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ENGINE MECHANICAL

EM
GI

SECTION MA

CONTENTS LC

PRECAUTIONS .......................................................... 2 Camshaft Journal Clearance ............................ 33 EC
Parts Requiring Angular Tightening ........................ 2 Camshaft End Play........................................... 34
Liquid Gasket Application Procedure...................... 2 Camshaft Sprocket Runout .............................. 34
FE
PREPARATION........................................................... 3 Valve Guide Clearance..................................... 34
Special Service Tools.............................................. 3 Valve Guide Replacement ................................ 35
Commercial Service Tools ...................................... 6 Valve Seats....................................................... 36 CL
NOISE, VIBRATION AND HARSHNESS (NVH) Replacing Valve Seat For Service Parts .......... 36
TROUBLESHOOTING ................................................ 8 Valve Dimensions ............................................. 37
NVH Troubleshooting Chart -- Engine Noise ........ 9 Valve Spring...................................................... 37 MT
OUTER COMPONENT PARTS ................................ 10 Valve Lifter And Valve Shim ............................. 37
COMPRESSION PRESSURE................................... 13 Assembly............................................................... 38
Measurement of Compression Pressure .............. 13 Valve Clearance.................................................... 38
AT
OIL PAN .................................................................... 15 ENGINE REMOVAL.................................................. 41
Removal ................................................................ 15 Removal ................................................................ 42 FA
Installation ............................................................. 17 Installation ............................................................. 43
TIMING CHAIN ......................................................... 19 CYLINDER BLOCK .................................................. 44
Removal ................................................................ 21 Disassembly.......................................................... 45 RA
Upper Timing Chain.......................................... 21 Piston And Crankshaft...................................... 45
Idler Sprocket ................................................... 22 Inspection.............................................................. 46
Lower Timing Chain.......................................... 22 Piston And Piston Pin Clearance ..................... 46 BR
Inspection.............................................................. 23 Piston Ring Side Clearance ............................. 46
Installation ............................................................. 24 Piston Ring End Gap........................................ 46 ST
Lower Timing Chain.......................................... 24 Connecting Rod Bend And Torsion .................. 47
Upper Timing Chain.......................................... 25 Cylinder Block Distortion .................................. 47
OIL SEAL REPLACEMENT ..................................... 26 Piston-To-Bore Clearance ................................ 48 RS
Valve Oil Seal ....................................................... 26 Crankshaft ........................................................ 49
Front Oil Seal........................................................ 26 Bearing Clearance ............................................ 49
Rear Oil Seal ........................................................ 27 Connecting Rod Bushing Clearance BT
ACCEL-DRUM UNIT................................................. 28 (Small end) ....................................................... 51
Adjustment ............................................................ 28 Replacement of Connecting Rod Bushing
HA
CYLINDER HEAD..................................................... 30 (Small end) ....................................................... 52
Removal ................................................................ 31 Flywheel/Drive Plate Runout ............................ 52
Installation ............................................................. 31 Assembly............................................................... 52 EL
Disassembly.......................................................... 32 Piston ................................................................ 52
Inspection.............................................................. 32 Crankshaft ........................................................ 53
Cylinder Head Distortion .................................. 32 Replacing Pilot Bushing ................................... 54 IDX
Camshaft Visual Check .................................... 33 SERVICE DATA AND SPECIFICATIONS (SDS) ..... 56
Camshaft Runout.............................................. 33 General Specifications .......................................... 56
Camshaft Cam Height ...................................... 33 Inspection and Adjustment.................................... 56
PRECAUTIONS

Parts Requiring Angular Tightening
q Use an angle wrench for the final tightening of the following
engine parts:
(1) Cylinder head bolts
(2) Main bearing cap bolts
(3) Connecting rod cap nuts
q Do not use a torque value for final tightening.
q The torque value for these parts is for a preliminary step.
q Ensure thread and seat surfaces are clean and coated with
engine oil.

