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Fixedwheelnut
Did an oil change on my bmw (523i n52b engine) and the sump plug took a while to unthread. When I tried to tighten up it just spins when it gets tight.
I don’t fancy replacing the sump. Are the helicoil kits easy to fit?
Or retap next size up m13 x 1.5 and larger bolt? Aluminium sump