Engine Trouble In General - Subaru IMPREZA 2002 Service Manual

ENGINE TROUBLE IN GENERAL
MECHANICAL
8
Starter
22.Engine Trouble in General
Defective battery-to-starter harness B
Defective starter switch C
Defective inhibitor switch or neutral switch C
A: INSPECTION
NOTE:
"RANK' shown in the chart refers to the possibility of reason for the trouble in order ("Very often" to "Rarely")
A - Very often
B
-
Sometimes
C
-
Rarely
Defective charging system
Seizure of crankshaft and connecting rod bearing
Seized camshaft
TROUBLE
B
C
C
1. Engine will not start.
Belt
1) Starter does not turn.
Lack of or insufficient fuel B
Defective B
Defective timina B
2) Initial combustion does
not occur.
Improper valve seating
Defective valve stem
Worn or broken valve sprina
PROBLEM PARTS, ETC.
I
POSSIBLE CAUSE
I
RANK
I
C
C
B
I
Defective starter l B 1
I
Poor terminal connection
/ A I
Battery
I
Run-down battery
I A I
b
Friction
1
Seized or stuck piston and cvlinder
I c l
b
Starter
I
Defective starter I C
Engine control system <Ref. to EN(S0HC)-2, Basic Diagnostic Procedure.>
] A
1
Fuel line
I
Defective fuel pump and relay
] A I
b
Compression
I
Incorrect valve clearance
I C 1
I
Loosened spark plugs or defective gasket
I C 1
I
Loosened cylinder head bolts or defective gasket
1
C
I
I
Worn or stuck piston rings, cvlinder and piston
I C 1
I
Incorrect valve timing
1 B 1
1
Improper engine oil (low viscosity)
I B I
M E(S0HC)-89