Inspection And Repair - Isuzu Trooper 1999 Workshop Manual

NOTE: Do not apply engine oil to the crank case side
bolts.
Main bearing cap bolts.
Torque: 39 N·m (29lb ft)
Oil gallery fixing bolts.
Torque:
1st step: 29 N·m (21 lb ft)
2nd step 55°∼ 65°
Crank case side bolts
Torque : 39 N·m (29lb ft)
NOTE: Do not allow the crankshaft to rotate.
10. Remove the main bearing caps in the sequence
shown in the illustration.
11. Measure the plastigage width and determine the oil
clearance. If the oil clearance exceeds the specified
limit, replace the main bearings as a set and/or
replace the crankshaft.
Standard : 0.019 mm–0.043 mm
(0.0007 in–0.0017 in)
Limit : 0.08 mm (0.0031 in)
12. Clean the plastigage from the bearings and the
crankshaft.
Remove the crankshaft and the bearings.
Crankshaft (12) Inspection
Inspect the surface of the crankshaft journal and crank
pins for excessive wear and damage. Inspect the oil seal
fitting surfaces for excessive wear and damage. Inspect
the oil ports for obstructions.
015RS006

Inspection and Repair

1. Carefully set the crankshaft on the V–blocks. Slowly
rotate the crankshaft and measure the runout. If the
crankshaft runout exceeds the specified limit, the
crankshaft must be replaced.
Runout : 0.04 mm (0.0016 in)
015RS004
ENGINE MECHANICAL 6A–71
015RS008
015RS007