NISSAN PRIMERA 1999 Electronic Repair Manual

DISASSEMBLY AND ASSEMBLYNCLC0006
1. Oil pump cover
2. Inner gear
3. Outer gear
4. Front cover5. Gasket
6. Oil strainer
7. Regulator valve8. Spring
9. Washer
10. Plug
INSPECTIONNCLC0007
Using a feeler gauge, check the following clearances.
Standard clearance:
Unit: mm (in)
Body to outer gear radial clearance10.250 - 0.325 (0.0098 - 0.0128)
Inner gear to outer gear tip clearance2Below 0.18 (0.0071)
Body to inner gear clearance30.030 - 0.085 (0.0012 - 0.0033)
Body to outer gear axial clearance40.030 - 0.090 (0.0012 - 0.0035)
Inner gear to brazed portion of housing
clearance50.045 - 0.091 (0.0018 - 0.0036)
SEM854FA
SEC. 135⋅150
39 - 59 (4.0 - 6.0, 29 - 43) : Lubricate with new engine oil.
: Use Genuine Liquid Gasket or equivalent.
: Do not re-use.
:N·m (kg-m; in-lb)
:N·m (kg-m, ft-lb)6.3 - 8.3 (0.64 - 0.85, 55.6 - 73.8)7.8 - 12.7
(0.80 - 1.30, 69.4 - 112.8) 7.8 - 10.8 (0.80 - 1.10, 69.4 - 95.5)
SEM855F Feeler gauge
Front cover
SEM856F Straightedge
Feeler gauge Front cover
ENGINE LUBRICATION SYSTEMQG
Oil Pump (Cont’d)
LC-6

If the tip clearance (2) exceeds the limit, replace gear set.

If body to gear clearances (1, 3, 4, 5) exceed the limit,
replace front cover assembly.
REGULATOR VALVE INSPECTIONNCLC0008
1. Visually inspect components for wear and damage.
2. Check oil pressure regulator valve sliding surface and valve
spring.
3. Coat regulator valve with engine oil.
Check that it falls smoothly into the valve hole by its own
weight.
If damaged, replace regulator valve set or front cover assem-
bly.
4. Check regulator valve to front cover clearance.
Clearance:
6 : 0.052 - 0.088 mm (0.0020 - 0.0035 in)
If it exceeds the limit, replace front cover assembly.
Oil FilterNCLC0010The oil filter is a small, full-flow cartridge type and is provided with
a relief valve.

The new and previous oil filter designs differ from each
other and are not interchangeable.

Use Tool KV10115801 for removing oil filter.
SEM857F Inside micrometer
Front cover
Micrometer
Inner gear
SLC986AA Spring
Regulator valveWasher
Plug
SLC101B Front
cover
Regulator valve
SLC972A Oil filter body
Relief valve
Filtering paper
Screw
PackingBody
color
(gray)
Label
(red)
ENGINE LUBRICATION SYSTEMQG
Oil Pump (Cont’d)
LC-7

Cooling CircuitNCLC0016
System CheckNCLC0017WARNING:
Never remove the radiator cap when the engine is hot. Serious
burns could occur from high pressure fluid escaping from the
radiator.
Wrap a thick cloth around the cap. Slowly turn it a quarter turn
to allow built-up pressure to escape. Carefully remove the cap
by turning it all the way.
CHECKING COOLING SYSTEM HOSESNCLC0017S01
Check hoses for the following:

Improper attachment

Leaks

Cracks

Damage

Loose connections

Chafing

Deterioration
SEM939F Radiator
Water inlet
Thermostat
Thermostat housing
Water pump
Cylinder block
Cylinder head
Thermostat housing
Water outletThrottle bodyEGR valveHeater Reservoir tankThermostat: CLOSED
Thermostat: OPEN
ENGINE COOLING SYSTEMQG
Cooling Circuit
LC-8

CHECKING COOLING SYSTEM FOR LEAKSNCLC0017S02
To check for leakage, apply pressure to the cooling system with a
tester.
Testing pressure:
157 kPa (1.57 bar, 1.6 kg/cm
2, 23 psi)
CAUTION:
Higher pressure than specified may cause radiator damage.
CHECKING RADIATORNCLC0017S04
Check radiator for mud or clogging. If necessary, clean radiator as
follows.

Be careful not to bend or damage the radiator fins.

When radiator is cleaned without removal, remove all sur-
rounding parts such as cooling fan, radiator shroud and horns.
Then tape the harness and connectors to prevent water from
entering.
1. Apply water by hose to the back side of the radiator core ver-
tically download.
2. Apply water again to all radiator core surfaces once per
minute.
3. Stop washing if any stains no longer flow out from the radia-
tor.
4. Blow air into the back side of radiator core vertically download.

Use compressed air lower than 490 kPa (4.9 bar, 5 kg/cm
2,
71 psi) and keep distance more than 30 cm (11.8 in).
5. Blow air again into all the radiator core surfaces once per
minute until no water sprays out.
CHECKING RADIATOR CAPNCLC0017S03
To check radiator cap, apply pressure to cap with a tester.
Radiator cap relief pressure:
Standard
78-98kPa
(0.78 - 0.98 bar, 0.8 - 1.0 kg/cm
2, 11 - 14 psi)
Limit
59-98kPa
(0.59 - 0.98 bar, 0.6 - 1.0 kg/cm
2,9-14psi)
Pull the negative pressure valve to open it.
Check that it closes completely when released.
ULC015 EG17650301
SLC613-A
SMA967B
ENGINE COOLING SYSTEMQG
System Check (Cont’d)
LC-9

Water Pump
REMOVAL AND INSTALLATIONNCLC0018
CAUTION:

When removing water pump assembly, be careful not to
get coolant on drive belt.

