2005 Subaru Outback RFACTORY OEM SERVICE PROCEDURE

Spark Plug: Adjustment

Clean the spark plugs using a wire brush.

Clean and remove the carbon or oxide deposits. But do not wear away ceramic insulator at this time. If deposits are too stubborn, replace the spark plugs.

NOTE: Do not use a plug cleaner because the spark plugs are applied with iridium tip.

Spark plug gap L:Β 

0.7-0.8 mm (0.028-0.031 in)Β 

Fig 1: Adjusting Spark Plug Gap
G03830760Courtesy of SUBARU OF AMERICA, INC.
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.

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