Liquid Gasket Application Procedure
a. Use a scraper to remove all traces of old liquid gasket
from mating surfaces and grooves. Also, completely
clean any oil from these areas.
b. Apply a continuous bead of liquid gasket to mating sur-
faces. (Use Genuine RTV silicone sealant Part No.
999MP-A7007 or equivalent.)
q For oil pan, be sure liquid gasket diameter is 3.5 to
4.5 mm (0.138 to 0.177 in).
q For areas except oil pan, be sure liquid gasket diam-
SEM164F
eter is 2.0 to 3.0 mm (0.079 to 0.118 in).
c. Apply liquid gasket around the inner side of bolt holes
(unless otherwise specified).
d. Assembly should be done within 5 minutes after coat-
ing.
e. Wait at least 30 minutes before refilling engine oil and
engine coolant.

AEM080

EM-2
PREPARATION

Special Service Tools
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
GI
Tool number
(Kent-Moore No.) Description
Tool name
MA
ST0501S000 Disassembling and assembling
( -- )
Engine stand assembly EM
1 ST05011000
( -- )
Engine stand LC
2 ST05012000
( -- )
Base EC
NT042

KV10114300
( -- ) FE
Engine sub-attachment

NT239
MT
KV10106500
( -- )
Engine stand shaft AT

NT028 FA
KV10109250 Disassembling and assembling valve com-
(J-26336-B) ponents
RA
Valve spring
compressor
1 KV10109210
BR
( -- )
Compressor
2 KV10109220
( -- )
ST
Adapter

or (J-39773) RS
Valve spring
compressor kit NT021
BT
KV10116300 Installing valve oil seal
(J-38955)
Valve oil seal drift a: 25 (0.98) dia. HA
b: 14.4 (0.567) dia.
c: 11.8 (0.465) dia.
d: 10 (0.39) dia.
EL
e: 11 (0.43)
f: 9 (0.35)
NT602 Unit: mm (in)
IDX

EM-3
PREPARATION
Special Service Tools (Cont'd)
Tool number
(Kent-Moore No.) Description
Tool name

KV10110300 Disassembling and assembling
( -- ) piston with connecting rod
Piston pin press stand
assembly
1 KV10110310
( -- )
Cap
2 KV10110330
( -- )
Spacer
3 ST13030020
( -- )
Press stand
4 ST13030030
( -- )
Spring
5 KV10110340
( -- )
Drift
6 KV10110320
( -- )
Center shaft

NT036

EM03470000 Installing piston assembly into cylinder bore
(J8037)
Piston ring compressor

NT044

(J36467) Displacement valve oil seal
Valve oil seal remover

NT034

KV10111100 Removing oil pan
(J37228)
Seal cutter

NT046

WS39930000 Pressing the tube of liquid gasket
( -- )
Tube presser

NT052

ST16610001 Removing crankshaft pilot bushing
(J23907)
Pilot bushing puller

NT045

EM-4
PREPARATION
Special Service Tools (Cont'd)
Tool number
(Kent-Moore No.) Description
Tool name GI
ST10120000 Loosening and tightening cylinder head bolt
(J-24239-01)
Cylinder head bolt wrench
MA

a: 13 (0.51) dia.
b. 12 (0.47) EM
c: 10 (0.39)
NT583 Unit: mm (in)
LC
KV10115150 Changing shims
(J-38972)
Lifter stopper set EC
1 KV10115110
(J-38972-1)
Camshaft pliers FE
2 KV10115120
(J-38972-2)
Lifter stopper NT041 CL
KV10112100 Tightening bolts for bearing cap, cylinder
(BT8653-A) head, etc. MT
Angle wrench

NT014 FA
KV10117100 Loosening or tightening front heated
(J36471-A) oxygen sensor [22 mm (0.87 in) type] RA
Front heated oxygen
sensor wrench
NT630 BR

IDX

EM-5
PREPARATION

Commercial Service Tools
Tool name Description

Spark plug wrench Removing and installing spark plug

NT047

Pulley holder Holding camshaft pulley while tightening or
loosening camshaft bolt

NT035

Valve seat cutter set Finishing valve seat dimensions

NT048

Piston ring expander Removing and installing piston ring

NT030

Valve guide drift Removing and installing valve guide

Intake & Exhaust:
a: 10.5 mm (0.413 in) dia.
NT015 b: 6.6 mm (0.260 in) dia.