Water pump cannot be disassembled and should be
replaced as a unit.

After installing water pump, and check for leaks using
radiator cap tester.
1. Drain coolant from radiator and cylinder block.
Refer to MA section (“Changing Engine Coolant”,“ENGINE
MAINTENANCE”).
2. Remove cylinder head front mounting bracket.
3. Remove drive belts and idler pulley.
4. Loosen water pump pulley bolts.
5. Remove water pump pulley.
6. Remove water pump bolts.
7. Remove water pump with gasket.
8. Reinstall parts in reverse order of removal.
SEM858F
17 - 24 (1.7 - 2.4, 12 - 17)
Water pump
6.3 - 8.3 (0.64 - 0.85, 55.6 - 73.8)
Do not re-use
:N·m (kg-m, in-lb)
:N·m (kg-m, ft-lb)Water pump pulley
17 - 24 (1.7 - 2.4, 12 - 17)
GasketSEC. 210
SEM869F Drain plug
SEM859F Water pump
ENGINE COOLING SYSTEMQG
Water Pump
LC-10

INSPECTIONNCLC0019

Check body assembly and vane for rust or corrosion.

Check for rough operation due to excessive end play.
Thermostat
REMOVAL AND INSTALLATIONNCLC0021

Be careful not to spill coolant over engine compartment.
Use a rag to absorb coolant.

Use Genuine Liquid Gasket or equivalent.
1. Drain engine coolant.
2. Remove lower radiator hose.
3. Remove water inlet, then take out thermostat.
4. Install gum ring to thermostat.
SEM860F
SEM861F
17 - 24 (1.7 - 2.4, 12 - 17)
Thermostat housing
Bracket
6.0 - 7.7
(0.61 - 0.79,
52.9 - 68.6)
Water inlet
6.3 - 8.3
(0.64 - 0.85,
55.6 - 73.8) Thermostat
From lower radiator hoseGum ring
6.7 - 7.8
(0.68 - 0.80,
59.0 - 69.4)
Washer
17 - 24 (1.7 - 2.4, 12 - 17)
17 - 24 (1.7 - 2.4, 12 - 17) Do not re-use.
:N·m (kg-m, in-lb)
:N·m (kg-m, ft-lb) Engine frontTo upper radiator hoseWater outlet
Gasket
SEC. 210
SEM862F Gum ring
Thermostat flangeUpper
Jiggle valve
(top side)
ENGINE COOLING SYSTEMQG
Thermostat
LC-11

5. Install thermostat with jiggle valve or air bleeder at upper side.

After installation, run engine for a few minutes, and check
for leaks.
INSPECTIONNCLC0022
1. Check for valve seating condition at normal room temperature.
It should seat tightly.
2. Check valve opening temperature and valve lift.
Valve opening temperature°C(°F) 82 (180)
Valve lift mm/°C (in/°F)More than 9/95 (0.35/203)
3. Then check if valve closes at 5°C (41°F) below valve opening
temperature.
SEM863F Jiggle valveJiggle valve position
Thermostat
housing
Thermostat
SLC343
ENGINE COOLING SYSTEMQG
Thermostat (Cont’d)
LC-12

Radiator
COMPONENTS=NCLC0025
1Reservoir tank
2Reservoir hose
3Radiator cap
4Mounting bracket
5Upper radiator hose
6Mounting rubber
7Cooling fan motor
8Radiator
9Lower radiator hose
10Cooling fan
11Cooling fan motor shield
NLC086
:N·m (kg-m, in-lb)
3.8 - 4.5
(0.39 - 0.45,
34 - 39)
4.0 - 4.5
(0.41 - 0.45,
36 - 39)
3.25 - 4.25
(0.34 - 0.43,
29 - 37)
4.0 - 4.5
(0.41 - 0.45,
36 - 39)
ENGINE COOLING SYSTEMQG
Radiator
LC-13

Cooling Fan Control SystemNCLC0026
Cooling fans are controlled by the ECM. For details, refer to EC
section [TROUBLE DIAGNOSIS FOR OVERHEAT (COOLING
SYSTEM)].
Refilling Engine CoolantNCLC0027
For details on refilling engine coolant, refer to MA section
(“ENGINE MAINTENANCE”,“Changing Engine Coolant”, MA-30)
ENGINE COOLING SYSTEMQG
Radiator (Cont’d)
LC-14

Lubrication Circuit
SLC093B Return
Feed
Relief valve
Oil filter
Oil filter bracket
Oil cooler
Oil pump
Oil strainerCamshaft
Hydraulic lash adjuster
Oil pan
NLC043 Oil gallery
Oil passage
By-pass passage
To oil pan Regulator valve
(Built into oil pump)
Relief valve
Relief valve
(Built into oil filter) Oil pan
Oil strainer
Oil pump
Oil filter
Oil cooler
Chain tensioner
Timing chain Main gallery
Cylinder head oil
gallery
Hydraulic lash
adjuster Camshaft
journal Main bearing
Connecting rod bearing
Connecting rod
Piston and cylinder
ENGINE LUBRICATION SYSTEMSR20DE
Lubrication Circuit
LC-15