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Water pump leak after rebuild (e30, m20)

Discussion in 'E30 (1984-1993)' started by porquewhy, Apr 29, 2008.

    porquewhy guest

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    I just finished rebuilding my '90 325is after 8 years of working on it off and on (mostly off). The last step in the process was to top off the coolant. At this point a slow leak was found at the base of the water pump (see image 1). It's a completely rebuilt engine. It's a new water pump and gasket. All bolts were properly torqued. I am trying to determine what the issue could be before I tear down the engine again.


    I had the engine hot tanked to clean it. Could this plug be the culprit?


    Any ideas would be appreciated.

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