Valve guide reamer Reaming valve guide 1 or hole for oversize
valve guide 2

Intake & Exhaust:
d1: 7.0 mm (0.28 in) dia.
NT016 d2: 11.175 mm (0.4400 in) dia.

Oxygen Sensor Reconditioning the exhaust system threads
thread cleaner before installing a new oxygen sensor. Use
(J-43897-18) with anti-seize lubricant shown below.
(J-43897-12)

a: J-43897-18 18 mm diameter, for
Zirconia oxygen sensor.
b: J-43897-12 12 mm diameter, for
AEM488 Titania oxygen sensor.

EM-6
PREPARATION
Commercial Service Tools (Cont'd)
Anti-seize lubricant (Perma- Lubricating oxygen sensor thread cleaning
texTM 133 AR or equivalent tool when reconditioning exhaust system
meeting MIL specification threads. GI
MIL-A-907)

AEM489
EM

IDX

EM-7
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING

WEM003

EM-8
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING

NVH Troubleshooting Chart -- Engine Noise
Use the chart below to help you find the cause of the symptom.
1. Locate the area where noise occurs. GI
2. Confirm the type of noise.
3. Specify the operating condition of engine.
4. Check specified noise source. MA
If necessary, repair or replace these parts.
Operating Condition of Engine.
Location of Type of
Source of Noise Check Item
Reference EM
Noise Noise Before After When When When While page
warm-up warm-up starting idling revving driving

Ticking
Top of Engine or click
C A -- A B -- Tappet noise Valve clearance EM-38 LC
Rocket Cover
Cylinder Head Camshaft bear- Camshaft journal clearance
Rattle C A -- A B C EM-33
ing noise Camshaft runout

Slap or Pistion and piston pin clearance
EC
-- A -- B B -- Piston pin noise EM-46, 51
knock Connecting rod bushing clearance
Crankshaft Pul-
ley Piston-to-bore clearance
Slap or
A -- -- B B A
Piston slap Piston ring side clearance
EM-46, 48
FE
rap noise Piston ring end gap
Cylinder block
Connecting rod bend and torsion
(Side of
Engine)
Connecting rod- Connecting rod bearing clearance (Big end)
Knock A B C B B B
bearing noise Connecting rod bushing clearance (Small end)
EM-51, 51 CL
Oil pan
Main bearing Main bearing oil clearance
Knock A B -- A B C EM-49, 49
noise Crankshaft runout

Front of Engine Timing chain MT
Tapping Timing chain cracks and wear
Timing Chain A A -- B B B and chain ten- EM-23
or ticking Timing chain tensioner operation
Cover sioner noise

Squeak
A B -- B -- C
Other drive
belts (sticking Drive belts deflection
MA section AT
or fizzing ("Checking
or slipping)
Drive Belts",
"Engine Main-
Other drive
Creaking A B A B A B Idler pulley bearing operation
Front of Engine
belts (slipping)
tenance")
FA
LC section
("Water Pump
Squall or Water pump
A B -- B A B Water pump operation Inspection",
creak noise
"Engine Cool- RA
ing System")

