1999 NISSAN PICK-UP engine coolant

Use the chart below to find out what each wiring diagram code
stands for.
Refer to the wiring diagram code in the alphabetical index to find
the location (page number) of each wiring diagram.
Code Section Wiring Diagram Name
AAC/V EC IACV-AAC Valve
ABS BR Anti-lock Brake System
A/C, M HA Manual Air Conditioner
A/C, A HA Auto Air Conditioner
AT/IND EL A/T Indicator
AUDIO EL Audio
BACK/L EL Back-up Lamp
BA/FTS ATBATT/A/T Fluid Temperature Sensor
and TCM Power Supply
CHARGE EL Charging System
CHIME EL Warning Chime
CHOKE EC Automatic Choke
CIGAR EL Cigarette Lighter
CLOCK EL Clock
CMPS EC Camshaft Position Sensor
COOL/F LC Cooling Fan Control
DEF ELRear Window Defogger and Mirror
Defogger
DIMDIP ELHeadlamp Ð With Dim-dip Lamp
System
D/LOCK EL Power Door Lock
DTRL ELHeadlamp Ð With Daytime Light
System
ECTS ECEngine Coolant Temperature
Sensor
EGRC/V EC EGRC Ð Solenoid Valve
ENGSS AT Engine Speed Signal
FCUT EC Fuel Cut Solenoid Valve
F/HEAT EC Fuel Heater System
FICD EC IACV-FICD Solenoid Valve
FIPOT EC ISC-FI Pot
FPCM EC Fuel Pump Control Module
F/PUMP EC Fuel Pump
GLOW EC Quick-glow System
H/AIM EL Headlamp Aiming Control
HEATER HA Heater
H/LAMP EL Headlamp
HLC EL Headlamp Washer
HO2S EC Heated Oxygen Sensor
HORN EL Horn
H/SEAT EL Heated SeatCode Section Wiring Diagram Name
IGN EC Ignition System
IGN/SG EC Ignition Signal
ILL EL Illumination
INJECT EC Injector
INT/L EL Spot Lamp
KS EC Knock Sensor
LOAD EC Electric Load Signal
LPSV AT Line Pressure Solenoid Valve
MAFS EC Mass Air Flow Sensor
MAIN EC, ATMain Power Supply and Ground Cir-
cuit
METER ELSpeedometer, Tachometer, Temp.
and Fuel Gauges
MIL/DL ECMIL and Data Link Connector For
CONSULT
MIRROR EL Power Door Mirror
MULTI EL Multi-remote Control System
NATS EL Nissan Anti-theft System
NONDTC AT Non-detectable Items
OVRCSV AT Overrun Clutch Solenoid Valve
P/ANT EL Power Antenna
PGC/V ECEVAP Canister Purge
Control Solenoid Valve
PLA EC Partial Load Advance Control
PNP/SW EC Park/Neutral Position Switch
POWER EL Power Supply Routing
PST/SW EC Power Steering Oil Pressure Switch
R/FOG EL Rear Fog Lamp
ROOM/L EL Interior Room Lamp
SHIFT AT Shift Lock System
SSV/A AT Shift Solenoid Valve A
SSV/B AT Shift Solenoid Valve B
SRS RS Supplemental Restraint System
S/SIG EC Start Signal
START EL Starting System
STOP/L EL Stop Lamp
SWL/V ECSwirl Control Valve Control Solenoid
Valve
TAIL/L EL Parking, License and Tail Lamps
TCV ATTorque Converter Clutch Solenoid
Valve
WIRING DIAGRAM CODES (CELL CODES)
EL-2171

