I had the water pump fail on two of my CDIs...one at about 150k, the other about 210k. "Coolant Low" message was the telltale indicator. I couldn't find a bad leak, or coolant in the oil, or white exhaust. It was a slow leak while driving, nothing even on the garage floor.
Neither of mine however, failed catastrophically like yours. I never lost the belt or gouged the block.
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Mark in MA
05 MB E320CDI 402k Granite Grey Metallic
05 MB E320CDI 267k Black
05 MB E320CDI 232k White
05 MB E320CDI 209k Tectite Grey
99 Dodge 2500 Cummins 5sp 148k
62 Jeep CJ-6 120k
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