Re: [Amc-list] head bolt modification

[JOE FULTON <piper_pa20@xxxxxxxxxxx>]

Mike,

I did that modification to the 199 on my 66 Rambler. 
I had the machine shop reduce the bolt diameter in
accordance with the drawing in the service bulletin
(and on Matt's site).  I thought there would be less
chance of stress risers if the machine shop did it
rather than doing in at home on a bench grinder.

You might want to consider this.

Joe Fulton

--- Mike Kindle <mike90066@xxxxxxxxxxx> wrote:

> 
>   
> I've recently raised my standards as to what kind of
> oil leaks I'll tolerate, so I'm putting a new valve
> cover gasket on the American.  So I'm also taking
> the opportunity to do the head bolt modification for
> improved oiling in the 232 as described on Matt's
> mattsoldcars.com website.  It had not been done
> before and though the car had sat for a couple days
> it still seemed pretty dry in the valve train when I
> got the cover off, so I think it needs it. 
> Basically you pull the third from the rear passenger
> side head bolt and the second from the rear rocker
> shaft bolt.  If you look closely at that second
> rocker shaft pedestal, the casting is different, as
> it contains the passage for oil to make it's way up
> to the rocker shaft.  The aforementioned head bolt
> also passes through that same channel further down
> reducing it to an easily clogged size.    The
> "modification" includes cleaning out the pedestal
> passage with a wire and a blast of air, and grinding
> down part of the head bolt t
>  o provide more room for oil to pass.  I'm going
> easy on narrowing the bolt as I fear snapping it off
> when I re-torque it to 80 ft-lbs.  We'll know more
> tomorrow.
> 
>
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