S5 Workshop Manual
Engine
EM-29
2. Dismantling
1) Dismantle timing belt, oil pump housing, flywheel, cylinder head assembly and oil
pan.
2) Dismantle rear oil seal support and rear oil seal.
3) Dismantle connecting rod cap.
Notes:
■
Make marks on bearing cover so that it is facilitate re-installation according to
original position and direction.
4) Dismantle main bearing and crankshaft Place bearing in sequence according to
cover number.
3. Inspection
1) Crankshaft
Inspect whether crankshaft journal and connecting rod journal have damage,
nonuniform abrasion and crack. Meanwhile, inspect whether oil hole is blocked.
Repair or replace any defected part.
Inspect the roundness and cylindricity
of crankshaft journal.
Standard value
Outer diameter of crankshaft journal:
56.982
～
57.000 mm
Outer diameter of crankshaft pin:
44.980
～
45.000 mm
2). Main bearing and connecting rod bearing
Visually inspect whether each bearing has peeling off, melting, scratch or improper
contact surface. Replace any defected bearing.
Inspect bearing clearance through the measurement of outer diameter of crankshaft
journal and inner diameter of bearing. Obtain the clearance value through the
calculation of measured diameter difference.
Standard value clearance
Main bearing of crankshaft:
No.l,2,4,5: 0.018
～
0.036 mm
No.3: 0.024
～
0.042 mm
Connecting rod bearing:
0.015
～
0.048 mm
Limiting value:
EM041
EM040
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