Thomas,
I am surprised you missed this one. The very early cars had insulators that
were rubber and metal (like a motor mount or solex insulators.) They bolted
to the intake in the opposite holes from where the carb holes are. That is
why they use short studs. From what I understand, they are tough to obtain,
so the PO most likely replaced them with the phenolic spacers and just never
removed the original studs.
Sid
>From: Thomas Walter <twalter@austin.rr.com>
>Reply-To: Thomas Walter <twalter@austin.rr.com>
>To: Geegc@aol.com
>CC: datsun-roadsters@autox.team.net
>Subject: Re: Studs on intake manifold Q
>Date: Thu, 14 Feb 2002 01:09:47 -0600
>
>Odd indeed.
>
>The 1600 carbs are held on by two studs
>
>The 2000 carbs are held on by four studs.
>
>Does it look like someone tried to "port" the manifold for the
>bigger carbs at one time? Still wouldn't explain the difference
>in length.
>
>Yep, if you can't see the extra studs... time to steam clean
>that engine!
>
>Tom
>
>
>Geegc@aol.com wrote:
>
> > As I am putting everything back together (the never ending story) on my
>1966
> > 1600 I noticed that each of the carb sides of the intake manifold has 4
>3/8
> > inch studs coming out, two long ones and two short ones. The long ones
>go
> > through the insulator blocks and hook up with the carbs, but as best as
>I can
> > tell the short ones don't connect to anything and exist only to attract
>dirt.
> > Anyone have any idea what they were for?
> >
> > They are not on the later carbs manifold I have.
> >
> > Gary C
> >
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