Isuzu KB P190. Service 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.