1999 NISSAN PRIMERA heater

Cooling Circuit
SLC085B Bottom by-pass
Oil coolerTo radiator
From
turbocharger
: By-pass passage Radiator cap
Reservoir tank
Radiator
Water inlet
Thermostat
Water pump
Cylinder block
Cylinder head
Water outletHeater unit
Oil cooler
Turbocharger Thermostat
ENGINE COOLING SYSTEMCD20T
Cooling Circuit
LC-31

Thermostat
REMOVAL AND INSTALLATION
1. Drain engine coolant.
2. Remove lower radiator hose.
3. Remove water inlet, then take out thermostat.
4. Before installing thermostat, remove all traces of liquid gasket
from mating surface of each part using a scraper.
5. Apply liquid gasket to water outlet, thermostat housing and
water inlet.
6. Install thermostat with jiggle valve uppermost.

After installation, run engine for a few minutes, and check
for leaks.
SLC564AA
SEC. 210-211Water outlet
16 - 21 (1.6 - 2.1, 12 - 15)
From oil cooler
From heater unit
16 - 21 (1.6 - 2.1, 12 - 15)
Up
Thermostat
Thermostat housing
Water inlet
16 - 21 (1.6 - 2.1, 12 - 15)
2.5±0.5
(0.098±0.020)
dia.2.5 (0.098)
3.5 (0.138)
Bolt hole
2.5±0.5 (0.098±0.020) dia.
2.5±0.5
(0.098±0.020) dia.Bolt hole
2.5±0.5 (0.098±0.020) dia.
2.5±0.5
(0.098±0.020) dia.
Unit: mm (in)
:N·m (kg-m, ft-lb)
SLC097 Air bleederUpper
Jiggle valve
ENGINE COOLING SYSTEMCD20T
Thermostat
LC-34

Changing Engine Coolant
WARNING:
To avoid being scalded, never change the coolant when the
engine is hot.
—DRAINING ENGINE COOLANT—
Heater
1. Set heater system as follows to prevent coolant from remain-
ing in the system.

Move temperature control dial all the way to“HOT”.
Semi-automatic air conditioning
1. Set air conditioning system as follows to prevent coolant from
remaining in the system.
a. Turn ignition switch“ON”and enter a temperature of 32°Con
the heater control.
b. Wait 30 seconds before turning ignition switch“OFF”.
2. Disconnect lower radiator hose and remove radiator cap.
3. Remove reservoir tank, drain coolant, then clean reservoir
tank.
Install it temporarily.

Be careful not to allow coolant to contact drive belts.
4. Remove cylinder block drain plug and air relief plug.
5. Check drained coolant for contaminants such as rust, corro-
sion or discoloration.
If contaminated, flush engine cooling system.
Refer to“FLUSHING COOLING SYSTEM”, MA-21.
NMA104 Turn to HOT
Temperature control dial
NMA103 Temperature control
NMA051 Front
.Loosen
.Radiator cap
.Front.Lower
radiator
hose
NMA001 Drain plug
Loosen
Air relief plug
NMA107
ENGINE MAINTENANCEQG
MA-19

—REFILLING ENGINE COOLANT—
6. Install lower radiator hose, reservoir tank and tighten cylinder
block drain plug securely.

Apply sealant to the thread of the cylinder block drain
plug.
:34-44N·m (3.5 - 4.5 kg-m, 25 - 33 ft-lb)
7. Fill up radiator with coolant at the speed of less than 3
(2-5/8
Imp qt)/min.

If coolant spills from the air relief hole without bubbles, rein-
stall the plug.
Air relief plug:
:7-8N·m (0,7 - 0,8 kg-m, 5,1 - 5,8 ft-lb)
Then pour coolant in again.

Use genuine NISSAN Anti-Freeze Coolant or equivalent.
Refer to“RECOMMENDED FLUIDS AND LUBRICANTS”,
MA-16.
Coolant capacity (With reservoir tank):
Unit: (Imp qt)
QG16DE/QG18DE6.1 (5-3/8)
8. Fill radiator and reservoir tank to specified level.
9. Start engine without installing radiator cap and warm it up at
2,000 rpm until radiator lower hose becomes hot.