A: Closely related B: Related C: Sometimes related --: Not related
BR

IDX

EM-9
OUTER COMPONENT PARTS

WEM011

EM-10
OUTER COMPONENT PARTS

HA
WEM059

IDX

EM-11
OUTER COMPONENT PARTS

Tightening procedure

WEM005

EM-12
COMPRESSION PRESSURE

Measurement of Compression Pressure
1. Warm up engine.
2. Turn ignition switch OFF. GI
3. Release fuel pressure.
Refer to EC section, (``Fuel Pressure Release'').
4. Remove all spark plugs. MA
q Clean area around plug with compressed air before
removing the spark plug.
5. Disconnect camshaft position sensor harness connector at EM
the distributor.
6. Disconnect all fuel injector harness connectors.
LC

MT
7. Attach a compression tester to No. 1 cylinder.
8. Depress accelerator pedal fully to keep throttle valve wide
open. AT
9. Crank engine and record highest gauge indication.
10. Repeat the measurement on each cylinder.
q Always use a fully-charged battery to obtain specified FA
engine speed.
Compression pressure: kPa (kg/cm2, psi)/300 rpm
Standard RA
1,226 (12.5, 178)/300
AEM052 Minimum
1,030 (10.5, 149)/300 BR
Difference limit between cylinders
98 (1.0, 14)/300
11. If compression in one or more cylinders is low: ST
a. Pour a small amount of engine oil into cylinders through
spark plug holes.
b. Retest compression. RS
q If adding oil helps compression, piston rings may be
worn or damaged. If so, replace piston rings after
checking piston. BT
q If pressure stays low, a valve may be sticking or seat-
ing improperly. Inspect and repair valve and valve seat.
HA
(Refer to SDS.) If valve or valve seat is damaged
excessively, replace.
q If compression stays low in two cylinders that are next EL
to each other:
a. The cylinder head gasket may be leaking, or
b. Both cylinders may have valve component damage. IDX
Inspect and repair as necessary.
12. Reconnect fuel pump fuse, all fuel injector harness
connectors, and camshaft position sensor harness connec-
tor at the distributor and reinstall spark plugs.
13. Erase the DTC stored in the ECM.

EM-13
COMPRESSION PRESSURE
Measurement of Compression Pressure
(Cont'd)
CAUTION:
q Always erase the DTC after checking compression.
Refer to EC section, (``Emission-related Diagnostic
Information'').

EM-14
OIL PAN

AT
WEM088

FA
Removal
1. Remove engine undercover.
2. Drain engine oil. RA

BR
3. Remove steel oil pan bolts.
q Remove in reverse order as shown.
ST

BT
SEM118E
HA
4. Remove steel oil pan.
a. Insert Tool between aluminum oil pan and steel oil pan.
q Be careful not to damage aluminum mating surface. EL
q Do not insert screwdriver or oil pan flange will be dam-
aged.
b. Slide Tool by tapping on the side of Tool with hammer. IDX

SEM365E

EM-15
OIL PAN
Removal (Cont'd)
5. Remove baffle plate.
6. Remove oil strainer.

AEM318

7. Remove exhaust front tube.
8. Set a suitable transmission jack under transaxle and lift
engine with engine slinger.
9. Remove center member.

SEM120E

10. Remove compressor gusset.

SEM121E

11. Remove rear cover plate.

SEM122E

12. Remove aluminum oil pan nuts and bolts.
q Remove in reverse order as shown.

SEM123E

EM-16
OIL PAN
Removal (Cont'd)
13. Remove aluminum oil pan.
a. Insert Tool between cylinder block and aluminum oil pan.
q Be careful not to damage aluminum mating surface. GI
q Do not insert screwdriver or oil pan flange will be dam-
aged.
b. Slide Tool by tapping on the side of Tool with a hammer. MA

EM
SEM365E

LC
Installation
1. Use a scraper to remove old liquid gasket from mating sur-
face of aluminum oil pan. EC
q Also remove old liquid gasket from mating surface of
cylinder block.
FE

CL
SEM050D
MT
2. Apply a continuous bead of liquid gasket to mating surface
of aluminum oil pan.
q Use Genuine RTV silicone sealant Part No. 999MP- AT
A7007 or equivalent.
q Apply to groove on mating surface.
q Allow 7 mm (0.28 in) clearance around bolt holes. FA

