Isuzu KB P190. Manual - part 520

6A-66 ENGINE MECHANICAL (C24SE) 

 

Installation 

Follow the removal procedure in the reverse order to install the 
radiator. 
 

 

 

 

 

Thermostat 

Removal 

  1.  Remove water outlet nozzles with thermostat from 

thermostat housing. 

  2.  Remove coolant hose and collect coolant. 

 

 

 
 

 

 

 

Important! 

Remove and Install thermostat only together with water outlet 

nozzles. 

 

Tighten (Torque) 

Water outlet nozzles to thermostat housing - 8 N

⋅m (0.8 kgf⋅m)

 

Installation 

  1.  Install coolant hose. 

  2.  Fill cooling system and bleed according to the 

corresponding operation. 

 

 

 

 

 
 
 
 
 
 
 
 

Water Pump 

Removal 

  1.  Remove lower hose band from pipe band and collect 

coolant. 

  2.  Remove front toothed belt cover according to the 

corresponding operation. 

  3.  Remove water pump from cylinder block after releasing 

tension on toothed belt. 

 

Clean 

Sealing surfaces 

 

ENGINE MECHANICAL (C24SE) 6A-67 

 

 

Coating sealing surfaces with Silicone Grease 

Installation 

  1.  Install water pump to cylinder block with new rubber O-

ring. 

  2.  Apply tension to toothed belt according to the 

corresponding operation. 

  3.  Install coolant hoses. 

  4.  Fill cooling system and bleed according to the  

corresponding operation. 

 

 

 

 

 

 
 
 
 
 
 

Alternator 

Removal 

  1.  Remove ground cable from battery. 

  2.  Remove cable connection from alternator and V-belt. 

  3.  Remove alternator from retaining strap and lower 

fastening. 

 

Installation 

  1.  Install alternator by tightening firmly by hand. 

  2.  Install V-belt and apply tension according to the 

corresponding operation. 

  3.  Install cable connections to alternator. 

  4.  Install ground cable to battery. 

 

 

 

 

 

Starter 

Removeal 

  1.  Remove cable connections from starter. 

  2.  Remove upper bolt of transmission side. 

  3.  Remove lower bolt of engine side. 

 

 

Tighten (Torque) 

Starter to cylinder block: 
Engine side - 51 N

⋅m (5.2 kgf⋅m) 

Transmission side - 75 N

⋅m (7.6 kgf⋅m) 

 
Starter support to cylinder block - 25 N

⋅m (2.5 kgf⋅m) 

 
Re-connect cables. 

6A-68 ENGINE MECHANICAL (C24SE) 

V-belt Tension of Alternator 

 

 

 

 

RTW66ASH000101 

Measure 

Measure V-belt tension of alternator. 
Permitted values for new V-belt are approx. 311-489N (31-50 
kgf).  
Note: 
V-belt to deflection as loaded with 10kg : 8-12mm. 
 

 

 
 
 

Adjust 

Adjust V-belt tension by loosening clamping bracket and lower 
alternator bracket and moving alternator. 
 

Tighten (Torque) 

Clamping bracket to alternator - 35 N

⋅m (3.6 kgf⋅m) 

Lower alternator bracket - 25 N

⋅m (2.6 kgf⋅m) 

 

 

 

V-Belt Tension of Power Steering Pump 

Measure 

Measure V-belt tension of power steering pump. Permitted 
values for new belt are approx. 578-712N (59-73 kgf) and 534-
667N (54-68 kgf) for used belt. 
Note: 
V-belt to deflection as loaded with 10kg : 8-12mm. 
 

 

 
 
 

Adjust 

Adjust V-belt tension by loosening clamping bolt, lower pump 
bracket, and adjusting nuts and moving steering pump. 
 

Tighten (Torque) 

Adjusting nuts - 18 N

⋅m (1.8 kgf⋅m) 

Clamping bolt - 25 N

⋅m (2.6 kgf⋅m) 

Lower pump bracket - 26 N

⋅m (2.6 kgf⋅m) 

 

 

 

V-Belt Tension of Air Conditioning Compressor

Measure 

Measure V-belt tension of air conditioning compressor. 
Permitted values for new V-belt are approx. 422N (43 kgf). 
Note: 
V-belt to deflection as loaded with 10kg : 8-12mm. 

ENGINE MECHANICAL (C24SE) 6A-69 

 

 

 

RTW66ASH000201 

 

 

Adjust 

Adjust the A/C compressor V-belt (1) for adjustment of belt. 

1.   Loosen the tension pulley lock nut (2) and tension pulley 

adjusting bolt (3) of the tension pulley of the A/C 
compressor V-belt (1) and bring the belt to free state. 

2.   Rotate the adjusting bolt (3) of A/C compressor adjust 

the belt (remove and fit). 

• When replacing the belt, you must always replace both 

the belts. 

3.   After adjustments, tighten the lock nut (2) using the 

specified torque. 

Tightening torque: 40 N

⋅m (4.1 kgf⋅m) 

• Finally, adjust the tension of A/C compressor V-belt.