Altima 2.5 L4-2.5L (QR25DE) (2002)
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Do not use a wire brush for cleaning.
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If plug tip is covered with carbon, spark plug cleaner may be used.
Cleaner air pressure: Less than 588 kPa (6 kg/sq.cm, 85 psi)
Cleaning time: Less than 20 seconds
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Checking and adjusting plug gap is not required between change intervals.
5. Install the ignition coils.
Ignition coil bolt
Tightening Torque : 5.4 - 7.3 N.m (0.55 - 0.75 kg.m, 48 - 65 in-lb)