Isuzu KB P190. Manual - part 351

6A-44  ENGINE MECHANICAL (4JK1/4JJ1) 

3.  Place a vernier caliper on the end of the control

rod of actuator. Release the vacuum pressure and

check the control rod moves. Measure the length

of the control rod moving. 

 

  Standard length 

mm (in)

12 (0.48) 

 

Installation 

1. Install the gasket and the turbocharger to the

exhaust manifold. Temporarily tighten nuts. 

2.  Install the oil feed and return pipe and temporarily

tighten. 

3. Tighten the turbocharger nuts to the specified

torque. 

Tightening torque: 27 N

⋅⋅⋅⋅m (2.8 kg⋅⋅⋅⋅m / 20 lb ft) 

4.  Tighten the oil feed and return pipe bolts and nuts 

to the specified torque. 

Tightening torque (Turbocharger side):  

 

10 N

⋅⋅⋅⋅m (1.0 kg⋅⋅⋅⋅m / 87 lb in) 

Tightening torque (Crank case side):  

 

25 N

⋅⋅⋅⋅m (2.5 kg⋅⋅⋅⋅m / 18 lb ft) 

5. Install the water feed and return pipe to the

turbocharger.  

Tightening torque: 25 N

⋅⋅⋅⋅m (2.5 kg⋅⋅⋅⋅m / 18 lb ft) 

6.  Install the heat protector to the turbocharger. 

Tightening torque: 10 N

⋅⋅⋅⋅m (1.0 kg⋅⋅⋅⋅m / 18 lb ft) 

7.  Install the turbocharger bracket. 

8.  Install the catalyst converter. 

 

Tighten the nuts to the specified torque. 

Tightening torque: 27 N

⋅⋅⋅⋅m (2.8 kg⋅⋅⋅⋅m / 20 lb ft) 

9.  Install the mud cover of front RH fender skirt (4

×4 

only). 

10. Install the front exhaust pipe.  

 

 Tighten the nuts to the specified torque. 

Tightening torque 

Exhaust Manifold Side: 67 N

⋅⋅⋅⋅m (6.8 kg⋅⋅⋅⋅m / 49 lb ft)

Exhaust Pipe Side: 43 N

⋅⋅⋅⋅m (4.4 kg⋅⋅⋅⋅m / 32lb ft) 

11. Install the intercooler. 

•  Install the intercooler. 
•  Install the two intake hoses. 
•  Connect the BARO sensor harness connector.

 

12. 

Install the intake duct between the turbocharger 

and the air cleaner. 

Tightening torque: 6 N

⋅⋅⋅⋅m (0.6 kg⋅⋅⋅⋅m / 52 lb in) 

13.Replenish the coolant.  

 

ENGINE MECHANICAL (4JK1/4JJ1)  6A-45 

Torque Specifications 

 

 

 

 

RTW76ALF000501 

 

6A-46  ENGINE MECHANICAL (4JK1/4JJ1) 

Exhaust Manifold (High Output) 

Components 

  

 

 

 

RTW76FMF000101 

Legend 

 1. EGR 

Cooler 

  2.  EGR Cooler Gasket 

  3.  EGR Cooler Gasket 

  

5. 

Heat 

Protector 

 6. Exhaust 

Manifold 

 

 

 

ENGINE MECHANICAL (4JK1/4JJ1)  6A-47 

Removal 

1.  Drain the engine coolant. 

2.  Remove the turbocharger. 

•  Refer to “Turbocharger”. 

3.  Remove the EGR cooler heat protector. 

4.  Disconnect the water hoses from the EGR cooler

water pipes. 

5.  Remove the EGR cooler. 

6.  Remove the exhaust manifold. 

 

 
 

 

 

 

 

RTW76ASH002101

Inspection 

•  Inspection of the exhaust manifold. Inspect the

plane surface of the plane on which the

manifold and the cylinder head are to be

installed. 

 
  Manifold installation plane surface 

mm (in)

Standard 

0.3 (0.01) or lower 

Limit 0.5 

(0.02) 

 

Caution: 

If the plane surface exceeds the limit, replace it. 

 

 
 

 

LNW21BSH022301

•  Check a crack in the exhaust manifold visually. 

Carefully inspect the turbocharger for abrasion and/or 
excessive wear. Make any necessary adjustments,
repairs, and/or part replacements. 

Installation 

1.  Put the gasket in to install the exhaust manifold. 

•  Tighten up with the 8 nuts according to the 

order given in the illustration. 

Tightening torque: 52 N

⋅⋅⋅⋅m (5.3 kg⋅⋅⋅⋅m / 38 lb ft) 

Caution: 
Do not tighten up too much because it hampers
expansion and contraction due to the heat from the 
manifold. 

 

 
 
 
 
 
 

 

 

RTW76ASH002201