SPARK PLUG
Ignition
2. Spark Plug
S161003
(3) Remove air intake duct as a unit.
A: REMOVAL
S161003A18
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CAUTION:
All spark plugs installed on an engine, must be
of the same heat range.
Spark plug:
With catalyst model: CHAMPION
RC10YC4
Without catalyst model: NGK BKR6E
1. RH SIDE S161003A1805
1) Disconnect battery ground cable.
(4) Remove resonator chamber.
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2) Remove air intake duct and resonator chamber. (1) Remove bolt which installs air intake duct on the front side of body.
3) Remove spark plug cords by pulling boot, not cord itself.
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4) Remove spark plugs with the spark plug socket.
(2) Remove bolt which installs air intake duct on body.
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IG(SOHCw/oOBD)-5
SPARK PLUG
Ignition
2. LH
S161003A1806
5) Remove spark plugs cord by pulling boot, not cord itself.
1) Disconnect battery ground cable.
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2) Disconnect washer motor connector.
6) Remove spark plug with the spark plug socket.
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3)   Disconnect rear window glass washer hose from washer motor, then plug connection with a suitable cap.
4)   Remove the two bolts which hold the washer tank, then take the tank away from the working area.
B: INSTALLATION
S161003A11
1. RH SIDE S161003A1105
Install in the reverse order of removal.
Tightening torque (Spark plug): 21 Nm (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 (Resonator chamber): 32 Nm (3.3 kgf-m, 24 ft-lb)
2. LH SIDE S161003A1106
Install in the reverse order of removal.
Tightening torque (Spark plug): 21 Nm (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.
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IG(SOHCw/oOBD)-6
SPARK PLUG
Ignition
C: INSPECTION
S161003A10
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. If same condition remains after repair, use a hotter plug.
Check electrodes and inner and outer porcelain of plugs, noting the type of deposits and the degree of electrode erosion.
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(A)     Electrode gap
(B)    Carbon accumulation or wear
(C)    Cracks
(D)    Damage
(E)     Damaged gasket
1) Normal
Brown to grayish-tan deposits and slight electrode
wear indicate correct spark plug heat range.
4) Overheating
White or light gray insulator with black or gray brown spots and bluish burnt electrodes indicate engine overheating. Moreover, the appearance results from incorrect ignition timing, loose spark plugs, wrong selection of fuel, hotter range plug, etc. It is advisable to replace with plugs having colder heat range.
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2) Carbon fouled
Dry fluffy carbon deposits on insulator and electrode are mostly caused by slow speed driving in city, weak ignition, too rich fuel mixture, dirty air cleaner, etc.
It is advisable to replace with plugs having hotter heat range.
D: CLEANING
S161003E56
Clean spark plugs in a sand blast type cleaner. Avoid excessive blasting. Clean and remove carbon or oxide deposits, but do not wear away porcelain. If deposits are too stubborn, replace plugs.
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IG(SOHCw/oOBD)-7
SPARK PLUG
Ignition
E: ADJUSTMENT
S161003A01
Correct it if the spark plug gap is measured with a gap gauge, and it is necessary.
Spark plug gap: L With catalyst:
1.0 -1.1 mm (0.039 - 0.043 in) Without catalyst:
0.7-0.8 mm (0.028 - 0.031 in)
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NOTE:
Replace with new spark plug if this area is worn to
"ball" shape.
IG(SOHCw/oOBD)-8