Isuzu KB P190. Manual - part 239

6B – 12  ENGINE COOLING 

 

  

 

031R300003

 

5. Thermostat 

Install the thermostat to the thermostat housing. 

6.  Water Outlet Pipe 

1)  Install the water outlet pipe with new gasket to the 

thermostat housing. 

2)  Tighten the outlet pipe bolt to specified torque. 

Outlet Pipe Bolt Torque 

N·m(kg·m/lb ft)

19(1.9/14) 

 

3)  Connect the turbocharger-cooling pipe to outlet pipe. 

 

 

 

7.  Radiator Upper Hose 

1)  Connect the radiator upper hose to the water outlet 

pipe. 

2)  The knob of clamp shall be dircted to holizonal side. 

3)  Replenish the engine coolant. 

 

 

 

 

ENGINE COOLING   6B – 13 

THERMOSTAT 

  

 REMOVAL AND INSTALLATION 

Read this Section carefully before performing any removal and installation procedure. This Section gives you 
important points as well as the order of operation. Be sure that you understand everything in this Section before you 
begin. 

 

 

 

Removal 

1.  Radiator Upper Hose 

1)  Partially drain the engine coolant. 

2)  Remove the radiator upper hose. 

 

 

 

 

 

2.  Water Outlet Pipe 

3)  Disconnect the turbocharger-cooling pipe from outlet 

pipe. 

4)  Loosen the fixing bolt and remove the water outlet 

bolt. 

3. Thermostat 

Remove the thermostat from the thermostat housing. 

Take care not to damage the thermostat. 

 

031R300003 

 

 

 

Inspection and Repair 

Make the necessary adjustments, repairs, and part 
replacements if excessive wear or damage is discovered 
during inspection. 

 

 

 

 

031RY00005 

Operating Test of Thermostat 

1.  Completely submerge the thermostat in water. 

2.  Heat the water. 

Stir the water constantly to avoid direct heat being 
applied to the thermostat. 

3.  Check the thermostat initial opening temperature. 

Thermostat Initial Opening Temperature 

°C (°F)

82 (180) 

 

4.  Check the thermostat full opening temperature. 

Thermostat Full Opening Temperature 

°C (°F)

95 (203) 

 

Valve Lift At Fully Open Position 

mm (in)

9.5 (0.37) 

 

6B – 14  ENGINE COOLING 

c

 Thermometer 

d

 Agitating rod 

e

 Wooden piece 

 

 

 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Installation 

1. Thermostat 

Install the thermostat to the thermostat housing. 

2.  Water Outlet Pipe 

3)  Install the water outlet pipe with new gasket to the 

thermostat housing. 

4)  Tighten the outlet pipe bolt to specified torque. 

Outlet Pipe Bolt Torque 

N·m(kg·m/lb ft)

19(1.9/14) 

 

5)  Connect the turbocharger-cooling pipe to outlet pipe. 

031R300003 

 

 

 

 

 

3.  Radiator Upper Hose 

1)  Connect the radiator upper hose to the water outlet 

pipe. 

2)  The knob of clamp shall be directed to holizonal side. 

3)  Replenish the engine coolant. 

 

 

 

ENGINE COOLING   6B – 15 

RADIATOR 

 

 REMOVAL AND INSTALLATION 

Radiator and Associated Parts 

 

  

 

 

RTW36BLF000101 

Legend 

 

1. Radiator Hose 

 

2. Drain Plug 

 

3. Fan Guide, Lower 

 

4. Fan Guide 

 

5. Bracket 

 

 

 

 

6. Reserve Tank Hose 

 

7. Reserve Tank 

 

8. Radiator Cap 

 

9. Radiator Assembly