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conedodger

Fasteners for L30 intake/exhaust

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    Are you guys using anything special for intake/exhaust fasteners? I’m using a Datsun Motorsport header that has been on my car since the 70’s and a non-EGR L28 intake that has been extrudehone’d. The EFI will be controlled by a Haltech Elite 2500. 
    I was going to just order some new fasteners from the ZStore but I thought I’d ask here first...

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    I run OEM studs . I’ve used the SS stud kit from ZCD - I believe - also . I have also used there copper flanged nuts - and they do stay tight . Tight enough to bring the stud out sometimes . But no washers to fiddle with . 

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    On 7/9/2020 at 1:11 AM, conedodger said:

    Steve, I have a new set of OEM studs in the E31 head. Help me though, ZCD?

    Z car depot is correct . So you have the studs and you just need nuts . I like the copper ones ZCD sells . Or some good ole nut and washers 

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    Posted (edited)
    22 minutes ago, heyitsrama said:

    Do you not need to run lock washers with those copper nuts?

    No, they are deformed so that installation causes them to lock on like a stover nut. Adding a lock washer would not be harmful if you would like but it would defeat the purpose of that nice large flange I think.

    Edited by zKars

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    I just used red threadlock on my copper nuts - it hurt, but after a while they recovered - and the ones on the header have never come unstuck either. In fact taking one off to replace the washer with a different one, resulted in the nut pulling the stud out with it!!

     

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    I agree with the blue (as opposed) to the red lock-tite. Belmetric is my go-to place but then they're located 15 minutes from my house. Great people.

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    I went with the red for its high heat capabilities but I have to say, when they say it’s meant for breaking with power tools, they really mean it!!! I’m currently using it on my suspension bolts (took the entire rear - inc fuel tank - and front axles off over lock down).

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    One downside to using thread locker is that you can't retorque or tighten up the fastener once you use it.  So if your exhaust gasket compresses a bit and you'd like to snug up the nuts, too bad.  

    And, I don't think that Nissan used any threadlocker on those parts.  I don't think that any manufacturers use them today on those parts either.

    Just an alternate view.  Also, if you don't use it on the studs in to the head then those can loosen up anyway.  But if you do use threadlocker on the studs then you can rip the aluminum threads out of the head.  Then, ultimately, when you do eventually remove the exhaust manifold, you'll be removing the studs from the head but under tension.  Which is not good for the head threads.

    Just seems like one of those keep it simple areas.

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