even if you found it was leaking, it can still be replaced with the regular type. I'm yet to see a crankshaft so worn it requires the need for the repair version. The repair version just moves the edge of the seal slightly to a different spot on the crankshaft.

I suppose a taxi might eventually damage the crank not by the million miles they put on the cars but by engine hours running..

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1995 E300 Diesel