[Shotimes] :-(exhaust troubles)

[James White]

The AWA's Nissan truck is much like our SHOs.  Aluminum heads, Iron
manifolds and rusty steel bolts.

Trying to get the Y-pipe off of this Nissan, I had a lot of problems like
others have had with our SHOs.  Y-pipe to manifold studs busted off, even
with a lot of heat, so I thought that I would remove the manifold.  Bad
idea!  One stud on each side was already broken off and just rattling around
in the heat shield and of course I broke another.  Couldn't hear the leak
past the manifold gasket because the y-pipe was shot.

Now I am stuck.  The new y-pipe is on, but both manifolds leak at the heads
due to the broken bolts.  Access is tight, but I think that I could get a
drill and an easi-out in there, but I don't know if that would work.  Would
like to use some heat, but how much could I heat the area around the broken
stud without damaging the aluminum head?

Or should I just yank the heads off and get them to a good machine shop?
But that would entail tearing into the front of the motor to get the timing
chain off.

Was wondering if anybody has broken off manifold studs and what you did to
repair the problem.

Jim White - greensho@crown.net
Valparaiso, Indiana
'93  5 SPEED   275k few mods
'95  5 SPEED   226k lots of mods
"double clutch"  it's good for both you and your SHO

----- Original Message -----
From: "Mark Nunnally" <manunnal@netheaven.com>
To: "shotimes" <shotimes@autox.team.net>
Sent: Friday, November 15, 2002 4:09 PM
Subject: Re: [Shotimes] :-(


> > IMHO, it all depends on how easy the y-pipe comes off. If I didn't have
> the
> > 1.5 days of issues with the y-pipe and broken studs, the rest of the job
> > would have been easy.
>
>     Did a clutch last week, 2 broken rear manifold studs (one was broke
when
> it came here).  Spent 2 hrs torching them out, got one out in 1 piece, the
> other had to drill out, and re-tap.  What a pain.  Even with the subframe
> off and axles out of the way, still hard to work in there with any tool to
> get good leverage.  The rear manifold is easier to get off than the front,
> so it's worth it at times to just pull it off and work on it with it on
the
> bench.
>
> mark
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