Isuzu NHR 4J Series, Workshop Manual

Page: 392 / 406

ENGINE EXHAUST 6F – 5
INSTALLATION
4. Front exhaust pipe.
3. Front exhaust pipe fixing bolts and nuts.
• Tighten the fixing nuts to the specified torque
N ∙ m (kg ∙ m/lb ∙ ft)
50 (5.1/37)
2. Front exhaust pipe mounting bracket fixing bolt and nut.
• Tighten the fixing bolt to the specified torque
N ∙ m (kg ∙ m/lb ∙ ft)
40 (4.1/30)
1. Exhaust manifold fixing nuts
• Tighten the fixing nuts to the specified torque
N ∙ m (kg ∙ m/lb ∙ ft)
69 (7/51)
• Connect battery ground cable.
• After assembling each part, start the engine to check
for any leakage of gas at each connection.
Exhaust Brake Unit
INSPECTION
Operational inspection
• With the engine idling, operate the exhaust brake to
check for the sound of the valve hitting against the
stopper.
Unit inspection
• Check to see if the exhaust valve opens and closes
smoothly when the power chamber is
applied with a negative pressure (400 mmHg - 700
mmHg) by the vacuum pump.
• Check to see if the clearance between the valve and
the body is in the range of 0.1 mm - 0.2 mm (the
minimum of 0.1 mm) on an average of the points “A”
and “B” when the power chamber is applied with a
negative pressure (650 mmHg - 700 mmHg) by the
vacuum pump.
When the clearance is outside this range, adjust the
clearance with the adjust bolt.
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