[Amc-list] head bolt modification

[Mike Kindle <mike90066@xxxxxxxxxxx>]

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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