RA
SEM015E
BR
q For areas marked with `` '', apply liquid gasket around
the outer side of the bolt hole.
q Be sure liquid gasket diameter is 3.5 to 4.5 mm (0.138 ST
to 0.177 in).
q Attaching should be done within 5 minutes after coat-
ing. RS

BT
SEM127E
HA
3. Install aluminum oil pan.
q Tighten nuts and bolts in numerical order shown.
4. Install rear cover plate. EL

IDX

SEM123E

EM-17
OIL PAN
Installation (Cont'd)
5. Install compressor gusset.
6. Install center member.
7. Remove suitable transmission jack from under transaxle
and lower engine.
8. Install front tube.
9. Install oil strainer.
10. Install baffle plate.

SEM121E

11. Use a scraper to remove old liquid gasket from mating sur-
face of steel oil pan.
q Also remove old liquid gasket from mating surface of
aluminum oil pan.

SEM128E

12. Apply a continuous bead of liquid gasket to mating surface
of steel oil pan.
q Use Genuine RTV silicone sealant Part No. 999-A7007
or equivalent.
q Apply to groove on mating surface.
q Allow 7 mm (0.28 in) clearance around bolt holes.

SEM015E

q Be sure liquid gasket diameter is 3.5 to 4.5 mm (0.138
to 0.177 in).
q Attaching should be done within 5 minutes after coat-
ing.

SEM129E

13. Install steel oil pan.
q Tighten bolts in numerical order shown.
q Wait at least 30 minutes before refilling engine oil.

SEM118E

EM-18
TIMING CHAIN

IDX

WEM123

EM-19
TIMING CHAIN

Liquid gasket application places

SEM135E

BEM002 SEM137E

EM-20
TIMING CHAIN

Removal
CAUTION:
q After removing timing chain, do not turn crankshaft and GI
camshaft separately, or valves will strike piston heads.
q When installing chain tensioners or other sliding parts,
lubricate contacting surfaces with new engine oil. MA
q Apply new engine oil to bolt threads and seat surfaces
when installing camshaft sprockets and crankshaft pul-
ley. EM
q Do not spill engine coolant on drive belts.
UPPER TIMING CHAIN LC
1. Remove the spark plug wires.

MT
2. Set No.1 piston at TDC on its compression stroke.
3. Remove vacuum hoses, electrical harness connectors, and
harness clamps. AT
4. Remove the power steering belt, A/C compressor belt and
generator belt.
5. Remove the generator support bracket and generator, posi- FA
tion aside.
6. Remove the power steering reservoir tank and reposition it
for clearance. RA
SEM140E
BR
7. Install the engine slinger at the right rear of the cylinder
head and support engine. Refer to ``ENGINE REMOVAL'',
EM-41. ST
8. Remove the upper right engine mount and bracket.
9. Remove the rocker cover.
q Remove in numerical order as shown. RS

BT
SEM142E
HA
10. Remove the camshaft sprocket cover.
q The stoppers on camshaft sprocket cover prevent
upper timing chain from disengaging idler sprocket. EL
CAUTION:
Be careful not to tear or damage the cylinder head gasket.
IDX

SEM143E

EM-21
TIMING CHAIN
Removal (Cont'd)
11. Wipe off the links of timing chain next to the timing marks
on the sprockets. Put paint marks on the timing chain,
matching them with the timing marks on the cam sprockets
and idler sprocket.
12. Remove cam sprocket bolts, cam sprockets, upper timing
chain tensioner, and upper timing chain.

JEM547G

IDLER SPROCKET
1. Remove upper timing chain.
Refer to ``UPPER TIMING CHAIN'', ``Removal'', EM-21.
2. Support lower timing chain by using a suitable tool to avoid
chain tensioner spring from coming out.
NOTE:
This step is only to be applied when the lower cover is not
being removed.

