Subaru Legacy IV (2008 year). Service manual — part 489
ME(H6DO)-82
Piston
MECHANICAL
25.Piston
A: SPECIFICATION
Refer to “Cylinder Block” for removal and installa-
tion procedures of pistons. <Ref. to ME(H6DO)-64,
REMOVAL, Cylinder Block.> <Ref. to ME(H6DO)-
66, INSTALLATION, Cylinder Block.>
ME(H6DO)-83
Connecting Rod
MECHANICAL
26.Connecting Rod
A: SPECIFICATION
Refer to “Cylinder Block” for removal and installa-
tion procedures of connecting rods. <Ref. to
ME(H6DO)-64, REMOVAL, Cylinder Block.> <Ref.
to ME(H6DO)-66, INSTALLATION, Cylinder
Block.>
ME(H6DO)-84
Crankshaft
MECHANICAL
27.Crankshaft
A: SPECIFICATION
Refer to “Cylinder Block” for removal and installa-
tion procedures of the crankshaft. <Ref. to
ME(H6DO)-64, REMOVAL, Cylinder Block.> <Ref.
to ME(H6DO)-66, INSTALLATION, Cylinder
Block.>
ME(H6DO)-85
Engine Trouble in General
MECHANICAL
28.Engine Trouble in General
A: INSPECTION
NOTE:
The “RANK” shown in the chart shows the possibilities of the cause of trouble in order from “Very often” to
“Rarely”.
A — Very often
B — Sometimes
C — Rarely
Symptoms
Problem parts etc.
Possible cause
RANK
1. Engine does not start.
1) Starter does not turn.
Starter
Defective battery-to-starter harness
B
Defective starter switch
C
Defective inhibitor switch
C
Defective starter
B
Battery
Improper connection of the terminal
A
Run-down battery
A
Defective charging system
B
Friction
Seizure of crankshaft and connecting rod bearing
C
Seized camshaft
C
Seized or stuck piston and cylinder
C
2) Initial combustion does
not occur.
Starter
Defective starter
C
Engine control system <Ref. to EN(H6DO)(diag)-2, Basic Diagnostic Procedure.>
A
Fuel line
Defective fuel pump and relay
A
Clogged fuel line
C
Lack of or insufficient fuel
B
Timing chain
Trouble
B
Defective timing
B
Compression
Incorrect valve clearance
C
Loosened spark plug or defective gasket
C
Loosened cylinder head bolt or defective gasket
C
Improper valve sealing
C
Defective valve stem
C
Worn or broken valve spring
B
Worn or stuck piston rings, cylinder and piston
C
Incorrect valve timing
B
Improper engine oil (low viscosity)
B
Trouble of valve lifter
C
Trouble of valve lifter. In case noise occurs with valve
moving, or when the harness involved to the oil switch-
ing solenoid valve, variable valve lift diagnosis oil pres-
sure switch and variable valve lift has trouble in a past.
B
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