Suzuki Grand Vitara JB416 / JB420 / JB419. Manual - part 181

1F-21 Engine Cooling System: For Diesel Engine Model

Installation

1) Install ECT sensor referring to “Engine Coolant 

Temperature (ECT) Sensor Removal and 
Installation: For Diesel Engine Model in Section 1C”, 
if removed.

2) Install thermostat assembly (1) to cylinder head with 

new gasket.

Tightening torque
Thermostat bolt (a):  8 N·m (0.8 kgf-m, 6.0 lb-ft)

3) Connect ECT sensor connector (3).
4) Connect water hoses (2) to thermostat assembly.

5) Install engine assembly referring to “Engine 

Assembly Removal and Installation: For F9Q Engine 
in Section 1D”.

Radiator Cooling Fan Motor On-Vehicle 
Inspection

S6JB0A1626009

1) Check main and/or sub fan operation of radiator 

cooling fans as follows.
a) Connect battery to main fan motor coupler 

(coupler color: black) or sub fan motor coupler 
(coupler color: gray) as shown in figure.

b) Check that radiator cooling fan rotates smoothly.

If any abnormality is found, replace fan motor.

Reference: Fan motor specified current at 12 
V
Main fan operation: 10.9 – 14.4 A
Sub fan operation: 10.9 – 14.4 A

2

1

3

2

(a)

I5JB0B160006-01

1. Main fan motor

3. Battery

2. Sub fan motor

4. Fan motor coupler

I5JB0A161012-02

I5JB0A161011-01

Engine Cooling System: For Diesel Engine Model 1F-22

Radiator Cooling Fan Relay Inspection

S6JB0A1626010

1) Disconnect negative (–) cable at battery.
2) Remove radiator cooling fan relay No.1 (1), No.3 (2) 

and/or No.2 (3) from relay box.

3) Check radiator cooling fan relay No.1 (1) and No.3 

(2) as follows.
a) Check that there is no continuity between 

terminals “C” and “D”. If there is continuity, 
replace relay.

b) Connect battery positive (+) terminal to terminal 

“B” of relay.

c) Connect battery negative (–) terminal to terminal 

“A” of relay.

d) Check continuity between terminals “C” and “D”. 

If there is no continuity, replace relay. 

4) Check radiator cooling fan relay No.2 (3) as follows.

a) Check that there is no continuity between 

terminals “G” and “H” and between terminals “G” 
and “F”. If there is continuity, replace relay.

b) Check continuity between terminals “I” and “H”. If 

there is continuity, replace relay.

c) Connect battery positive (+) terminal to terminal 

“F” of relay.

d) Connect battery negative (–) terminal to terminal 

“E” of relay.

e) Check continuity between terminals “G” and “H”. 

If there is continuity, replace relay.

[A]: For radiator cooling fan relay No.1 and No.3
[B]: For radiator cooling fan relay No.2

1

2

3

“D”

“B”

“A”

“C”

“A”

“B”

“D”

“C”

“H”

“F”

“E”

“G”

“I”

“F”

“E”

“H”

“I”

“G”

[A]

[B]

I5JB0B160007-01

1F-23 Engine Cooling System: For Diesel Engine Model

Radiator Cooling Fan Assembly Removal and 
Installation

S6JB0A1626011

Removal

1) Disconnect negative (–) cable at battery.
2) Disconnect connectors (1) of cooling fan motors.

3) With hose connected, detach P/S fluid reservoir with 

reservoir bracket.

4) Remove air cleaner case and air cleaner suction 

pipe (2).

5) Remove degassing tank (1) from radiator.

6) Remove cooling fan assembly.

CAUTION

!

 

Be sure not to damage condenser inlet pipe.

 

Installation
Reverse removal procedure for installation noting the 
following.
• Refill cooling system referring to “Cooling System 

Refilling: For Diesel Engine Model”.

• After installation, verify there is no coolant leakage at 

each connection.

Radiator On-Vehicle Inspection and Cleaning

S6JB0A1626012

Inspection
Check radiator for leakage or damage. Straighten bent 
fins, if any.

Cleaning
Clean frontal area of radiator cores.

Radiator Removal and Installation

S6JB0A1626013

Removal

1) Disconnect negative cable at battery.
2) Drain coolant referring to “Cooling System Draining: 

For Diesel Engine Model”.

3) Remove cooling fan assembly referring to “Radiator 

Cooling Fan Assembly Removal and Installation: For 
Diesel Engine Model”.

4) Remove radiator inlet and outlet hose from radiator.
5) Remove radiator from vehicle.

Installation
Reverse removal procedures, noting the following.
• Refill cooling system referring to “Cooling System 

Refilling: For Diesel Engine Model”.

• After installation, verify there is no coolant leakage 

each connection.

Water Pump Removal and Installation

S6JB0A1626020

Removal

1) Drain coolant referring to “Cooling System Draining: 

For Diesel Engine Model”.

2) Remove timing belt referring to “Timing Belt and Belt 

Tensioner Removal and Installation: For F9Q Engine 
in Section 1D”.

3) Remove water pump assembly (1).

1

I5JB0B160010-01

1

2

I5JB0B160012-01

I2RH01160014-01

Engine Cooling System: For Diesel Engine Model 1F-24

Installation

1) Remove oil and dust from sealing surface of cylinder 

block and water pump.

2) Apply sealant to three bolts (1).

“A”:  Thread lock cement  (Loctite 
FRENETANCH®)

3) Install water pump assembly (2) with new gasket.

Tightening torque
Water pump assembly bolt (a):  10 N·m (1.0 kgf-
m, 7.5 lb-ft)

4) Install timing belt referring to “Timing Belt and Belt 

Tensioner Removal and Installation: For F9Q Engine 
in Section 1D”.

5) Refill coolant referring to “Cooling System Refilling: 

For Diesel Engine Model”.

Water Pump Inspection

S6JB0A1626017

CAUTION

!

 

Do not disassemble water pump.
If any repair is required on pump, replace it 
as assembly.

 

Rotate water pump by hand to check for smooth 
operation. If pump does not rotate smoothly or makes 
abnormal noise, replace it.

Specifications

Tightening Torque Specifications

S6JB0A1627001

Reference:
For the tightening torque of fastener not specified in this section, refer to “Fastener Information in Section 0A”.

Special Tools and Equipment

Recommended Service Material

S6JB0A1628001

I5JB0B160008-01

I5JB0B160009-01

I5JB0B160011-01

Fastening part

Tightening torque

Note

N

⋅m

kgf-m

lb-ft

Thermostat bolt

8

0.8 

6.0

)

Water pump assembly bolt

10

1.0 

7.5

)

Material

SUZUKI recommended product or Specification

Note

Thread lock cement

Loctite FRENETANCH®

—

)