MY350Z.COM - Nissan 350Z and 370Z Forum Discussion

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-   2003-2009 Nissan 350Z (https://my350z.com/forum/2003-2009-nissan-350z-2/)
-   -   Need help with bolt size (https://my350z.com/forum/2003-2009-nissan-350z/620171-need-help-with-bolt-size.html)

bcoffin23 08-14-2018 05:17 PM

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

SpartaEvolution 08-15-2018 07:58 AM

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?

terrasmak 08-15-2018 09:28 AM

I’ll bet that it seized in the bushing from wha5 he is asking.

SpartaEvolution 08-15-2018 09:33 AM

In that case,

hammer + punch =
https://cimg5.ibsrv.net/gimg/my350z....91177d8305.gif

bcoffin23 08-21-2018 05:45 AM

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 :)

SpartaEvolution 08-21-2018 07:29 AM

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.

terrasmak 08-21-2018 12:22 PM

Helper spring, that is how it is properly done

bcoffin23 08-21-2018 04:43 PM


Originally Posted by SpartaEvolution (Post 10968895)
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.

dboyzalter 08-23-2018 05:42 AM

Bet this didn't end well.

bcoffin23 08-23-2018 05:52 AM


Originally Posted by dboyzalter (Post 10969216)
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.


SpartaEvolution 08-23-2018 08:15 AM


Originally Posted by bcoffin23 (Post 10968970)
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.

https://cimg1.ibsrv.net/gimg/my350z....9356deed60.jpg

dboyzalter 08-23-2018 09:35 AM

I guess your rear shock is much different than mine, I don't have any room for anything like that.

bcoffin23 08-23-2018 09:37 AM


Originally Posted by dboyzalter (Post 10969255)
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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