2009 SUBARU TRIBECA Service Workshop Manual

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Page 1945 of 2453

SUBARU TRIBECA 2009 1.G Service Workshop Manual ME(H6DO)-79
Intake and Exhaust Valve
MECHANICAL
24.Intake and Exhaust Valve
A: SPECIFICATION
Refer to “Cylinder Head” for removal and installa-
tion procedures of intake and exhaust valves

Page 1946 of 2453

SUBARU TRIBECA 2009 1.G Service Workshop Manual ME(H6DO)-80
Piston
MECHANICAL
25.Piston
A: SPECIFICATION
Refer to “Cylinder Block” for removal and installa-
tion procedures of pistons. <Ref. to ME(H6DO)-62,
REMOVAL, Cylinder Block.> <R

Page 1947 of 2453

SUBARU TRIBECA 2009 1.G Service Workshop Manual ME(H6DO)-81
Connecting Rod
MECHANICAL
26.Connecting Rod
A: SPECIFICATION
Refer to “Cylinder Block” for removal and installa-
tion procedures of connecting rod.
<Ref. to ME(H6DO)-62, REMO

Page 1948 of 2453

SUBARU TRIBECA 2009 1.G Service Workshop Manual ME(H6DO)-82
Crankshaft
MECHANICAL
27.Crankshaft
A: SPECIFICATION
Refer to “Cylinder Block” for removal and installa-
tion procedures of crankshaft. <Ref. to ME(H6DO)-
62, REMOVAL, Cylinde

Page 1949 of 2453

SUBARU TRIBECA 2009 1.G Service Workshop Manual ME(H6DO)-83
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 “mos

Page 1950 of 2453

SUBARU TRIBECA 2009 1.G Service Workshop Manual ME(H6DO)-84
Engine Trouble in General
MECHANICAL
3) Initial combustion occurs. Engine control system <Ref. to EN(H6DO)(diag)-2, Basic Diagnostic Procedure.> A
Intake system Defective intake manifold g

ME(H6DO)-84
Engine Trouble in General
MECHANICAL
3) Initial combustion occurs. Engine control system A
Intake system Defective intake manifold gasket B
Defective throttle body gasket B
Fuel line Defective fuel pump and relay C
Clogged fuel line C
Lack of or insufficient fuel B
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
Wor n or broken valve spr ing B
Wor n or stuck piston r ings, cylinder and piston C
Incorrect valve timing B
Improper engine oil (low viscosity) B
Tr o u b l e o f t a p p e t C
Tr o u b l e o f t a p p e t . I n c a s e n o i s e o c c u r s w i t h v a l v e m o v -
ing. Or the harness involved to oil switching solenoid
valve, variable valve lift diagnosis oil pressure switch
and variable valve lift has trouble in a past.
B
4) Engine stalls after initial
combustion.
Engine control system A
Intake system Loosened or cracked intake duct B
Loosened or cracked PCV hose C
Loosened or cracked vacuum hose C
Defective intake manifold gasket B
Defective throttle body gasket B
Dirty air cleaner element C
Fuel line Clogged fuel line C
Lack of or insufficient fuel B
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
Wor n or broken valve spr ing B
Wor n or stuck piston r ings, cylinder and piston C
Incorrect valve timing B
Improper engine oil (low viscosity) B
Tr o u b l e o f t a p p e t C
Tr o u b l e o f t a p p e t . I n c a s e n o i s e o c c u r s w i t h v a l v e m o v -
ing. Or the harness involved to oil switching solenoid
valve, variable valve lift diagnosis oil pressure switch
and variable valve lift has trouble in a past.
B
Symptom Problem parts etc. Possible cause RANK

Page 1951 of 2453

SUBARU TRIBECA 2009 1.G Service Workshop Manual ME(H6DO)-85
Engine Trouble in General
MECHANICAL
2. Rough idle and engine
stall
Engine control system <Ref. to EN(H6DO)(diag)-2, Basic Diagnostic Procedure.> A
Intake system Loosened or cracked intak

Page 1952 of 2453

SUBARU TRIBECA 2009 1.G Service Workshop Manual ME(H6DO)-86
Engine Trouble in General
MECHANICAL
3. Low output, hesitation and
poor acceleration
Engine control system <Ref. to EN(H6DO)(diag)-2, Basic Diagnostic Procedure.> A
Intake system Loosened

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