The Random E46/ZHP Question Thread

[ZHPizza]

Honest to god I have to stop posting here. Of course!

Negative... you can't learn if you don't ask questions or discuss problems!

+1 this is one of those bizarre things that you should always post up because someone at sometime has had the same issue and figured it out

[joeybananaz18]

I put on my winters a couple of weeks ago and noticed a light shimmy in the steering wheel under braking. Never had this issue when my apexs were on and it doesn’t happen under acceleration or regular driving, just braking. Any idea what I should check?


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[ZHPizza]

So I've got this loud hum? that comes from under the car around 68-72mph, peaking at 70. It's not a high pitch whine, but sounds like engine/drivetrain noise. Just grows in volume at one speed then goes away when you get away from 70. It only does it when lightly accelerating. No noise when letting off at 80mph and dropping through the zone. It started after I installed a used 3.38 diff and I thought it was an exhaust leak becoming apparent at a certain rpm, but I tested it in 5th and 6th to confirm that it's road speed related, not engine. Gear wear?

Or CSB? Anybody?

[DeathTrap]

Or CSB? Anybody?

Or flex disc? Or driveshaft? I'd say something is off with the diff since that was the last thing replaced.

[BMWCurves]

Or CSB? Anybody?

Something in the driveline would be my first guess. My only other guess would be some bracket that has come loose somewhere in there like the exhaust and vibrates at a certain frequency, but it wouldn't quite match your symptoms.

[Sockethead]

If it was a problem with the diff like too much backlash, it would change pitch or go away when letting off the gas which kinda sounds like what you are describing
Did you swap the pinion flange when you put it in?

[johnrando]

Favorite Wheel Studs? I bought some Turner ones and they rusted a bit, plus they didn't have the allen wrench feature, and they were lacking in the "looks" department, as it's all "thread". Hieu and I took mine out this week. He has a set I am considering that are stronger and has the allen wrench end, but I am interested in other options, especially ones that have a strong coating for a clean look, bullet nose, and an allen wrench end. I am not finding anything that really stands out yet. Any ideas?

[704sw]

Favorite Wheel Studs? I bought some Turner ones and they rusted a bit, plus they didn't have the allen wrench feature, and they were lacking in the "looks" department, as it's all "thread". Hieu and I took mine out this week. He has a set I am considering that are stronger and has the allen wrench end, but I am interested in other options, especially ones that have a strong coating for a clean look, bullet nose, and an allen wrench end. I am not finding anything that really stands out yet. Any ideas?

I think any of the hex nose are going to be subject to rusting, where the bullet nose removes that “pocket” where water can sit. I wish I had bullet nose for that reason, but I just make sure to get the air gun (read: electric leaf blower) on there when I’m drying off the car after a bath.

I have Apex brand hex nose studs, 75mm I think. They’re way too long for my preference without spacers, but look nice when the spacers shorten the amount of exposed thread.

[Vas]

Favorite Wheel Studs? I bought some Turner ones and they rusted a bit, plus they didn't have the allen wrench feature, and they were lacking in the "looks" department, as it's all "thread". Hieu and I took mine out this week. He has a set I am considering that are stronger and has the allen wrench end, but I am interested in other options, especially ones that have a strong coating for a clean look, bullet nose, and an allen wrench end. I am not finding anything that really stands out yet. Any ideas?

Check this place out.

https://motorsporthardware.com/produ...nversion-kits/

[ZHPizza]

Or flex disc? Or driveshaft? I'd say something is off with the diff since that was the last thing replaced.

Something in the driveline would be my first guess. My only other guess would be some bracket that has come loose somewhere in there like the exhaust and vibrates at a certain frequency, but it wouldn't quite match your symptoms.

If it was a problem with the diff like too much backlash, it would change pitch or go away when letting off the gas which kinda sounds like what you are describing
Did you swap the pinion flange when you put it in?

Yeah that's why I was thinking diff issue. I only swapped the output flanges, didn't touch the input flange since it was a 3.38. Could that be due to wear? It had like 175k on it and I have no way of knowing if it was run low on fluid.