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Re: GM 4cyl ecotech water pump
Posted to Technical Discussion Forum on 1/22/2020 1 Reply

Good eye Beevo. The Ecotec uses a very long shallow Woodruff style key in the crankshaft that the balance chain sprocket, crankshaft sprocket and harmonic balancer all slide over.

There are protrusions at each end that overhang and prevent the key from rocki... Login to read more.

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