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1.Using a straightedge and
free gauge, check the block top surface for warpage. Make
sure that the surface is free from gasket chips and other
objects. Standard value: 0.05 mm Limit: 0.1
mm 2.If the distortion is excessive,
replace the cylinder block.
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3.Check cylinder walls for
scratches and seizure. If defects are evident, correct
(bored
to oversize) or replace. 4.Using cylinder gauge,
measure the cylinder bore, and cylindricity. If worn badly,
correct cylinder to an oversize and replace piston and
piston rings. Measurement points are shown
in illustration. Standard
value
Cylinder I.D.: 87.6
mm Cylindricity: 0.015 mm
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The crankshaft oil clearance can be
measured easily by using a plastigage, as follows:
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1.Remove oil and grease and
any other foreign matters from crankshaft journal and
bearing
inner surface.
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2.Install the
crankshaft.
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3.Cut the plastigage to the
same length as the width of bearing and place it on journal
in parallel with its axis.
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4.Gently place the
crankshaft bearing cap over it and tighten the bolts to the
specified
torque. 5.Remove the bolts and gently remove the
crankshaft bearing cap. 6.Measure the width of the
smashed plastigage at its widest section by using a scale
printed on the plastigage bag. Standard
value:
Number 1 and 4 journal 0.018
-
0.038 mm Number 2 and 3 journal 0.024 -
0.044 mm
Limit: 0.1 mm
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