Isuzu KB P190. Service manual - part 533

6C-14  ENGINE FUEL (C24SE) 

Removal 

CAUTION:  When repair to the fuel system has been
completed, start engine and check the fuel system
for loose connection or leakage. For the fuel system 
diagnosis, see Section “Driveability and Emission".

1.  Disconnect battery ground cable. 

2.  Loosen slowly the fuel filler cap. 

NOTE: To prevent spouting out fuel to change the
pressure in the fuel tank. 

NOTE: Cover opening of the filler neck to prevent any 
dust entering. 

3.  Jack up the vehicle. 

4.  Support underneath of the fuel tank with a lifter. 

5.  Remove the inner liner of the wheel house on rear

left side. 

6. Remove fasten bolt to the filler neck from the

body. 

7.  Disconnect the quick connector (8) into the fuel

tube from the fuel pipe and the evapo tube from

evapo joint connector. 

NOTE: Cover the quick connector to prevent any dust
entering and fuel leaking. 

NOTE: Refer to “Fuel Tube/Quick Connector Fittings” in
this section when performing any repairs. 

8.  Remove fasten bolt (1) to the tank band and the

tank band (2). 

9.  Disconnect the pump and sender connector on the

fuel pump and remove the harness from weld clip

on the fuel tank. 

10.  Lower the fuel tank (6). 

NOTE: When the fuel tank is lowered from the vehicle,
don’t scratch each hose and tube by around other pars.

 

 

Installation 

1.  Rise the fuel tank into position. 

NOTE: Ensure hoses and tubes do not foul on other
component. 

2.  Connect the pump and sender connector to the 

fuel pump and install harness to into the plastic clip

welded to the top of the fuel tank.. 

NOTE: The connector must be certainly connected
against stopper. 

Ensure tank band anchor mates with guide hole on
frame. 

3.  Install the tank band to fasten bolt. 

Torque: 68 N

⋅⋅⋅⋅m (6.9kg⋅⋅⋅⋅m/50 lb ft) 

NOTE: The anchor of the tank band must be certainly
installed to guide hole on frame. 

4.  Connect the quick connector from the fuel tube to 

the fuel pipe and the evapo tube from evapo joint 

connector. 

NOTE: Pull off the left checker into the fuel pipe. 

NOTE: Refer to “Fuel Tube/Quick Connector Fittings” in
this section when performing any repairs. 

5.  Install the filler neck to the body by bolt. 

6.  Install the inner liner of the wheel house on rear 

side. 

7. Remove lifter to support underneath of the fuel 

tank. 

8.  Put back the vehicle. 

9.  Tigten the filler cap until at least three clicks are 

heard. 

10.  Connect the battery ground cable. 

 

 

ENGINE FUEL (C24SE)  6C-15 

Filler Neck 

Removal 

1.  Remove the fuel tank. 

NOTE: Refer to "Fuel Tank" in this section. 

2.  Put a marking the following point as the filler neck

assembly is restored. 
•  Each joint area of the hose (to restore axial

direction and insertion length of the hose) 

•  Each fasten area of the clamp (to restore axial

direction and position of the clamp) 

•  Each bolt in the clamp (to restore fasten length

of bolt in the clamp) 

•  The band clip (to restore position and fasten

length of the band clip) 

NOTE: Cover end of each hose and pipe to prevent any
dust entering. 

 

Installation 

1.  Align each marking and restore the following point.

•  Each joint area of the hose (Restore axial 

direction and insertion length of the hose) 

•  Each fasten area of the clamp (Restore axial 

direction and position of the clamp) 

•  Each bolt in the clamp (Restore fasten length of 

bolt in the clamp) 

Torque: 2.5 N･

･･

･m (0.25 kg････m / 2 lb ft) … filler neck 

side except flat deck model. 

•  The band clip (Restore position and fasten 

length of the band clip) 

2.  Install the fuel tank. 

NOTE: Refer to "Fuel Tank" in this section. 

 

 

Fuel Gauge Unit 

Removal and Installation 

As for removal and installation of the Fuel Gauge Unit,
refer to “Fuel Tank" of this section 6C as the fuel gauge
unit is combined with the fuel pump and sender
assembly. 

 

 

 

6C-16  ENGINE FUEL (C24SE) 

Fuel Filler Cap 

General Description 

A vacuum valve and pressure valve are built into the 
fuel filler cap which adjusts the fuel pressure in the fuel
tank to prevent fuel tank damage. 

 

 
 
 

 

 

RTW46CSH000301

Legend 

  (1) Seal Ring 

 

Inspection 

The fuel filler cap must be inspected for seal condition.

The fuel filler cap must be replaced if found defective 

CAUTION: A replacement fuel filler cap must be the
same as the original. The fuel filler cap valve was
designed primarily for this application and must be
replaced with the same type or decreased engine
performance may occur. 

 

 

 

 
 

ENGINE FUEL (C24SE)  6C-17 

Main Data and Specifications 

Torque Specification 

N

⋅⋅⋅⋅m (kg⋅⋅⋅⋅m/ lb ft) 

 

 

 

 

RTW46CLF000601