If coolant level becomes low, refill coolant until coolant level
does not change.

If coolant overflows radiator filler hole, install filler cap.
10. Run engine at 2,500 rpm for 10 seconds and return to idle
speed.

Repeat 2 or 3 times.
Watch coolant temperature gauge so as not to overheat the
engine.
11. Stop engine and wait until it cools down.

If necessary, refill radiator up to filler neck.
12. Refill reservoir tank to Max line with coolant.
13. Repeat steps 9 through 12 two or more times with radiator
cap installed until coolant level no longer drops.
14. Check cooling system for leaks with engine running.
15. Warm up engine, and check for sound of coolant flow while
running engine from idle up to 3,000 rpm with heater tem-
perature control set at several positions between COOL and
HOT.

Sound may be noticeable at heater water cock.
16. If the sound is heard, bleed air from cooling system by
repeating steps 9 through 12 until coolant level no longer
drops.
SMA182B Radiator
SMA412B MAX.
MIN.
ENGINE MAINTENANCEQG
Changing Engine Coolant (Cont’d)
MA-20

Changing Engine Coolant
WARNING:
To avoid being scalded, never change the coolant when the
engine is hot.
Heater
—DRAINING ENGINE COOLANT—
1. Set heater system as follows to prevent coolant from remain-
ing in the system.

Move temperature control dial all the way to“HOT”.
Semi-automatic air conditioning
1. Set air conditioner system as follows to prevent coolant from
remaining in the system.
a. Turn ignition switch“ON”and enter a temperature of 32°Con
the heater control.
b. Wait 30 seconds before turning ignition switch“OFF”.
2. Disconnect lower radiator hose and remove radiator cap.
3. Remove reservoir tank, drain coolant, then clean reservoir
tank.
Install it temporarily.

Be careful not to allow coolant to contact drive belts.
SMA328C Alternator drive belt fitting place
(Models without air conditioner)
Alternator drive belt
Crankshaft pulley
Engine
front
Alternator drive belt
Engine
front
Alternator
pulley Set a belt in both crankshaft
and alternator pulleys as
shown in the figure.
NMA104 Turn to HOT
Temperature control dial
NMA103 Temperature control
.SMA285C Lower radiator
hose
Remove
ENGINE MAINTENANCESR20DE
Checking Drive Belts (Cont’d)
MA-29

8. Fill radiator and reservoir tank to specified level.
9. Start engine without installing radiator cap and warm it up at
2,000 rpm until radiator lower hose becomes hot.

If coolant level becomes low, refill coolant until coolant level
does not change.

If coolant overflows radiator filler hole, install filler cap.
10. Run engine at 2,500 prm for 10 seconds and return to idle
speed.

Repeat 2 or 3 times.
Watch coolant temperature gauge so as not to overheat the
engine.
11. Stop engine and cool it down.

Cool down using a fan to reduce the time.

If necessary, refill radiator up to filler neck.
12. Refill reservoir tank to Max line with coolant.
13. Repeat steps 9 through 12 two or more times with radiator
cap installed until coolant level no longer drops.
14. Check cooling system for leaks with engine running.
15. Warm up engine, and check for sound of coolant flow while
running engine from idle up to 3,000 rpm with heater tem-
perature control set at several positions between COOL and
HOT.

Sound may be noticeable at heater water cock.
16. If the sound is heard, bleed air from cooling system by
repeating steps 9 through 12 until coolant level no longer
drops.
—FLUSHING COOLING SYSTEM—
1. Open air relief plug.
2. Fill radiator with water until water spills from air relief hole,
then reinstall air relief plug.
Air relief plug:
:7-8N·m (0.7 - 0.8 kg-m, 5,1 - 5.8 ft-lb)
Fill radiator and reservoir tank with water and reinstall radia-
tor cap.
3. Run engine and warm it up sufficiently.
4. Rev engine 2 or 3 times under no-load.

