Hyundai Sonata 1991 Shop Manual page 94

CRANKSHAFT
Plastigauge Method
Plastigauge may be used to measure the clearance.
1. Remove oil and grease and any other dirt from bearings and
journals.
2. Cut plastigauge to the same length as the width of the bear-
ing and place it in parallel with the journal, off oil holes.
3. Install the crankshaft, bearings and caps and tighten them
to the specified torques. During this operation, do not turn
the crankshaft. Remove the caps. Measure the width of the
plastigauge at the widest part by using a scale printed on
the gauge package.
If the clearance exceeds the repair limit, the bearing should
be replaced or an undersize bearing should be used.
When installing anew crankshaft, be sure to use standard
size bearings.
20Y141
Should the standard clearance not be obtained even after
bearing replacement, the journal and pin should be ground
to undersize and a bearing of the same size should be
installed.
Oil Seal
Check front and rear oil seals for damage or worn lips. Replace
any seat that is defective.
Drive Plate
Main Bearing
1. Install grooved main bearing (upper bearing) on cylinder
block side.
2. Install grooveless main bearing (lower bearing) on main bear-
ing cap side.
3. Both upper and lower bearings for center are grooveless.
20Y142
~
Upper bearing
(for No. 1,2,4,5,)
Upper and lower bearings (for center)
({;""
Lower bearing
(for No.1 ,2,4,5)
Y20NCOA
Replace deformed, damaged, or cracked drive plates.
INSTALLATION
4. Install crankshaft. Apply engine oil to journal and pin.
5. Caps should be installed with arrow mark directed toward
front of engine. Cap number must be correct.
6. Tighten cap bolts to specified torque in sequence of center
No.2, No.4, front and rear caps.
Tightening torque
Main bearing cap bolts .
49-54 Nm (500-550 kg.cm, 36-40 Ib.ft)
20-63