Isuzu 4JA1 Workshop Manual page 138

6A – 116 ENGINE MECHANICAL
27. Cylinder Head Gasket
The cylinder head gasket "TOP" mark must be facing up.
NOTE:
Before the gasket installation, measure the piston
head projection and select the appropriate head
gasket.
Refer to "INSPECTION AND REPAIR", "Cylinder Head
Gasket Selection".
28. Cylinder Head
1. Align the cylinder body dowels and the cylinder head
2. Apply a coat of engine oil to the cylinder head bolt
3. Tighten the cylinder head bolts in three steps of anglar
Cylinder Head Bolt Torque
011LX073
30. Rocker Arm Shaft and Rocker Arm
Tighten the rocker arm shaft bracket bolts in the numerical
order shown in the illustration.
Rocker Arm Shaft Braket Bolt Torque
014LX083
31. Thermostat Housing
1. Install the thermostat housing.
2. Tighten the thermostat housing bolts to the specified
Thermostat Housing Bolt Torque
031R300002
dowel holes.
Carefully place the cylinder head on the cylinder head
gasket.
threads and setting faces.
tightening methed.
Follow the numerical sequence shown in the
illustration.
1st step
2nd step
3rd step
54 (5.5/40)
torque.
19 (1.9/14)
N·m(kg·m/lbft)
49 (5.0/36)
60° - 75°
60° - 75°
N·m(kg·m/lbft)
N·m(kg·m/lbft)