Vibration above 7000 RPM in 3rd gear

BBZ4MC · 07-22-2018, 10:30 AM

I changed the oil and on a max acceleration run, I noticed a metallic vibration/rattle from the engine around 7000rpm, until red line. Almost like that sound from a CSL airbox when the valve opens, but it is a bit disconcerting because I've never noticed it before. I do believe the oil is a bit overfilled, so I will remove some today and check it out.

Any ideas?

(2007 Z4MC with almost 63k miles)

Thanks, Brian

Finnegan · 07-23-2018, 02:02 AM

Many possibilities, impossible to tell without hearing it (video/audio).

Crazy but not really horrible possibilities:

A. Strut tower to firewall bolts are loose. There are two types. The older nut on fixed bolt needs locktite. There's a thread/post I did on this ages ago with torque specs.

B. Motor mount(s), mount bolt(s).

C. None of the above

Keep this thread updated as more info is gathered

07-22-2018, 10:30 AM	#1
BBZ4MC New Member 2 Rep 6 Posts Drives: 2007 Z4 M Coupe Join Date: Feb 2018 Location: Atlanta iTrader: (0) Garage List 2015 Jeep Cherokee ... [0.00] 2007 BMW Z4 M Coupe [5.00]	Vibration above 7000 RPM in 3rd gear I changed the oil and on a max acceleration run, I noticed a metallic vibration/rattle from the engine around 7000rpm, until red line. Almost like that sound from a CSL airbox when the valve opens, but it is a bit disconcerting because I've never noticed it before. I do believe the oil is a bit overfilled, so I will remove some today and check it out. Any ideas? (2007 Z4MC with almost 63k miles) Thanks, Brian
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07-23-2018, 02:02 AM	#2
Finnegan Dog Listener 701 Rep 7,850 Posts Drives: Z4M/. Z3M, E36/46 M3 Join Date: Oct 2008 Location: Teaching the dog to slalom iTrader: (22)	Many possibilities, impossible to tell without hearing it (video/audio). Crazy but not really horrible possibilities: A. Strut tower to firewall bolts are loose. There are two types. The older nut on fixed bolt needs locktite. There's a thread/post I did on this ages ago with torque specs. B. Motor mount(s), mount bolt(s). C. None of the above Keep this thread updated as more info is gathered
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