Use the chart below to find out what each wiring diagram code
stands for.
Refer to the wiring diagram code in the alphabetical index to find
the location (page number) of each wiring diagram.
Code Section Wiring Diagram Name
AAC/V EC IACV-AAC Valve
ABS BR Anti-lock Brake System
A/C, M HA Manual Air Conditioner
A/C, A HA Auto Air Conditioner
AT/IND EL A/T Indicator
AUDIO EL Audio
BACK/L EL Back-up Lamp
BA/FTS ATBATT/A/T Fluid Temperature Sensor
and TCM Power Supply
CHARGE EL Charging System
CHIME EL Warning Chime
CHOKE EC Automatic Choke
CIGAR EL Cigarette Lighter
CLOCK EL Clock
CMPS EC Camshaft Position Sensor
COOL/F LC Cooling Fan Control
DEF ELRear Window Defogger and Mirror
Defogger
DIMDIP ELHeadlamp Ð With Dim-dip Lamp
System
D/LOCK EL Power Door Lock
DTRL ELHeadlamp Ð With Daytime Light
System
ECTS ECEngine Coolant Temperature
Sensor
EGRC/V EC EGRC Ð Solenoid Valve
ENGSS AT Engine Speed Signal
FCUT EC Fuel Cut Solenoid Valve
F/HEAT EC Fuel Heater System
FICD EC IACV-FICD Solenoid Valve
FIPOT EC ISC-FI Pot
FPCM EC Fuel Pump Control Module
F/PUMP EC Fuel Pump
GLOW EC Quick-glow System
H/AIM EL Headlamp Aiming Control
HEATER HA Heater
H/LAMP EL Headlamp
HLC EL Headlamp Washer
HO2S EC Heated Oxygen Sensor
HORN EL Horn
H/SEAT EL Heated SeatCode Section Wiring Diagram Name
IGN EC Ignition System
IGN/SG EC Ignition Signal
ILL EL Illumination
INJECT EC Injector
INT/L EL Spot Lamp
KS EC Knock Sensor
LOAD EC Electric Load Signal
LPSV AT Line Pressure Solenoid Valve
MAFS EC Mass Air Flow Sensor
MAIN EC, ATMain Power Supply and Ground Cir-
cuit
METER ELSpeedometer, Tachometer, Temp.
and Fuel Gauges
MIL/DL ECMIL and Data Link Connector For
CONSULT
MIRROR EL Power Door Mirror
MULTI EL Multi-remote Control System
NATS EL Nissan Anti-theft System
NONDTC AT Non-detectable Items
OVRCSV AT Overrun Clutch Solenoid Valve
P/ANT EL Power Antenna
PGC/V ECEVAP Canister Purge
Control Solenoid Valve
PLA EC Partial Load Advance Control
PNP/SW EC Park/Neutral Position Switch
POWER EL Power Supply Routing
PST/SW EC Power Steering Oil Pressure Switch
R/FOG EL Rear Fog Lamp
ROOM/L EL Interior Room Lamp
SHIFT AT Shift Lock System
SSV/A AT Shift Solenoid Valve A
SSV/B AT Shift Solenoid Valve B
SRS RS Supplemental Restraint System
S/SIG EC Start Signal
START EL Starting System
STOP/L EL Stop Lamp
SWL/V ECSwirl Control Valve Control Solenoid
Valve
TAIL/L EL Parking, License and Tail Lamps
TCV ATTorque Converter Clutch Solenoid
Valve
WIRING DIAGRAM CODES (CELL CODES)
EL-2171

Parts Requiring Angular Tightening
lUse an angle wrench for the final tightening of the following
engine parts:
(1) Cylinder head bolts
(2) Connecting rod cap nuts
lDo not use a torque value for final tightening.
lThe torque values for these parts are for a preliminary step.
lEnsure 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 Liquid Gasket or equivalent.)
lFor oil pan, be sure liquid gasket diameter is 3.5 to 4.5
mm (0.138 to 0.177 in).
lFor areas except oil pan, be sure liquid gasket diam-
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 coating.
e. Wait at least 30 minutes before refilling engine oil and
engine coolant.
SEM164F
AEM080
PRECAUTIONS AND PREPARATIONKA24DE
EM-2002

