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Originally Posted by thom4782
Jake - there was oil in the IMS tub
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Then you were at Stage II bearing failure, at least. Period.
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Youch! the groove cut down the side of the key at the highest stress concentration screams, "break me!", and where does the punched out piece from the solid end of the IMS go? Through the new bearing if it's not retrieved. The concept is outstanding, but the execution leaves me cold
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Attend my class and you'll learn all about this. See that broken factory oil pump drive key? That cost me 25K back in 2009, I'd never even consider milling a pathway down the edge of one of these units. All that does is create one continuous, longitudinal, stress riser. I also have another pic that I won't post in public, at least not yet.
Punching a hole in the center of the aluminum end plug within the IMS shaft also compromises the press fit of this component. Anyone who has seen mode of failure #8, (where the aluminum plug dislodges and allows the oil pump drive to fall into the IMS tube during operation) would also never consider doing this.