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edge
Nürburgring


Joined: 25 Mar 2008
Posts: 413
Location: Devon


PostPosted: Thu Jun 29, 2017 7:56 pm    Post subject: Centrelock wheel nut Reply with quote

Can anyone tell me the reason for backing off the centrelock nut by 1/6th of a turn once you reach the correct torque , then you re-tighten again . Torque loosen the torque again seems strange when you think how tight the nut has to be torqued up.
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Frenchmeister
Suzuka


Joined: 24 Feb 2014
Posts: 1183
Location: Beautiful Cumbria.

2004 Porsche 997 Carrera 2S

PostPosted: Thu Jun 29, 2017 9:32 pm    Post subject: Reply with quote

I cannot think of an engineering reason possibly a double check, after all it will keep the wheel where it should be. Question
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edge
Nürburgring


Joined: 25 Mar 2008
Posts: 413
Location: Devon


PostPosted: Thu Jun 29, 2017 11:27 pm    Post subject: Reply with quote

I torque the nut up to 600nm as per the latest Porsche instructions , mark the wheel where the iine on the nut is and back it off to the second line then re- tighten . The torque wrench clicks bang on the first mark I made so it seems to be a waste of time and a pain when you use a torque multiplier like I do.
I will follow the Porsche instruction but would like to understand why.
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