
Clearance betweenvalvelifterandvalve lifterguide
0.025 -0.061 mm(0.0010 -0.0024 in)

If
it
exceeds thelimit, replace valvelifterorcylinder head
which exceeds thestandard diameter tolerance.

o

Cylinder headside Wide
pitch
Narrow pitch
SEM638B
Assembly

1. Install valvecomponent parts.

• Always usenew valve oilseal. Refer toOIL SEAL
REPLACEMENT (EM-30).
• Before installing valveoilseal, install valvespring seat.
• After installing valvecomponents, tapvalve stemtipwith a
plastic hammer toassure aproper fit.
• Install uneven pitchtypespring withitsnarrow pitchend
toward cylinder head.(Identification colorsidedown, if
present.)

Installation

• This installation isthe same procedure asthose fortiming
chain. Referto"Installation" in"TIMING CHAIN"(EM-23).

EM-40

VALVECLEARANCE
1 1 22
2 2 44
SEM140D Checking
Check valveclearance whileengine iswarm andnotrunning.

1. Remove rockercover.
2. Remove allspark plugs.
3. Set
NO.1
cylinder atTOC onitscompression stroke.
• Align pointer withTOC mark oncrankshaft pulley.
• Check thatvalve lifters on
NO.1
cylinder areloose andvalve
lifters on
NO.4
aretight.
If not, turn crankshaft onerevolution (360°)andalign as
above.
4. Check onlythose valves showninthe figure.
• Using afeeler gauge, measure clearance betweenvalve
lifter andcamshaft.
• Record anyvalve clearance measurements whichareoutof
specification. Theywillbeused latertodetermine the
required replacement adjustingshim.

Valve clearance forchecking (Hot):
Intake 0.21 -0.49 mm(0.008 .0.019 in)
Exhaust 0.30. 0.58mm(0.012 -0.023 in)

5. Turn crankshaft onerevolution (360°)andalign markon
crankshaft pulleywithpointer.
6. Check thosevalves shown inthe figure.
• Use thesame procedure asmentioned instep 4.
7. Ifall valve clearances arewithin specification, installthe
following parts.
• Rocker cover
• Allspark plugs
•

"-

Tool (A}KV10115110

,

SEM141DAdjusting
Adjust valveclearance whileengine iscold.

1. Turn crankshaft, toposition camlobeoncamshaft ofvalve
that must beadjusted upward.
2. Place Tool(A)around camshaft asshown infigure.

Before placing Tool(A),rotate notchtoward centerofcylinder
head (Seefigure.), tosimplify shimremoval later.
CAUTION: Be careful nottodamage camsurface withTool (A).
EM-41