Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. 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.>

<Ref. to ME(STI)-70, INSTALLATION, 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,

REMOVAL, Cylinder Block.> <Ref. to ME(STI)-84,

INSTALLATION, Cylinder Block.>

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

ME(STI)-80, REMOVAL, Cylinder Block.> <Ref. to

ME(STI)-84, INSTALLATION, Cylinder Block.>