Make sure that blower fan is“OFF”.
5. Stop engine and wait until it cools down.
6. Drain water.
7. Repeat steps 1 through 6 until clear water begins to drain
from radiator.
Checking Cooling System
CHECKING HOSES
Check hoses for proper attachment and for leaks, cracks,
damage, loose connections, chafing and deterioration.
CHECKING RADIATOR
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.
SMA412B MAX.
MIN.
ENGINE MAINTENANCESR20DE
Changing Engine Coolant (Cont’d)
MA-31

Changing Engine Coolant
WARNING:
To avoid being scalded, never change the coolant when the
engine is hot.
—DRAINING ENGINE COOLANT—
Heater
1. Set heater system as follows to prevent coolant from remain-
ing in the system.

Move temperature control dial all the way to“HOT”.
Semi-automatic air conditioning
1. Set air conditioning system as follows to prevent coolant from
remaining in the system.
a. Turn ignition switch“ON”and enter a temperature of 32°Con
the heater control.
b. Wait 30 seconds before turning ignition switch“OFF”.
2. Disconnect lower radiator hose and remove radiator cap.
3. Remove reservoir tank, drain coolant, then clean reservoir
tank.
Install it temporarily.

Be careful not to allow coolant to contact drive belts.
4. Remove cylinder block drain plug and air relief plug.
5. Check drained coolant for contaminants such as rust, corro-
sion or discoloration.
If contaminated, flush engine cooling system.
Refer to“FLUSHING COOLING SYSTEM”, MA-41.
—REFILLING ENGINE COOLANT—
6. Install lower radiator hose, reservoir tank and tighten cylinder
block drain plug securely.

Apply sealant to the thread of the cylinder block drain
plug.
:55-75N·m (5.7 - 7.6 kg-m, 41 - 55 ft-lb)
7. Fill up radiator with coolant at the speed of less than 3
(2-5/8
Imp qt)/min.

If coolant spills from the air relief hole without bubbles, install
the plug and then pour coolant in again.
NMA104 Turn to HOT
Temperature control dial
NMA103 Temperature control
.NLC040
.Radiator
lower hose
NLC041 Drain plug
(cylinder block)
SMA353C Air
bleeder
ENGINE MAINTENANCECD20T
MA-40

Air relief plug:
:8-9N·m (0.8 - 0.9 kg-m, 5.9 - 6.6 ft-lb)

Use genuine NISSAN Anti-Freeze Coolant or equivalent.
Refer to“RECOMMENDED FLUIDS AND LUBRICANTS”,
MA-16.
Coolant capacity (With reservoir tank):
Unit:
(Imp qt)
CD20T6.1 (5-3/8)
8. Fill radiator and reservoir tank to specified level.
9. Start engine without installing radiator cap and warm it up at
2,000 rpm until radiator lower hose becomes hot.

If coolant level becomes low, refill coolant until coolant level
does not change.

If coolant overflows radiator filler hole, install filler cap.
10. Run engine at 2,500 prm for 10 seconds and return to idle
speed.

Repeat 2 or 3 times.
Watch coolant temperature gauge so as not to overheat the
engine.
11. Stop engine and wait until it cools down.

If necessary, refill radiator up to filler neck.
12. Refill reservoir tank to Max line with coolant.
13. Repeat steps 9 through 12 two or more times with radiator
cap installed until coolant level no longer drops.
14. Check cooling system for leaks with engine running.
15. Warm up engine, and check for sound of coolant flow while
running engine from idle up to 3,000 rpm with heater tem-
perature control lever set at several positions between COOL
and HOT.

Sound may be noticeable at heater water cock.
16. If the sound is heard, bleed air from cooling system by
repeating steps 9 through 12 until coolant level no longer
drops.
—FLUSHING COOLING SYSTEM—
1. Open air relief plug.
2. Fill radiator with water until water spills from the air relief
hole, then close air relief plug.
Air relief plug
:7-8N·m (0.7 - 0.8 kg-m, 5.1 - 5.8 ft-lb)
Fill radiator and reservoir tank with water and reinstall radia-
tor cap.
3. Run engine and warm it up sufficiently.
4. Rev engine 2 or 3 times under no-load.

Make sure that blower is“OFF”.
5. Stop engine and wait until it cools down.
6. Drain water.
7. Repeat steps 1 through 6 until clear water begins to drain
from radiator.
SMA182B Radiator
SMA412B MAX.
MIN.
ENGINE MAINTENANCECD20T
Changing Engine Coolant (Cont’d)
MA-41