LEL009

3. Remove the idler sprocket bolt.
4. Remove the idler sprocket.

AEM321

LOWER TIMING CHAIN
1. Drain coolant by removing the cylinder block drain plug and
opening the radiator drain cock. Refer to MA section,
(``Changing Engine Coolant'').
2. Remove oil pan.
Refer to ``Removal'', ``OIL PAN'', EM-15.
3. Remove the power steering pump and position it to the side.
Remove the idler pulley and bracket.
4. Set No. 1 piston at TDC on its compression stroke.
AMA098

5. Remove the crankshaft pulley.
6. Remove the oil separator.
7. Remove the front cover.
CAUTION:
Be careful not to tear or damage the cylinder head gasket.
NOTE:
Engine may need to be lowered to provide clearance for the
timing cover to clear the frame. Engine height may need to
be adjusted when removing the cover.
SEM146E

EM-22
TIMING CHAIN
Removal (Cont'd)
8. Remove the following parts:
q Lower timing chain tensioner (Push piston and insert a suit-
able pin into pin hole.) GI
q Chain tension arm
q Lower timing chain guide
q Oil pump drive spacer MA
9. Remove the idler sprocket. Refer to ``IDLER SPROCKET'',
``Removal'', EM-22.
EM
AEM087

10. Wipe off the links of the timing chain next to the timing LC
marks on the sprockets. Put paint marks on the timing
chain, matching them with the timing marks on the crank-
EC
shaft sprocket and idler sprocket.
11. Remove the lower timing chain and sprocket.
FE

RA
AEM482
BR
Inspection
Check for cracks and excessive wear at roller links.
Replace chain if necessary. ST

BT
AEM403
HA

IDX

AEM088

EM-23
TIMING CHAIN

Installation
LOWER TIMING CHAIN
1. Install crankshaft sprocket and oil pump drive spacer.
q Make sure that mating marks of crankshaft sprocket
face front of engine.
2. Position crankshaft so that No. 1 piston is set at TDC on
compression stroke.
3. Install the idler sprocket and lower timing chain using the
mating marks and the paint marks made during the removal
process.
CAUTION:
Be careful not to tear or damage the cylinder head gasket.
4. Install chain guide and chain tension arm.
5. Install lower chain tensioner and remove the pin securing
the piston into the tensioner body.
6. Install oil pump drive spacer.

AEM325

7. Front cover installation:
q Using a scraper or other suitable tool remove all traces of
liquid gasket from the cylinder block and front cover mating
surfaces.
q Install a new crankshaft seal in front of cover.
q Be sure to install new front oil seal. Refer to EM-26.
q Apply a continuous bead of liquid gasket to front cover.
Refer to EM-20.
q Also place RTV sealant on the head gasket surface.
NOTE:
SEM715A
USE Genuine RTV silicone sealant Part No. 999MP-A7007 or
equivalent.

q Install front cover to the engine.
CAUTION:
Be careful not to tear or damage the cylinder head gasket.
8. Install oil pan. Refer to ``Installation'', ``OIL PAN'', EM-17.
9. Install the following parts:
q Crankshaft pulley.
q A/C compressor and idler pulley bracket.
q Power steering pump.

SEM292D

EM-24
TIMING CHAIN
Installation (Cont'd)
UPPER TIMING CHAIN
1. Install lower timing chain (if removed). Refer to ``LOWER
TIMING CHAIN'', ``Installation'', EM-24. GI

