Mitsubishi water pump, driven by the timing belt in an interference engine. That just seems like a recipe for disaster, or at the very least a rather expensive replacement for a fairly simple, easily worn part.

I don’t like it, but when doing the timing belt on the M20 in the 525i I always replace the water pump since I have the engine apart already. But if that relatively inexpensive pump should fail it wouldn’t cause pistons to meet valves, unlike the Mitsu.


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