Mitsubishi 4G1 Service Manual page 280

11 D-48
INSPECTION
CRANKSHAFT OIL CLEARANCE (PLASTIC GAUGE
METHOD)
(1) Remove oil from the crankshaft journal and the crankshaft
bearing.
(2) Install the crankshaft.
(3) Cut the plastic gauge to the same length as the width of
bearing and place it on the journal in parallel with its axis.
(4) Install the crankshaft bearing cap carefully and tighten the
bolts to the specified torque.
(5) Carefully remove the crankshaft bearing cap.
(6) Measure the width of the plastic gauge at its widest part by
using a scale printed on the plastic gauge package.
Standard value: 0.02 - 0.04 mm (0008 - .0016 in.)
Limit: 0.1 mm (.004 in.)
CYLINDER BLOCK
surface for warpage. Make sure that the surface is free
from gasket chips and other foreign matter.
Standard value: 0.05 mm (.0020 in.) or less
Limit: 0.1 mm (.0040 in.)
(2) If the distortion is excessive, correct within the allowable
limit or replace.
Grinding limit: 0.2 mm (.008 in.)
The total thickness of the stock allowed to be
removed from cylinder block and mating cylinder
head is 0.2 mm (.008 in.) at maximum.
Cylinder block height (when new): 243.5 mm (9.587 in.)
(3) Check the cylinder walls for scratches and seizure. If
defects are evident, correct (bored to oversize) or replace.
(4) Using a cylinder gauge, measure the cylinder bore and
cylindricity. If worn badly, correct the cylinder to an oversize
and replace the piston and piston rings. Measure at the
points shown in illustration.
Standard value:
Cylinder I.D.: 81.00 - 81.03 mm (3.1890 - 3.1902 in.)
Out-of-roundness and taper of cylinder bore:
0.01 mm (0004 in.) or less
TSB Revision