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Torque settings for Strut Brace?

Specific discussion about the E89 2009 Z4 (sDrive35is, sDrive35i, sDrive30i, sDrive23i)
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Dave1971
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Torque settings for Strut Brace?

Post by Dave1971 » Tue Jul 11, 2017 12:59 pm

Just before I start waving the spanners at my car I'd like to confirm the top mount bolts need torquing down to 34nm on the e89. Can anyone confirm this.

Cheers
Zed No 1 2004 e85 Z4 2.2 se
Zed No 2 2007 e85 Imola Red Z4MR
Zed No 3 2006 e85 Ruby Black 3.0si Roadster
Zed No 4 2009 e89 Deep see blue 35i sDrive
Zed No 5 2006 e85 Titan silver 3.0si Roadster
Zed No 6 2004 e85 Black Sapphire Alpina Roadster S Lux #073

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Dave1971
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Torque settings for Strut Brace?

Post by Dave1971 » Wed Jul 12, 2017 2:49 pm

Anyone?
Zed No 1 2004 e85 Z4 2.2 se
Zed No 2 2007 e85 Imola Red Z4MR
Zed No 3 2006 e85 Ruby Black 3.0si Roadster
Zed No 4 2009 e89 Deep see blue 35i sDrive
Zed No 5 2006 e85 Titan silver 3.0si Roadster
Zed No 6 2004 e85 Black Sapphire Alpina Roadster S Lux #073

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GuidoK
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Torque settings for Strut Brace?

Post by GuidoK » Wed Jul 12, 2017 3:26 pm

Do you mean the bolts that hold dont the 2 braces in the engine bay or the nuts that hold the top mount of the suspension strut.

The bolts that hold down the 2 braces in the engine bay are listed at 100Nm +105deg (+/-15deg), so 34Nm would be far to little.
Bolts should be replaced according to TIS.
They are m12 inv. torx bolts, is that correct?

If you're not replacing the bolts I would go easy on the +105deg because the bolts are already stretched.
You could use 120Nm maybe without deg. rotation.

The m8 nuts that hold down the upper shock mount, those need to be torqued down to 34Nm. But these are m8 nuts, NOT bolts.
(TIS also advises to replace these nuts. If not, you can use some blue loctite to ensure locking)


For more details maybe someone who actually has an e89 could chime in?
Z4 3.0i | ESS TS2+ | Quaife ATB LSD | Brembo/BMW performance BBK front/rear | Schrick FI cams | Schmiedmann headers+cats | fully polybushed | Vibra-technics engine mounts | H&R anti rollbars | KW V3 coilovers | Sachs Race Engineering clutch

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Jollyjoiner
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Torque settings for Strut Brace?

Post by Jollyjoiner » Thu Jul 13, 2017 7:39 pm

How about two grunts and a trump ? that is normally enough :D
2009 35i DCT silver
SLT mapped to 365bhp :)

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