Subaru Legacy III (2000-2003 year). Manual - part 200

IG(H4SOw/oOBD)-2

IGNITION

GENERAL DESCRIPTION

1. General Description

A: SPECIFICATIONS

Item

Designation

Ignition coil and ignitor 
assembly

Model

FH0137

Manufacturer

DIAMOND

Primary coil resistance

0.73 

Ω±

10%

Secondary coil resistance

12.8 k

Ω±

15%

Insulation resistance between primary terminal and 
case

More than 100 M

Ω

Spark plug

Type and manufacturer

Without catalytic con-
verter

BKR6E .......... NGK

With catalytic converter

RC10YC4 .......... CHAMPION
BKR5E-11 .......... NGK (Alternate)

Thread size

mm

14, P = 1.25

Spark gap

Without catalytic 
converter

mm (in)

0.7 — 0.8 (0.028 — 0.031)

With catalytic 
converter

mm (in)

1.0 — 1.1 (0.039 — 0.043)

IG(H4SOw/oOBD)-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)

(3) Ignition coil and ignitor ASSY

T2: 6.4 (0.65, 4.7)

IG-00036

T2

T1

T1

( 2 )

( 2 )

( 1 )

( 4 )

( 4 )

( 3 )

( 1 )

IG(H4SOw/oOBD)-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 corro-
sion before removal, installation or disassembly.
• Keep the disassembled parts in order and pro-
tect them from dust or dirt.
• Before removal, installation or disassembly, be
sure to clarify the failure. Avoid unnecessary re-
moval, installation, disassembly, and replacement.
• Be careful not to burn your hands, because each
part on the vehicle is hot after running.
• Be sure to tighten fasteners including bolts and
nuts to the specified torque.
• Place shop jacks or safety stands at the specified
points.
• Before disconnecting electrical connectors of
sensors or units, be sure to disconnect ground ca-
ble from battery.

IG(H4SOw/oOBD)-5

IGNITION

SPARK PLUG

2. Spark Plug

A: REMOVAL

CAUTION:
All spark plugs installed on an engine, must be 
of the same heat range.

Spark plug:

With catalytic converter

CHAMPION: RC10YC4
NGK: BKR5E-11 (Alternate)

Without catalytic converter

NGK: BKR6E

1. RH SIDE

1) Disconnect battery ground cable.

2) Remove resonator chamber. <Ref. to IN(H4SO)-
8, REMOVAL, Resonator Chamber.>
3) Remove spark plug cords by pulling boot, not
cord itself.

4) Remove spark plugs with the spark plug socket.

2. LH SIDE

1) Disconnect battery ground cable.

2) Disconnect washer motor connector.

3) Disconnect rear window glass washer hose from
washer motor, then plug connection with a suitable
cap.
4) Remove the two bolts which hold the washer
tank, then take the tank away from the working ar-
ea.

5) Remove spark plugs cord by pulling boot, not
cord itself.

FU-00009

IG-00070

IG-00071

FU-00009

IG-00019

IG-00020

IG-00072