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2003-2009 Nissan 350Z

Need help with bolt size

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Old Aug 14, 2018 | 05:17 PM
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Default Need help with bolt size

Can anyone give me the specs to the rear lower shock bolt? I need to find a drill bit in the same size, and cannot find the specs. Thanks!

https://conceptzperformance.com/niss...0a_p_12300.php
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Old Aug 15, 2018 | 07:58 AM
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The bolt is an M12 x 1.25 x 70mm (plus the tapered bit, so a custom 75mm I guess?).

What are you trying to do?
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Old Aug 15, 2018 | 09:28 AM
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I’ll bet that it seized in the bushing from wha5 he is asking.
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Old Aug 15, 2018 | 09:33 AM
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In that case,

hammer + punch =
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Old Aug 21, 2018 | 05:45 AM
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Redrilled the lower shock forks to get the rear lower. I am fully stripped out in the rear, and on my coilover setup, my rake is too much even when fully bottomed out in the rear.

And no, I cannot run a softer spring in the rear
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Old Aug 21, 2018 | 07:29 AM
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Ahh, that makes sense. Bummer! I've used heli-coils to repair threads before, but never on anything that large..

Edit: I misunderstood the intent of the re-drilling. Are you also planning to weld a nut onto the fork in the new spot? If not.. there's a reason Nissan didn't want the both the bolt and nut to rotate relative to the shock body. Sounds like it'd be a lot safer (though more expensive) to order a new spring with the same rate and a shorter free length.

Good luck OP.

Last edited by SpartaEvolution; Aug 21, 2018 at 12:38 PM.
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Old Aug 21, 2018 | 12:22 PM
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Helper spring, that is how it is properly done
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Old Aug 21, 2018 | 04:43 PM
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Originally Posted by SpartaEvolution
Ahh, that makes sense. Bummer! I've used heli-coils to repair threads before, but never on anything that large..

Edit: I misunderstood the intent of the re-drilling. Are you also planning to weld a nut onto the fork in the new spot? If not.. there's a reason Nissan didn't want the both the bolt and nut to rotate relative to the shock body. Sounds like it'd be a lot safer (though more expensive) to order a new spring with the same rate and a shorter free length.

Good luck OP.
These are true coilovers from Buddy Club. The fork never came with a nut welded onto it.
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Old Aug 23, 2018 | 05:42 AM
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Bet this didn't end well.
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Old Aug 23, 2018 | 05:52 AM
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Originally Posted by dboyzalter
Bet this didn't end well.
Whys that?

I just wanted to get the rear lower to reduce my rake. We corner balanced the car this week and got the cross weights 50/50, rear is still a bit lighter but not to much. Rerouting battery to the rear and will be running to some aero to help get some weight over the rear.

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Old Aug 23, 2018 | 08:15 AM
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Originally Posted by bcoffin23
These are true coilovers from Buddy Club. The fork never came with a nut welded onto it.
Huh, I figured all aftermarket shocks did, but now that I'm looking into it it's ~half and half (assuming the pics I'm finding are actual G/Z products vs representative).

Bilstein does, Nismo does, BC does, RS-R does, Koni does not, Ohlins does not, Apexi does not, KW does not.

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Old Aug 23, 2018 | 09:35 AM
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I guess your rear shock is much different than mine, I don't have any room for anything like that.
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Old Aug 23, 2018 | 09:37 AM
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Originally Posted by dboyzalter
I guess your rear shock is much different than mine, I don't have any room for anything like that.
I'm running true coilover. I drilled the lower fork hole 1-inch higher on the fork. Fit right in.
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