Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Service manual — part 85
ME(STI)-102
Cylinder Block
MECHANICAL
4) Use a thickness gauge to measure the thrust
clearance of crankshaft at #5 crank journal bearing.
If clearance exceeds the standard, replace the
bearing.
Crankshaft thrust clearance:
Standard
0.030 — 0.115 mm (0.0012 — 0.0045 in)
5) Inspect individual crankshaft bearings for signs
of flaking, seizure, melting and wear.
6) Measure the oil clearance on each crankshaft
bearing using plastigauge. If the measured value is
out of standard, replace the defective bearing with
an undersize one, and replace or grind to correct
the crankshaft as necessary.
Crankshaft oil clearance:
Standard
0.010 — 0.030 mm (0.00039 — 0.0012 in)
ME-00322
ME(STI)-103
Intake and Exhaust Valve
MECHANICAL
21.Intake and Exhaust Valve
A: SPECIFICATION
Refer to “Cylinder Head” for removal and installa-
tion procedures of the intake and exhaust valves.
<Ref. to ME(STI)-70, REMOVAL, Cylinder Head.>
ME(STI)-104
Piston
MECHANICAL
22.Piston
A: SPECIFICATION
Refer to “Cylinder Block” for removal and installa-
tion procedures of pistons. <Ref. to ME(STI)-80,
ME(STI)-105
Connecting Rod
MECHANICAL
23.Connecting Rod
A: SPECIFICATION
Refer to “Cylinder Block” for removal and installa-
tion procedures of connecting rod. <Ref. to
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