2003 Subaru Outback F6-3.0LFACTORY OEM SERVICE PROCEDURE

Removal and Installation

Ignition System:

Factory service manual diagram





REMOVAL

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

Spark plug:
NGK: PLFR6A-11

RH SIDE

Factory service manual diagram



1. Disconnect battery ground cable.
2. Remove air cleaner lower case.
3. Disconnect connector from ignition coil.

Factory service manual diagram



4. Remove ignition coil.

Factory service manual diagram



5. Remove spark plugs with the spark plug socket.

LH SIDE

Factory service manual diagram



1. Disconnect battery cables and then remove battery and battery carrier.

Factory service manual diagram



2. Disconnect washer motor connector.

Factory service manual diagram



3. Remove the two bolts which hold the washer tank, then take the tank away from the working area.
4. Disconnect connector from ignition coil.

Factory service manual diagram



5. Remove ignition coil.

Factory service manual diagram



6. Remove spark plug with the spark plugs socket.

INSTALLATION

RH SIDE
Install in the reverse order of removal.

Tightening torque (Spark plug): 21 N.m (2.1 kgf-m, 15 ft-lb)

CAUTION: The above torque should be only applied to new spark plugs without oil on their threads. In case their threads are lubricated, the torque should be reduced by approximately 1/3 of the specified torque in order to avoid over-stressing.

Tightening torque (Ignition coil): 16 N.m (1.6 kgf-m, 12 ft-lb)

LH SIDE
Install in the reverse order of removal.

Tightening torque (Spark plug): 21 N.m (2.1 kgf-m, 15 ft-lb)

CAUTION: The above torque should be only applied to new spark plugs without oil on their threads. In case their threads are lubricated, the torque should be reduced by approximately 1/3 of the specified torque in order to avoid over-stressing.

Tightening torque (Ignition coil): 16 N.m (1.6 kgf-m, 12 ft-lb)

Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.