EM
SEM548G

2. Install upper timing chain and sprockets, to the painted ref- LC
erence marks made during removal.
3. Install chain tensioner. Remove the pin holding the ten-
EC
sioner piston in the bore of the tensioner.
4. Install camshaft sprocket cover.
q Use a scraper to remove all traces of liquid gasket from FE
mating surfaces of the engine block and camshaft sprocket
cover.
q Apply a continuous bead of RTV sealant to the cover. Refer CL
to EM-20.
SEM549G q Also place RTV sealant on the head gasket surface.
MT
NOTE:
Use Nissan Genuine RTV silicone sealant, Part No. 999 MP-
A7007 or equivalent. AT
CAUTION:
Be careful not to tear or damage the cylinder head gasket.
CAUTION: FA
Be careful upper timing chain does not slip or jump when
installing camshaft sprocket cover.
RA
JEM547G
BR
5. Install rocker cover using the following procedure:
a. Tighten nuts and bolts 1 - 5 - 6 - 4 in that order to
4 N m (0.4 kg-m, 35 in-lb). ST
b. Tighten nuts and bolts to 1 to 11 in numerical order to
8 to 11 N m (0.8 to 1.1 kg-m, 69 to 95 in-lb).
Install all spark plugs with high-tension cords. RS
6. Install upper right engine mount and bracket.
7. Remove the engine slinger at the right rear of the cylinder
head. BT
8. Install power steering fluid reservoir tank.
AEM089 9. Install generator support bracket and generator.
10. Install power steering, generator and A/C compressor drive HA
belts.
11. Install vacuum hoses, electrical harnesses and connectors.
12. Install the spark plug wires. EL

IDX

EM-25
OIL SEAL REPLACEMENT

Valve Oil Seal
1. Remove rocker cover.
2. Remove camshaft. Refer to EM-21.
3. Remove valve spring and valve oil seal with Tool or suitable
tool.
q Piston must be set at TDC to prevent valve from falling.
4. Apply engine oil to new valve oil seal and install it with Tool.

SEM289D

SEM290D

Front Oil Seal
1. Remove radiator shroud and crankshaft pulley.
2. Remove front oil seal.
q Be careful not to scratch front cover.

SEM150E

3. Apply engine oil to new oil seal and install it using a suitable
tool.
q Install new oil seal in the direction shown.

SEM715A

SEM151E

EM-26
OIL SEAL REPLACEMENT

Rear Oil Seal
1. Remove drive plate or flywheel.
2. Remove rear oil seal retainer. GI
3. Remove traces of liquid gasket using scraper.

EM
SEM896A

4. Remove rear oil seal from rear oil seal retainer. LC
q Be careful not to scratch rear oil seal retainer.
EC

CL
SEM895A
MT
5. Apply engine oil to new oil seal and install it using a suitable
tool.
q Install new oil seal in the direction shown. AT

RA
SEM715A
BR

BT
SEM897A
HA
6. Apply a continuous bead of liquid gasket to mating surface
of rear oil seal retainer.
q Use Genuine RTV silicone sealant Part No. 999MP- EL
A7007 or equivalent.
q Apply around inner side of bolt holes.
IDX

SEM144B

EM-27
ACCEL-DRUM UNIT

Adjustment
Adjust accel-drum unit after any of the following parts are
installed:
q Accel-drum unit
q Throttle body
q Rod (Always replace with a new one after removal.)
1. Install accel-drum unit and throttle body.
2. Apply grease all over the inside of the rod couplings.
Use Genuine NISSAN grease or equivalent.
3. Attach each coupling to ball links on throttle body and accel-
drum unit.

AEM191

4. Loosen lock nut.
5. Loosen adjusting screw.

SEM148E

6. Manually turn accel-drum until throttle valve is fully open.
q Check that stopper lever is not touching adjusting
screw.
If it is, loosen adjusting screw to maintain clearance
between the two.

AEM192

EM-28
ACCEL-DRUM UNIT
Adjustment (Cont'd)
7. Turn adjusting screw until it touches stopper lever.
8. Release accel-drum.
GI

EM
SEM208D

9. Turn adjusting screw 3 rotations clockwise. LC
10. Tighten lock nut to specification.
EC

CL
SEM209DA
MT

IDX

EM-29
CYLINDER HEAD

WEM058

EM-30
CYLINDER HEAD

CAUTION:
q When installing camshafts, chain tensioners, oil seals,
or other sliding parts, lubricate contacting surfaces GI
with new engine oil.
q Apply new engine oil to threads and seat surfaces when
installing cylinder head, camshaft sprocket, crankshaft MA
pulley, and camshaft bracket.
q Attach tags to valve lifters so as not to mix them up.
q Before removing camshaft and idler sprockets, apply EM
paint marks to them for retiming.

