2004 SUBARU FORESTER Service Repair Manual

Page 1065 of 2870

SUBARU FORESTER 2004  Service Repair Manual IGNITION
IG(H4SO)
Page
1. General Description ....................................................................................2
2. Spark Plug.......................................................

Page 1066 of 2870

SUBARU FORESTER 2004  Service Repair Manual IG(H4SO)-2
IGNITION
General Description
1. General Description
A: SPECIFICATION
Item Designation
Ignition coil/igni-
tor assemblyModel FH0137
Manufacturer DIAMOND
Primary coil resistance 0.73 Ω±10%

Page 1067 of 2870

SUBARU FORESTER 2004  Service Repair Manual IG(H4SO)-3
IGNITION
General Description
B: COMPONENT
(1) Spark plug (4) Spark plug cord (#2, #4)Tightening torque: N⋅m (kgf-m, ft-lb)
(2) Spark plug cord (#1, #3)T1: 21 (2.1, 15.2)
(3) Ignition coil

Page 1068 of 2870

SUBARU FORESTER 2004  Service Repair Manual IG(H4SO)-4
IGNITION
General Description
C: CAUTION
 Wear working clothing, including a cap, protec-
tive goggles, and protective shoes during opera-
tion.
 Remove contamination including dirt and co

Page 1069 of 2870

SUBARU FORESTER 2004  Service Repair Manual IG(H4SO)-5
IGNITION
Spark Plug
2. Spark Plug
A: REMOVAL
CAUTION:
All spark plugs installed on an engine, must be 
of the same heat range.
1. RH SIDE
1) Disconnect the ground cable from battery.
2) Rem

Page 1070 of 2870

SUBARU FORESTER 2004  Service Repair Manual IG(H4SO)-6
IGNITION
Spark Plug
6) Remove the spark plugs with spark plug sock-
ets.
B: INSTALLATION
1. RH SIDE
Install in the reverse order of removal.
Tightening torque (Spark plug):
21 N
⋅m (2.1 k

Page 1071 of 2870

SUBARU FORESTER 2004  Service Repair Manual IG(H4SO)-7
IGNITION
Spark Plug
3) Oil fouled:
Wet black deposits show excessive oil entrance
into combustion chamber through worn rings and
pistons or excessive clearance between valve
guides and stem

Page 1072 of 2870

SUBARU FORESTER 2004  Service Repair Manual IG(H4SO)-8
IGNITION
Ignition Coil & Ignitor Assembly
3. Ignition Coil & Ignitor Assem-
bly
A: REMOVAL
1) Disconnect the ground cable from battery.
2) Disconnect the spark plug cords from ignition
coil