Ignition (h4so Engine) Subaru Impreza WRX GD/GG рестайлинг 2

SPECIFICATION

IGNITION COIL SPECIFICATION

Identifying Ignition System Components. Scheme 6

Tightening torque: N.m (kgf-m, ft-lb)

T1: 6.4 (0.65, 4.7)

T2: 21 (2.1, 15.2)

CAUTION

1. Wear work clothing, including a cap, protective goggles, and protective shoes during operation.
2. Remove contamination including dirt and corrosion before removal, installation or disassembly.
3. Keep the disassembled parts in order and protect them from dust and dirt.
4. Before removal, installation or disassembly, be sure to clarify the failure. Avoid unnecessary removal, installation, disassembly and replacement.
5. Be careful not to burn yourself, because each part on the vehicle is hot after running.
6. Be sure to tighten fasteners including bolts and nuts to the specified torque.
7. Place shop jacks or rigid racks at the specified points.
8. Before disconnecting electrical connectors of sensors or units, be sure to disconnect the ground cable from battery.

REMOVAL

Spark plug

< Ref. to SPECIFICATION , General Description. >

Scheme 7

Scheme 8

1. Disconnect the ground cable from battery.
2. Remove the air cleaner case. < Ref. to «REMOVAL»(/subaru/impreza-wrx/gdgg-2-2005-2007/remont/mechanical/#intake-induction-h4so-engine), Air Cleaner Case. >
3. Remove the spark plug cords by pulling the boot. (Do not pull the cord itself.) (Scheme 7): Identifying Spark Plug Cords
4. Remove the spark plug with a spark plug socket. (Scheme 8): Removing Spark Plug With Spark Plug Socket

Scheme 9

Scheme 10

1. Remove the battery.
2. Remove the spark plug cords by pulling the boot. (Do not pull the cord itself.) (Scheme 9): Identifying Spark Plug Cords
3. Remove the spark plug with a spark plug socket. (Scheme 10): Removing Spark Plug With Spark Plug Socket

RH SIDE

Install in the reverse order of removal.

Tightening torque

21 N.m (2.1 kgf-m, 15.2 ft-lb)

Note. 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 approx. 1/3 of the specified torque in order to avoid over-stressing.

LH SIDE

Install in the reverse order of removal.

Tightening torque

21 N.m (2.1 kgf-m, 15.2 ft-lb)

Note. 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 approx. 1/3 of the specified torque in order to avoid over-stressing.

INSPECTION

Check the electrodes and inner and outer ceramic insulator of plugs, noting the type of deposits and the degree of electrode erosion.

Identifying Spark Plug Gap And Carbon Accumulation Or Wear. Scheme 11

Scheme 12

Scheme 13

Scheme 14

Scheme 15

1. Normal: Brown to grayish-tan deposits and slight electrode wear indicate correct spark plug heat range. (Scheme 12): Identifying Normal Spark Plug Condition
2. 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 and dirty air cleaner. (Scheme 13): Identifying Carbon Fouled Spark Plug Condition
3. Oil fouled: Wet black deposits show excessive oil entrance into combustion chamber through worn rings and pistons or excessive clearance between valve guides and stems. (Scheme 14): Identifying Oil fouled Spark Plug Condition
4. Overheating: White or light gray insulator with black or brown spots and bluish burnt electrodes indicate engine overheating. Moreover, the appearance results from incorrect ignition timing, loose spark plugs, wrong selection of fuel, etc. (Scheme 15): Identifying Overheated Spark Plug Condition CAUTION: Avoid using a plug cleaner because of the spark plug with a platinum tip.

ADJUSTMENT

Clean the spark plugs with a wire brush. Clean and remove the carbon or oxide deposits, but do not wear away ceramic insulator.

If deposits are too stubborn, replace the plugs. After cleaning the spark plugs, correct the spark plug gap using a gap gauge.

Note. Do not use spark plug cleaners, because the spark plugs are applied with platinum tips.

Spark plug gap L

1.0 - 1.1 mm (0.039 - 0.043 in)

Identifying Spark Plug Gap. Scheme 16

Scheme 17

Scheme 18

1. Disconnect the ground cable from battery.
2. Disconnect the spark plug cords from ignition coil and ignitor assembly. (Scheme 17): Locating Spark Plug Cords From Ignition Coil And Ignitor Assembly
3. Disconnect the connector (A) from ignition coil and ignitor assembly.
4. Remove the bolt (B) which secures the ignition coil and ignitor assembly to intake manifold. (Scheme 18): Identifying Ignition Coil And Ignitor Assembly Bolt

INSTALLATION

Install in the reverse order of removal.

Tightening torque

6.4 N.m (0.65 kgf-m, 4.7 ft-lb)

Check the following using a tester. Replace if defective.

1. Secondary coil resistance

Specified resistance

[Secondary side]

Between (A) and (B)

11.7 kohms ± 15%

Between (C) and (D)

11.7 kohms ± 15%

Locating Spark Plug Cords. Scheme 19

Check the following items

Scheme 20

1. Damage to cords, deformation, burning, or rust formation of terminals
2. Resistance values of cords Resistance value: #1 cord: 7.1 - 12.1 kohms #2 cord: 12.1 - 19.9 kohms #3 cord: 7.7 - 13.0 kohms #4 cord: 12.3 - 20.2 kohms (Scheme 20): Checking Spark Plug Cords

See also:
• REMOVAL
• SPECIFICATION