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coolant cooler egr

  1. RAM 1500 Diesel Mechanical
    Hey guys, new to the forum. Got a ‘16 Ram 1500 eco 4x4 with 54,000 miles and over time I’ve noticed my coolant overflow tank look a stained yellow/brown on the inside. Doesn’t look black or like there’s any oil mixed in the coolant but not sure what would he the cause. Anyone else have similar...
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