Re: IML: Problem with exhaust manifold studs...
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Re: IML: Problem with exhaust manifold studs...



Hi Benjamin,

THanks for your advise!,

But  I need to know a little more :)
What is a left hand drill bit set??
I suppose the spiral on the dril goes counterclock wise then, but what are the benefits then?

Ofcourse pulling the head is the safest way, but I don't like to pull the head of an otherwise sound engine..

BTW, what is an E-Z ???

Yes, the job is making me a little nervous but if I screw it up I can always pull the head and bring it to the machine shop for extracting the studs.

But I think I should try it myself, don't you think?

Thanks,

Robert
----- Original Message ----- From: "Benjamin Breyer" <bmb2102@xxxxxxxxxxxx>
To: <mailing-list@xxxxxxxxxxxxxxxx>
Sent: Thursday, May 10, 2007 5:25 PM
Subject: Re: IML: Problem with exhaust manifold studs...




If you reinstall the manifold with four bolts, use two gaskets.

Pulling the head is the safest way to deal with this problem. If the
job makes you nervous, let a machine shop extract the studs. It
isn't that difficult, however. Use a *good* drill bit set, starting
small, and gradually step up the bit size until little more than the
stud threads remain. Then use an E-Z out, need nose pliers, or
something else. If you measure the depth of the stud hole, you
needn't fear drilling too deep. You will probably feel the bit
bottom out before you begin drilling into the head anyway. I've
never used them, but a left-hand drill bit set might be a good way
to go.


Quoting Rob van der Es <r.vdes@xxxxxxxxxxxxxxx>:

Hi Paul and the rest of the IML gang,

I need some expert advise with regard to the exhaust manifold
studs of my
1960  Imperial.
For 10 days ago I broke the exhaust manifold flange of the left
manifold...
I noticed a a roadbump too late and was hitting it with too much
speed,
since the whole exhaust system is pretty rigid the impact was
given
directly to the cast iron manifold..

With the restult that the flange has broken..
I found myself a reputable cast iron welder that has done the job
many
times before so with a little luck I will have my manifold back
early next
week.

But now for the real problem: when taking the manifold off two
studs were
broken....
Despite of several overnight soaking sessions with penetrating
oil!

The number two stud (counting from the radiator) and the last
stud are
broken and almost flush with the head.
Ofcourse I can try if the 4 remaining studs and bolts will secure
the
manifold but  I simply don't like the idea.

On the otherhand, I either don't like the idea of taking the head
off.
And at least the last stud is very difficult (or not..)
accessible with
the head in place.
So maybe I should aim for the second stud to come out.

Both studs are almost flushed with the head surface (slightly
below
actually).
Is there a safe way to get them out?
Or should I try to secure the manifold with the 4 remaining nuts
and see
what happens?

If this doesn't work out, how do I remove those broken studs
then?
And where can I buy new studs for my engine?

Ofcourse I can try to drill out the number two studs since I
think I can
access this one from the left front wheel area (with the left
front wheel
removed ofcourse).

But what if I screw up and the studs doesn't come out, since
these studs
are in the cooling fluid area it is important that I don't cause
any
leakage.
If I break a drill for e.g. while it is just through the center
of the
stud (if I am lucky..) and the broken part gets stuck, cooling
fluid will
escape then!!

So should I go for the 4 studs fasting method first?

Any words of whisdom??

Thanks,

Robert
1960 Imperial Crown




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