E46Fanatics - View Single Post - M54 Oil pump nut warning.
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Old 06-04-2007, 10:31 AM   #20
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Join Date: May 2004
Location: Bethlehem, PA
Posts: 918
My Ride: 2004 330i
M54 oil pump shafts are starting to fail regularly, especially when they see track use.
I learned this back in 2002. At first we tried everything but soon learned that the shaft is just a bad design and no amount of welding, red Loctite and safety wire will fix the problem. I figured that in a few years, everyone would start seeing this same problem as the cars got older and more people started to track their cars.

I expect that people will soon start kicking out the bottom ends when they miss downshifts (i.e. 5th to 2nd). I can tell you that zinging the motor to around 10500 rpm will blow out three rods.

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