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2005
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Optima L4-2.4L
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Repair and Diagnosis
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Powertrain Management
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Ignition System
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Spark Plug
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Specifications
Spark Plug: Specifications
NGK
PRG5C-11
Champion
RN10PYP4
Gap
1.0-1.1 mm (0.039-0.043 in.)
Torque
20-30 Nm (204-306 kg.cm, 15-21 Ib.ft)