Suzuki Grand Vitara JB416 / JB420. Manual — part 121

1E-20 Engine Lubrication System: For J20 Engine

Special Tools and Equipment

Recommended Service Material

S5JB0A1528001

NOTE
Required service material is also described in the following.
“Oil Pan and Oil Pump Strainer Components: For J20 Engine”

Special Tool

S5JB0A1528002

Material

SUZUKI recommended product or Specification

Note

Water tight sealant

SUZUKI Bond No.1207F

P/No.: 99000–31250

)

09915–77311

09915–78211

Oil pressure gauge

Oil pressure gauge
attachment

)

)

Engine Cooling System: 1F-1

Engine

Engine Cooling System

General Description

Cooling System Description

S5JB0A1601001

The cooling system consists of the radiator cap, radiator,
coolant reservoir, hoses, water pump, cooling fan and
thermostat. The radiator is of tube-and-fin type.

Coolant Description

S5JB0A1601002

WARNING

!

• Do not remove radiator cap to check

engine coolant level; check coolant
visually at the see-through coolant
reservoir. Coolant should be added only to
reservoir as necessary.

• As long as there is pressure in the cooling

system, the temperature can be
considerably higher than the boiling
temperature of the solution in the radiator
without causing the solution to boil.
Removal of the radiator cap while engine is
hot and pressure is high will cause the
solution to boil instantaneously and
possibly with explosive force, spewing the
solution over engine, fenders and person
removing cap. If the solution contains
flammable anti-freeze such as alcohol (not
recommended for use at any time), there is
also the possibility of causing a serious
fire.

• Check to make sure that engine coolant

temperature is cold before removing any
part of cooling system.

• Also be sure to disconnect negative cable

from battery terminal before removing any
part.

The coolant recovery system is standard. The coolant in
the radiator expands with heat, and the coolant is
overflowed to the reservoir.
When the system cools down, the coolant is drawn back
into the radiator.
The cooling system has been filled with a quality coolant
that is a 50/50 mixture of water and ethylene glycol
antifreeze.
This 50/50 mixture coolant solution provides freezing
protection to –36

°C (–33 °F).

• Maintain cooling system freeze protection at –36

°C (–

33

°F) to ensure protection against corrosion and loss

of coolant from boiling. This should be done even if
freezing temperatures are not expected.

• Add ethylene glycol base coolant when coolant has to

be added because of coolant loss or to provide added
protection against freezing at temperature lower than
–36

°C (–33 °F).

NOTE

• Alcohol or methanol base coolant or plain

water alone should not be used in cooling
system at any time as damage to cooling
system could occur.

• Coolant must be mixed with deminerated

water or distilled water.

Anti-freeze proportioning table

Coolant capacity (M16 Engine)
Engine, radiator and heater: 6.1 liters (12.89/10.74
US/lmp pt.)
Reservoir: 0.8 liters (1.69/1.40 US/lmp pt.)
Total: 6.9 liters (14.58/12.14 US/lmp pt.)

Coolant capacity (J20 Engine)
Engine, radiator and heater: 6.6 liters (13.95/11.62
US/lmp pt.)
Reservoir: 0.7 liters (1.48/1.23 US/lmp pt.)
Total: 7.3 liters (15.42/12.85 US/lmp pt.)

For M16

engine

model

For J20

engine

model

Freezing temperature

°C

–36

–36

°F

–33

–33

Anti-freeze / Anti-
corrosion coolant
concentration

%

50

50

Ratio of compound to
cooling water

ltr.

3.45/3.45 3.65/3.65

US pt.

7.29/7.29 7.71/7.71

Imp pt. 6.07/6.07 6.42/6.42

1F-2 Engine Cooling System:

Schematic and Routing Diagram

Coolant Circulation

S5JB0A1602001

While the engine is warmed up (thermostat closed), coolant circulates as follows.

When coolant is warmed up to normal temperature and the thermostat opens, coolant passes through the radiator
core to be cooled as follows.

11

10

3

7

4

9

8

6

5

2

12

1

I5JB0A161001-01

1. Radiator inlet hose

5. Thermostat

9. Heater core inlet hose

2. Radiator outlet hose

6. Water pump

10. Heater core outlet hose

3. Throttle body inlet hose

7. Throttle body

11. Heater core

4. Throttle body outlet hose

8. Engine

12. Radiator

11

10

3

7

4

9

8

6

5

2

12

1

I5JB0A161002-01

1. Radiator inlet hose

5. Thermostat

9. Heater core inlet hose

2. Radiator outlet hose

6. Water pump

10. Heater core outlet hose

3. Throttle body inlet hose

7. Throttle body

11. Heater core

4. Throttle body outlet hose

8. Engine

12. Radiator

Engine Cooling System: 1F-3

Diagnostic Information and Procedures

Engine Cooling Symptom Diagnosis

S5JB0A1604001

Condition

Possible cause

Correction / Reference Item

Engine overheats
(Radiator fan operates)

Loose or broken water pump belt

Adjust or replace.

Not enough coolant

Check coolant level and add as necessary.

Faulty thermostat

Replace.

Faulty water pump

Replace.

Dirty or bent radiator fins

Clean or remedy.

Coolant leakage on cooling system

Repair.

Clogged radiator

Check and replace radiator as necessary.

Faulty radiator cap

Replace.

Improper ignition timing

Adjust.

Dragging brakes

Adjust brake.

Slipping clutch

Adjust or replace.

Poor charge battery

Check and replace as necessary.

Poor generation generator

Check and repair.

ECT sensor faulty

Check and replace as necessary.

Radiator cooling fan relay No.2 and/or
No.3 faulty

Check and replace as necessary.

Radiator fan motor faulty

Check and replace as necessary.

ECM faulty

Check and replace as necessary.

Wiring or grounding faulty

Repair as necessary.

Equipped with too much electric load
part(s)

Dismount.

Engine overheats
(Radiator fan does not
operate)

Fuse blown

Check 15 A fuse of relay/fuse box and check
for short circuit to ground.

Radiator cooling fan relay No.1 faulty

Check and replace as necessary.

ECT sensor faulty

Check and replace as necessary.

Radiator cooling fan motor faulty

Check and replace as necessary.

Wiring or grounding faulty

Repair as necessary.

ECM faulty

Check and replace as necessary.