Removal
CAUTION:
lAfter removing the timing chain, do not turn crankshaft
and camshaft separately, or valves will strike piston
heads.
lWhen installing chain tensioners or other sliding parts,
lubricate contacting surfaces with new engine oil.
lApply new engine oil to bolt threads and seat surfaces
when installing camshaft sprockets and crankshaft pul-
ley.
lDo not spill engine coolant on drive belts.
UPPER TIMING CHAIN
1. Remove air duct assembly.
2. Remove vacuum hoses, electrical harness connectors and
harness clamps.
3. Remove power steering drive belt.
4. Remove power steering pump and position it to one side.
5. Remove power steering pump bracket.
6. Remove idler pulley and bracket as well.
7. Remove ignition wires and spark plugs.
8. Set No. 1 piston at TDC on its compression stroke.
9. Remove rocker cover.
Remove in numerical order as shown.
10. Remove camshaft sprocket cover.
AEM373
AEM356
AEM374
TIMING CHAINKA24DE
EM-2015

11. Remove upper chain tensioner.
(Push in piston and insert a suitable pin into the pin hole.)
12. Wipe off the links of the timing chain next to the timing marks
on the sprockets. Put paint marks on the timing chain, match-
ing them with the timing marks on the cam sprockets and
idler sprocket.
13. Remove cam sprocket bolts, cam sprockets and upper tim-
ing chain.
IDLER SPROCKET
1. Remove upper timing chain.
Refer to ªRemovalº, ªUpper Timing Chainº, EM-2015.
2. Support lower timing chain by using a suitable tool to avoid
chain tensioner spring from coming out.
lThis step is only to be applied when the lower cover is
not being removed.
3. Remove idler sprocket.
LOWER TIMING CHAIN
1. Drain coolant by removing the cylinder block drain plug and
opening the radiator drain cock. Refer to MA section of the
Service Manual.
2. Drain engine oil from drain plug of oil pan.
3. Remove the following parts.
lAlternator drive belt
lA/C compressor drive belt
lCooling fan with coupling
lRadiator shroud
4. Remove A/C compressor and position it to the side. Remove
the idler pulley and bracket as well.
5. Set No. 1 piston to TDC on its compression stroke.
6. Remove distributor.
7. Remove the crankshaft pulley.
SEM988F
SEM989F
AEM373
TIMING CHAINKA24DE
Removal (Cont'd)
EM-2016

CAUTION:
lWhen installing camshafts, chain tensioners, oil seals,
or other sliding parts, lubricate contacting surfaces with
new engine oil.
lApply new engine oil to threads and seat surfaces when
installing cylinder head, camshaft sprocket, crankshaft
pulley, and camshaft bracket.
lAttach tags to valve lifters so as not to mix them up.
lBefore removing camshaft and idler sprockets, apply
paint marks to them for retiming.
Removal
1. Drain coolant from radiator and cylinder block. Refer to MA
section (ªChanging Engine Coolantº, ªENGINE MAINTE-
NANCEº).
2. Remove upper timing chain and idler sprocket.
lRefer to ªUPPER TIMING CHAINº (EM-2015) and ªIDLER
SPROCKETº (EM-2016), ªRemovalº, ªTIMING CHAINº.
lFor retiming during cylinder head removal/installation,
apply paint marks to camshaft sprockets, upper timing
chain, lower timing chain and idler sprocket.
3. Remove camshaft brackets and camshafts.
lMark the original positions of these parts for reassem-
bly.
4. Remove cylinder head bolts in numerical order.
lRemoving bolts in incorrect order could result in a
warped or cracked cylinder head.
lLoosen cylinder head bolts in two or three steps.
5. Remove cylinder head and cylinder head gasket.
Installation
1. Tighten cylinder head bolts in numerical order using the fol-
lowing procedure:
a. Tighten all bolts to 29 Nzm (3.0 kg-m, 22 ft-lb).
b. Tighten all bolts to 79 Nzm (8.1 kg-m, 59 ft-lb).
SEM997F
SEM274D
SEM275D
CYLINDER HEADKA24DE
EM-2025

