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Because the rear IMS sprocket is a press fit on the shaft, and can be dislodged with the set screws (a situation that cannot be corrected without taking the engine apart), I am not a big fan of the set screw method.
When the engine is locked at TDC, and the cams are locked off with the proper tool(s), nothing can move. With the tensioners removed, replacing the IMS bearing is straight forward, and without risk.
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“Anything really new is invented only in one’s youth. Later, one becomes more experienced, more famous – and more stupid.” - Albert Einstein
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