Z4 M w/ ESS Supercharger. Rattle during engine shut off

jdm_gadget · 04-03-2018, 07:04 AM

I recently purchased a 2006 Z4 M coupe. It got a ESS Supercharger stage 1 kit. Everything else is pretty much stock. Motor got 90k mile. The supercharger was installed 40k mile's ago. The car drives great, still pulls pretty hard. The only thing that's bothering me is a rattle around the supercharger during engine shut off. With the clutch in or out its still the same. It's a very noticeable sound, but I'm not sure if It's normal. I made a short clip, maybe someone can chime in. Just listen to the rattle as the motor is shutting off.

https://youtu.be/nGZq58jjsV8

Thanks,
Dan

garz747 · 04-03-2018, 08:56 AM

Sounds like the bearings in the supercharger housing are dry or worse-worn.

Beedub · 04-04-2018, 11:10 AM

sounds pretty normal to me, these blowers add loads of mechanical noises.....

As long as theirs no play in the pulley i wouldn't be worried, of course make sure the oil level in the blower is good.

04-03-2018, 07:04 AM	#1
jdm_gadget Private 1 Rep 57 Posts Drives: 08 M6 Join Date: Sep 2010 Location: SoCal SGV iTrader: (0)	Z4 M w/ ESS Supercharger. Rattle during engine shut off I recently purchased a 2006 Z4 M coupe. It got a ESS Supercharger stage 1 kit. Everything else is pretty much stock. Motor got 90k mile. The supercharger was installed 40k mile's ago. The car drives great, still pulls pretty hard. The only thing that's bothering me is a rattle around the supercharger during engine shut off. With the clutch in or out its still the same. It's a very noticeable sound, but I'm not sure if It's normal. I made a short clip, maybe someone can chime in. Just listen to the rattle as the motor is shutting off. https://youtu.be/nGZq58jjsV8 Thanks, Dan
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04-03-2018, 08:56 AM	#2
garz747 Captain 286 Rep 679 Posts Drives: 07 Z4MC 01 330i 18 X3 M40i Join Date: Jul 2015 Location: Toronto iTrader: (0)	Sounds like the bearings in the supercharger housing are dry or worse-worn.
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04-04-2018, 11:10 AM	#3
Beedub Major General 423 Rep 5,329 Posts Drives: 2007 Z4 M roadster vt2-500 Join Date: Sep 2007 Location: UK iTrader: (0)	sounds pretty normal to me, these blowers add loads of mechanical noises..... As long as theirs no play in the pulley i wouldn't be worried, of course make sure the oil level in the blower is good. __________________ Z4MR VT2 - Clubsport build. Multi award winning Detailing \| Wrap \| PPF specialists UK based - www.topwrapz.com
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