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5) Remove spark plugs with the spark plug socket.
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CAUTION:
All spark plugs installed on an engine, must be
of the same heat range.
Spark plug:
NGK: PFR6G
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1) Disconnect battery ground cable.
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1) Disconnect battery cables, and then remove battery and battery carrier.
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2) Remove air cleaner lower case. <Ref. to IN(DOHC TURBO)-7, REMOVAL, Air Cleaner.>
3) Disconnect connector from ignition coil.
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2) Disconnect washer motor connector (A).
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3) Disconnect rear window glass washer hose from washer motor, then plug connection with a suitable cap.
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4) Remove the two bolts which hold the washer tank, then take the tank away from the working area.
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1) Install in the reverse order of removal.
Tightening torque (Spark plug): 21 Nm (2.1 kgf-m, 15 ft-lb)
Tightening torque (Ignition coil): 16 Nm (1.63 kgf-m, 11.8 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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5) Disconnect connector from ignition coil.
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1) Install in the reverse order of removal.
Tightening torque (Spark plug): 21 Nm (2.1 kgf-m, 15 ft-lb)
Tightening torque (Ignition coil): 16 Nm (1.63 kgf-m, 11.8 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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7) Remove spark plug with the spark plugs socket.
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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.
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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.
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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.
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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. After cleaning spark plugs, recondition firing surface of electrodes with file. Then correct the spark plug gap using a gap gauge.
Spark plug gap: L
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.
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