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Home >> Jeep >> 2004 >> Grand Cherokee Overland, AWD >> Repair and Diagnosis >> Engine Performance >> Ignition System >> Ignition Control >> Spark Plug >> Cleaning >> 4.7L H.O. Engine

4.7L H.O. Engine

Never clean spark plugs on the 4.7L H.O. engine. Damage to the platinum rivet on the center electrode will result.

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