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Home >> Kia >> 2017 >> Optima EX >> Repair and Diagnosis >> Engine Performance >> Ignition System >> Ignition System - 2.4L (Except HEV) >> Repair Procedures >> Inspection >> Cleaning >> [1st Method]
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[1st Method]

  1. Start the engine and keep the engine running at idle for 2 minutes.
  2. Step on the accelerator pedal and hold it steady at 4500 rpm with the shift lever in N position to warm up the engine until the temperature of the engine coolant reaches 80°C.
  3. Keep the engine running at 2500 - 3000 rpm in the N position for 15 minutes.
Fig 1: Engine Running (2500-3000) RPM In N Position For 15 Minutes
G12146737Courtesy of KIA MOTORS AMERICA, INC.