c. Loosen all bolts completely.
d. Tighten all bolts to 25 to 34 Nzm (2.5 to 3.5 kg-m, 18 to 25
ft-lb).
e. Turn all bolts 86 to 91É 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 91É
clockwise.
2. Install camshafts and camshaft brackets in the order shown
using the following procedure:
a. Set camshafts and camshaft brackets.
b. Tighten all bolts to 2 Nzm (0.2 kg-m, 17 in-lb).
c. Tighten all bolts to 9.1 to 11.7 Nzm (0.92 to 1.2 kg-m, 80 to
104 in-lb).
lApply new engine oil to bolt threads and seat surfaces.
3. Install upper timing chain and idler sprocket.
lRefer to ªUPPER TIMING CHAINº (EM-2019) and ªIDLER
SPROCKETº (EM-2019), ªInstallationº, ªTIMING CHAINº.
4. Refill engine coolant. Refer to MA section (ªChanging Engine
Coolantº, ªENGINE MAINTENANCEº).
Disassembly
1. Remove intake manifold and exhaust manifold. Refer to
ªOUTER COMPONENT PARTSº (EM-2007).
2. Remove valve components.
3. Remove valve oil seal with a suitable tool.
Inspection
CYLINDER HEAD DISTORTION
Clean surface of cylinder head.
Use a reliable straightedge and feeler gauge to check the flat-
ness of cylinder head surface.
Check along six positions shown in the figure.
Head surface flatness:
Standard Less than 0.03 mm (0.0012 in)
Limit 0.1 mm (0.004 in)
If beyond the specified limit, replace it or resurface it.
Resurfacing limit:
SEM276D
SEM998F
SEM692D
SEM294D
CYLINDER HEADKA24DE
Installation (Cont'd)
EM-2026

WARNING:
lPosition vehicle on a flat and solid surface.
lPlace chocks at front and back of rear wheels.
lDo not remove engine until exhaust system has com-
pletely cooled off.
Otherwise, you may burn yourself and/or fire may break
out in fuel line.
lBefore disconnecting fuel hose, release fuel pressure.
Refer to EC section (ªFuel Pressure Releaseº, ªBASIC
SERVICE PROCEDUREº).
lBe sure to hoist engine and transmission in a safe man-
ner.
lFor engines not equipped with engine slingers, attach
proper slingers and bolts described in PARTS CATA-
LOG.
CAUTION:
lWhen lifting engine, be sure to clear surrounding parts.
Take special care near accelerator wire casing, brake
lines and brake master cylinder.
lIn hoisting the engine, always use engine slingers in a
safe manner.
lFor 4WD models, apply sealant between engine and
transmission. Refer to MT section (ªRemoval and Instal-
lationº).
Removal
1. Drain coolant from engine block and radiator. Refer to MA
section (ªChanging Engine Coolantº, ªENGINE MAINTE-
NANCEº).
2. Release fuel pressure. Refer to EC section (ªFuel Pressure
Releaseº, ªBASIC SERVICE PROCEDUREº).
3. Remove negative battery cable.
4. Remove hood. Refer to BT section.
5. Remove air cleaner and air duct.
6. Remove power steering drive belt, alternator drive belt and
A/C compressor drive belt.
7. Remove radiator. Refer to LC section (ªRadiatorº, ªENGINE
COOLING SYSTEMº).
8. Remove exhaust manifold heat shield.
9. Disconnect exhaust system from exhaust manifold.
10. Remove A/C compressor from bracket. Refer to HA section
(ªCompressor Mountingº, ªSERVICE PROCEDURESº).
11. Disconnect accelerator wire, vacuum hoses, electrical
connectors, heater hoses and vacuum booster hose.
ENGINE REMOVALKA24DE
EM-2036