turbo > cat bolts?

[thejimrose]

anyone know of a good 'idiot's guide to fastener grades and markings' ?

thanx
jim

On 3/20/07, Mark R <speedracer.mark at gmail.com> wrote:
>
> I agree.  Regular stainless hardware in the stores is 304 series and is
> roughly equivalent to grade 5 steel as far as strength.  For exhaust
> installtion, this is sufficient.  The key is proper installation, gasketing,
> and torque.  Personally, I'd use 316 series due to the heat.  The added
> mechanical properties is a nice bonus, but I use 316 due to it's higher
> resitance to corrosion in the high heat (and resulting condensation)
> situation.
>
> ARP would likely have appropriate hardware, but that's overkill, I'm sure.
>
> Mark Rosenkrantz
>
>
> On 3/20/07, Ameer Antar <antar at comcast.net> wrote:
> >
> > I've used 316 (A4) grade stainless hardware and they've held up on the
> > turbo
> > and wastegate just fine. I used regular old 304 stainless (A2) on the
> > cat. No
> > problems at all. Just make sure you don't use an impact wrench on these
> > things.
> > Is your cat directly bolted to the turbo? Strange setup, but if it is,
> > definitely go with the A4 grade; these are supposed to retain their
> > strength in
> > high-heat situations. If you need any I just may have some left over.
> >
> >
> > -Ameer
> >
> >
> > -------------------- Original Message --------------------
> >
> > > Message: 5
> > > Date: Mon, 19 Mar 2007 22:36:28 -0700
> > > From: thejimrose [thejimrose at gmail.com]
> > > Subject: turbo > cat bolts?
> > > To: quattro at audifans.com
> > > Message-ID:
> > >     [298352bd0703192236r52a5da58u51053784b8012d63 at mail.gmail.com]
> > > Content-Type: text/plain; charset=ISO-8859-1; format=flowed
> > >
> > > anyone have thoughts on what to use for the bolts to attach my turbo
> > to my
> > > shiny new high flow cat? the stock stuff is grade 8.8 black oxide.
> > pretty
> > > standard. i'd like to step to stainless but it seems SS bolts are a
> > little
> > > softer [ive broken a few].
> > >
> > > i got some SS nuts, bolts + washers from the local ace, but i NEVER
> > want to
> > > do this job again so if there's a best grade or hardware to use, i'm
> > al over
> > > it.
> > >
> > > thanks
> > > jim
> > >
> > >
> > > ------------------------------
> > >
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> >
>
>


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