Z4 Roadster (E85) Metallic rattling sound at start-up - Bimmerfest - BMW Forums

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E85 / E86 Z4 (2003-2008)
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Old 10-18-2012, 01:41 AM
Liamket Liamket is offline
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Location: Pittsburgh, PA
Join Date: May 2012
Posts: 55
Mein Auto: 2006 Z4 3.0si
Metallic rattling sound at start-up

I've noticed my Z ('06 3.0si) is making an awful rattling sound when I first start it up. It sounds like metal flapping around, and sounds like its coming from the passenger side of the engine compartment. It's only happened a few times, but enough for me to begin worrying.

Any thoughts? I know that's not much info to go off of, but I'll do my best to answer any questions and follow any diagnostic recommendations.
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Old 10-18-2012, 03:40 PM
keeton keeton is offline
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Location: Atlanta, GA
Join Date: Jul 2008
Posts: 179
Mein Auto: '07 3.0si
The hydraulic valve lifters are a common issue with the N52 engine and will make a noise similar to what you described. Search "lifters" in this forum and you will find several threads discussing the issue. Some have had good luck just replacing the lifters, some have replaced the entire cylinder head and some have just learned to live with it.
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Old 10-26-2012, 02:00 PM
goeslikeschnell goeslikeschnell is offline
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Location: San Jose, CA
Join Date: Jun 2012
Posts: 25
Mein Auto: 2006 Z4 3.0si roadster
i've noticed that on mine that if i drive it a couple times not too far distances so the car doesn't really get too warm and then let it sit overnight (like in the garage) I get some metallic ticking noises, which goes away if i take it out on the highway for 20 mins or so and let the oil get warm and lube everything up. the M54 in my 330i did the same thing.
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