1995 NISSAN ALMERA N15 Service Manual

OILSEAL REPLACEMENT

KV10l07902
VALVE
OilSEAL

1. Remove rockercover.
2. Remove camshaft.
3. Remove valvespring. Referto"CYLINDER HEAD".
4. Remove valveoilseal withasuitable tool.

Piston concerned shouldbeset atTOC toprevent valvefrom
falling.

5. Apply engine oiltonew valve oilseal andinstall itwith Tool.

SEM136D
10.5
mm

(0.413 In)
SEM137D
FRONTOilSEAL

1. Remove thefollowing parts:
• Engine undercover
• Right-side splashcover
• Alternator andpower steering drivebelts
• Crankshaft pulley
2. Remove frontoilseal from front cover.

Be careful nottodamage oilseal portion.

• Install newoilseal inthe direction shown.

Engine /',

inside
Y
~
Engine

Youtside
Oil seal lip Dust
seal
lip
SEM715A EM-30

OILSEAL REPLACEMENT

3. Apply engine oiltonew oilseal andinstall itusing asuit-
able tool.

REAR OILSEAL

1. Remove flywheel ordrive plate.
2. Remove rearoilseal retainer.
3. Remove tracesofliquid gasket usingscraper.
4. Remove sealfrom rearoilseal retainer.

Be careful nottoscratch rearoilseal retainer.
/' SEM096F

•Install newoilseal inthe direction shown.

Engine
/'-l_ _~
Engine
inside
Y LV
outside
Oil seal lip Dustseallip

SEM715A
5.Apply engine oiltonew oilseal andinstall itusing asuit-
able tool.

SEM097F
EM-31
•

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
•