CRANKSHAFT AND CYLINDER BLOCK
ENGINE OVERHAUL
11B-62
CAUTION
• When the tightening angle is smaller than the
specified tightening angle, the appropriate
tightening capacity cannot be secured.
• When the tightening angle is larger than the
specified tightening angle, remove the bolt to
start from the beginning again according to
the procedure.
5. Use special tool Angle gauge (MB991614) to
tighten bolts 45
° according to the tightening order.
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6. Check axial play of the crankshaft after installing
the crankshaft bearing cap. If the axial play
exceeds the limit, replace the thrust bearing.
Standard value: 0.05 − 0.25 mm
Limit: 0.4 mm
INSPECTION
M1113008802823
CRANKSHAFT OIL CLEARANCE
(PLASTIGAGE METHOD)
Oil clearance can be easily measured by using a
"Plastigage."
When using a "Plastigage," perform measurement in
the following procedure.
1. Fully wipe oil off the outside diameter of the
crankshaft and inside diameter of the bearing.
2. Assemble the crankshaft.
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3. Place a Plastigage in length equal to the bearing
width on the journal shaft straight in alignment
with the shaft centre.
4. Carefully install the bearing cap and tighten the
bolt according to the main point of installation
>>B<<.
5. Remove the bolt, and then carefully remove the
crankshaft bearing cap.
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6. Measure the crushed Plastigage width (area most
widely crushed) using a scale printed on the
Plastigage bag.
Standard value: 0.012 − 0.030 mm
Limit: 0.1 mm
CYLINDER BLOCK
1. Visually check the cylinder block for scratch, rust
and corrosion. Use a flaw detecting agent to
check for cracks. If it is found faulty, repair or
replace it.
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2. Measure distortion on the top surface of the
cylinder block using a straight edge and thickness
gauge.
If distortion exceeds the limit, grind and repair it.
A gasket or the like must not be adhered to the
top surface of the cylinder block during
measurement.
Distortion on bottom
Standard value: Within 0.05 mm
Limit: 0.2 mm
Grinding limit: 0.2 mm
3. Check the cylinder wall for scratch or seizure. If
there is any defect, replace the cylinder block.
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