Re: engine studs

[Chuck <ka6uup@domain.elided>]

TJ,
The answer is yes, they can be removed, but, you will have to drill out
and Helicoil the hole to reinstall the studs as removing will screw up
the threads.
I had to do this to my '71 1750. I noticed that I had one stud which
didn't want to torque correctly.
Eventually it popped the top out of the acorn nut! Upon measuring it I
discovered it was pulling out of the block. It was either fix it or
scrap the block.
The only thing to watch is you must use the head or a head gasket, (the
head is better) as a guide
to drill and tap the stud hole.
First I made an extension rod with a hole and set screw in one end to
hold the tap drill. This should be done on a lathe if possible. I placed
the extension with the tap drill in it through the proper hole in the
head (from the bottom) and then set the head down over the studs and
drilled out the hole. 
I then made an extension out of aluminum rod to hold the tap. The rod
should be about the same diameter as the head stud. I drilled a hole in
the end of the rod slightly smaller than the diagonal of the square end
of the tap and then broached the tap into to the hole. This should be
done on a lathe if possible. I then drilled, tapped and installed a set
screw. I placed the extension with the tap drill in it through the
proper hole in the head (from the bottom) and then set the head down
over the studs and drilled out the hole. I then installed the Helicoil
and then the stud. I used lots of sealer on the threads to prevent water
from getting into the threads.
Good Luck,
Chuck
ka6uup@domain.elided
 


> 
> Date: Tue, 17 Dec 2002 14:01:23 -0800
> From: "TJ Noto" <tj@domain.elided>
> Subject: Engine studs
> 
> I posted the message below to the list last week and didn't receive so
> much as an "I have no freakin idea, Noto" so I'm wondering if it made
> it.
> 
> Apologies if this is a repost.......but surely someone out there has
> some ideas...........
> 
> TJ
> 
> So what is the common philosophy with the studs in 1600cc engine blocks?
> Since they are constantly bathed in coolant they are of course going to
> corrode.  Previous experience with big 6 cylinder engines from England
> (not mentioning any names) dictate that new/replacement studs are often
> a wise investment during a rebuild.  The last thing you want is to have
> studs stretching when you go to torque the head.
> 
> Are Alfa studs known for this?  Is replacing them recommended or not?
> Are stainless studs available if so?
> 
> Anyone had any experience with this?
> 
> TJ in Northern California
> "who has just now had non-generator generated power for the first time
> this weekend".
> 
> TJ Noto         AFM #134        Cowpoke Racing-"Friends in Slow Places"
> http://www.cowpokeracing.com
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> 
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