Subaru Outback manuals

Subaru Outback: Ignition

General Description

A: SPECIFICATION

Subaru Outback. Ignition

B: COMPONENT

Subaru Outback. Ignition

  1. Spark plug
  2. Ignition coil

Tightening torque: N*m (kgf-m, ft-lb)
T1: 9 (0.9, 6.6)
T2: 21 (2.1, 15.5)

C: CAUTION

Spark Plug

A: REMOVAL

Spark plug: Refer to "SPECIFICATION" for the spark plug. <Ref. to IG(H4SO)-2, SPECIFICATION, General Description.>

1. RH SIDE

1) Disconnect the ground cable from battery.

Subaru Outback. Ignition

2) Remove the air cleaner case. <Ref. to IN(H4SO)-6, REMOVAL, Air Cleaner Case.>

3) Disconnect the connector (A) from the ignition coil.

4) Remove the bolt (B), and remove the ignition coil.

Subaru Outback. Ignition

5) Remove the spark plug with a spark plug socket.

2. LH SIDE

1) Disconnect the ground cable from battery.

Subaru Outback. Ignition

2) Disconnect the connector (A) from the ignition coil.

3) Remove the bolt (B), and remove the ignition coil.

Subaru Outback. Ignition

4) Remove the spark plug with a spark plug socket.

B: INSTALLATION

1. RH SIDE

Install in the reverse order of removal.

Tightening torque (Spark plug): 21 N*m (2.1 kgf-m, 15.5 ft-lb)

Tightening torque (Ignition coil): 9 N*m (0.9 kgf-m, 6.6 ft-lb)

2. LH SIDE

Install in the reverse order of removal.

Tightening torque (Spark plug): 21 N*m (2.1 kgf-m, 15.5 ft-lb)

Tightening torque (Ignition coil): 9 N*m (0.9 kgf-m, 6.6 ft-lb)

C: INSPECTION

1) Check the spark plug for abnormalities. If defective, replace the spark plug.

Subaru Outback. Ignition

  1. Terminal damage
  2. Crack or damage in insulator
  3. Damaged gasket

2) Check the spark plug electrode and condition of the insulator. If abnormal, check and repair the cause and replace the spark plug.

  1. Normal: Brown to grayish-tan deposits and slight electrode wear indicate correct spark plug heat range.

Subaru Outback. Ignition

  1. Carbon fouled: Dry fluffy carbon deposits on insulator and electrode are mostly caused by slow speed driving in the city, weak ignition, too rich fuel mixture, etc.

Subaru Outback. Ignition

  1. Oil fouled: Wet black deposits show oil entrance into combustion chamber through worn piston rings or increased clearance between valve guides and valve stems.

Subaru Outback. Ignition

  1. Overheating: White or light gray insulator with black or brown spots and bluish burnt electrodes indicate engine overheating, wrong selection of fuel, or loose spark plugs.

Subaru Outback. Ignition

3) Using a nylon brush, etc., clean and remove the carbon or oxide deposits from the spark plug. If deposits are too stubborn, replace the spark plugs.

After cleaning the spark plugs, check the spark plug gap "L" using a gap gauge. If it is not within the standard, replace the spark plug.

NOTE:

Spark plug gap L: Standard 1.0 - 1.1 mm (0.039 - 0.043 in)

Subaru Outback. Ignition

Ignition Coil

A: REMOVAL

Direct ignition type is adopted. Refer to "Spark Plug" for removal procedure. <Ref. to IG(H4SO)-3, REMOVAL, Spark Plug.>

B: INSTALLATION

Install in the reverse order of removal.

Tightening torque: 9 N*m (0.9 kgf-m, 6.6 ft-lb)

C: INSPECTION

For inspection procedure, refer to "Diagnostics for Engine Starting Failure". <Ref. to EN(H4SO)(diag)- 70, IGNITION CONTROL SYSTEM, Diagnostics for Engine Starting Failure.>

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