Knocking sound from engine

robonut5B to Mechanic Advice@gearhead.townEnglish · 10 months ago

I have a 2008 Kia Optima lx with a 2.4 that has a loud knocking noise while running. There isn’t any visible damage to the pistons and it idles smooth and the oil looks good. I’m at a loss for what to do next

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