Removal LC
1. Remove upper timing chain and idler sprocket.
Refer to ``TIMING CHAIN'', ``Removal'', ``UPPER TIMING EC
CHAIN'', EM-21.
q For retiming during cylinder head removal/installation,
apply paint marks to camshaft sprockets, upper timing FE
chain, lower timing chain and idler sprocket.

MT
2. Remove camshaft brackets and camshafts.
q Mark these parts original positions for reassembly.
3. Remove cylinder head bolts in numerical order. AT
q Removing bolts in incorrect order could result in a
warped or cracked cylinder head.
FA

RA
AEM322
BR
q Loosen cylinder head bolts in two or three steps.
4. Remove cylinder head and cylinder head gasket.
ST

BT
SEM274D
HA
Installation
1. Tighten cylinder head bolts in numerical order using the fol-
lowing procedure: EL
a. Tighten all bolts to 29 N m (3.0 kg-m, 22 ft-lb).
b. Tighten all bolts to 79 N m (8.1 kg-m, 59 ft-lb).
IDX

SEM275D

EM-31
CYLINDER HEAD
Installation (Cont'd)
c. Loosen all bolts completely.
d. Tighten all bolts to 25 to 34 N m (2.5 to 3.5 kg-m, 18 to 25
ft-lb).
e. Turn all bolts 86 to 91 degrees clockwise. If angle wrench
is not available, mark all cylinder head bolts on the side
facing engine front. Then, turn each cylinder head bolt 86 to
91 degrees clockwise.

SEM276D

2. Install camshafts and camshaft brackets in the order shown
using the following procedure.
a. Set camshafts and camshaft brackets.
q Dowel pins of both intake and exhaust camshafts
should be at 12 o'clock positions when installing the
camshafts.
q Apply liquid gasket on the back of No. 6 camshaft
bracket on the exhaust side.
b. Tighten all bolts to 2 N m (0.2 kg-m, 17 in-lb).
c. Tighten all bolts to 9.0 to 11.8 N m (0.92 to 1.2 kg-m, 79.9
AEM322
to 104.2 in-lb).
q Apply new engine oil to bolt threads and seat surfaces.
3. Install upper timing chain and idler sprocket.
Refer to ``TIMING CHAIN'', ``Installation'', ``UPPER TIM-
ING CHAIN'' EM-25.

Disassembly
1. Remove intake manifold and exhaust manifold. Refer to
"Outer Components Parts", EM-10.
2. Remove valve components with Tool.
3. Remove valve oil seal with a suitable tool. Refer to OIL
SEAL REPLACEMENT, EM-26.
CAUTION:
Keep parts in order so that they can be installed in their
original positions during assembly.
SEM692D

Inspection
CYLINDER HEAD DISTORTION
q Clean surface of cylinder head.
q Use a reliable straightedge and feeler gauge to check the
flatness of cylinder head surface.
q Check along six positions shown in figure.
Head surface flatness:
Standard: Less than 0.03 mm (0.0012 in)
Limit: 0.1 mm (0.004 in)
SEM294D If beyond the specified limit, replace or resurface.

EM-32
CYLINDER HEAD
Inspection (Cont'd)
Resurfacing limit:
The limit for cylinder head resurfacing is determined by the
cylinder block resurfacing.
Amount of cylinder head resurfacing is ``A''. GI
Amount of cylinder block resurfacing is ``B''.
The maximum limit is as follows:
A + B = 0.2 mm (0.008 in) MA
After resurfacing cylinder head, check that camshaft rotates freely
by hand. If

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