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Old 03-29-2010, 05:14 PM   #1
Michel
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E36/E46 Oil Pump Nut

Anyone of you guys ever have a problem with this? I've been reading lately about people with S52's and most E46's that have had the nut come out resulting in some pretty catastrophic failure.

How concerned should one be about this??! I'm hoping to raise my rev limiter to 7000-7200rpm (due to schrick cams) on my M54b30 and am kinda worried about this now!

Any high powered (or high revving) S52's or M54's ever have this problem?

Thanks!
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Old 03-29-2010, 05:31 PM   #2
Steve30
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It's happened enough that I'm worried about it. I'm probably going to drop the oil pan when the weather gets warmer and give it a nice tack weld or loctite it. It's a bitch of a job though...
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Old 03-29-2010, 06:09 PM   #3
Jon@Bimmersport
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Michel,

Vac has your solution. A welded nut can cause you to be in big shit if its not done properly. From what I know, this is due to the crankshaft balancing/vibration from the engine causing this. I however, will be doing mine as well at one point with the VAC oil pump/baffle kit.

Although this is more common on motors consistently above 4k RPM and seeing a lot of pressure...but its better to be save than sorry.

FYI,

We have to lower front subframe...so might as well get those plates, and a baffle kit (more important!)
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Old 03-29-2010, 06:27 PM   #4
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good info, I guess this is the kit you are referring to.

http://store.nexternal.com/vacmotors...kit-p1041.aspx
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Old 03-29-2010, 07:47 PM   #5
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Apparently there is an updated version of the nut on ZHP's, check here:

http://forum.e46fanatics.com/showthread.php?t=714263

Jon, wouldn't loctite suffice for a non dedicated track car like mine? lol
This is making me paranoid to even drive the car!! :@
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Old 03-29-2010, 07:58 PM   #6
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well apparently the nut/loctite doesn't correct the problem 100% as the shaft can still shear off so the VAC motorsport kit looks like the best option.
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Old 03-29-2010, 10:46 PM   #7
braindamage
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VAC solution is nice but is more for heavily tracked car. If you just worry about it coming off, Bimmerworld has a $10.00 solution which is a drill nut and a wire.
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Old 03-30-2010, 10:18 PM   #8
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Off topic sorta, did you upgrade your springs as well when you did your cams to raise your redline?
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Old 03-30-2010, 11:43 PM   #9
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^nope, M54's have hydraulic lifters that are apparently good for something like 7600rpm before 'floating'... anything higher would recommend a solid lifter conversion; but either way I bought the Schrick 264/248 (not 272/256?) profile cams which have a lower rev range. I think the max I will have it tuned for is 7000rpm - still going to consult bimmersport and AA before doing so
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