Hello. I am up against the same issue, 2007 e70 X5, N62TU, timing chain guides worn and probably chains stretched. I am hoping to be able to do this work with engine in car and not to remove the heads. Can the oil pump chain be removed with the oil pans installed, or does the oil pump gear have to be removed and can the be done with oil pans still on? Any advice to this work with engine in car would be helpful. Thanks.
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