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Subaru Workshop Service and Repair Manuals

Compression Check > < Spark Plug|Specifications|Page 698
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Spark Plug: Service and Repair

REMOVAL

1.

Remove items that may be in the way.

2.

While wearing safety glasses, use compressed air to blow out debris from plug well.

3.

Using a spark plug socket, remove the plug in CCW direction.

INSTALLATION

1.

Adjust electrode gap.

Spark Plug Gap:  1.0 - 1.1 mm (0.039 - 0.043 in) 

2.

Lightly coat threads of plug with anti-seize compound.

3.

Install and thread plug into cylinder head by hand.

4.

Torque spark plug.

Spark Plug Torque:  20 - 29 Nm (14 - 22 ft.lb) 

RECOMMENDED SPARK PLUGS

NGK

PFR6B-11

NIPPONDENSO

PKR20PR-11 

Compression Check > < Spark Plug|Specifications|Page 698