Sentra L4-2.5L (QR25DE) (2003)
The hot type spark plug is suitable when fouling occurs with the standard type spark plug under conditions such as:
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Frequent engine starts
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Low ambient temperatures
The cold type spark plug is suitable when spark knock occurs with the standard type spark plug under conditions such as:
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Extended highway driving
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Frequent high engine revolution
CAUTION: Do not use wire brush for cleaning. If plug is covered with carbon, spark plug cleaner may be used.
Cleaner air pressure.................Less than 588 kPa (6 kg/cm2, 85 psi)
Cleaning time:.................less than 20 seconds
Checking and adjusting plug gap is not required between change intervals.
4. Install spark plugs.
Spark plug:............................20 - 29 Nm (2.0 - 3.0 kg-m, 14 - 22 ft. lbs.)
5. Install ignition coils and reconnect ignition wires according to numbers indicated on them.
Ignition coils:........................5.4 - 7.3 Nm (0.55 - 0.73 kg-m, 46 - 64 inch lbs.)