Re: [Amc-list] 195.6 OHV head bolt dimensions

[Tom Jennings <tomj@xxxxxxx>]

I looked at the 195.6OHV head on my way out the door this AM.

5 short bolts
4 medium bolts (two are stud-heads)
6 long bolts


SHORT are under the valve cover on the distributor side.

MEDIUM and LONG are all the others; the only difference is
the aluminum intake valley cover is about .5" high and the LONG
bolts go there. The four MEDIUMS are on the ends where the valley
cover isn't. Chances are the LONG bolts would work over there --
easily checked (drop one in the hole without a washer and see
if it bottoms).

The block is milled for 5 short and all the rest long. It's
very simple.

The parts catalog for 63 will easily solve this -- see if it
specs 5 short, two studs, 8 longs; or 6 long + 2 medium. My
guess is, AMC simply drilled/tapped those holes an extra 1/4"
- 1/2" to simplify stock.


All those oddball bolts in my donor head are from decades of
use/abuse/repairs/etc.




On Tue, 1 Apr 2008, Frank Swygert wrote:

> Great! The 5 x 3-5/8" definitely go under the valve cover, and the two studs
> go on each end of the left side (front and back, not through the intake
> plate). I'm pretty sure the 6 that go through the intake plate are 5". The
> 4.5" *might* have me stumped! It's been a while since I pulled a 196 head, but
> I *think* the front and rear bolts on the right side (under valve cover) are
> longer than the center 5. If so they should be the 4-1/2" bolts. Easy to check
> -- if the area where the bolt goes through is taller than the center 5 holes
> then it needs to be longer, and I'm pretty sure it is -- provided memory
> serves me. No clear photo in the TSM. That just leaves the odd 4-1/4" bolt
> "hanging" -- I bet it was a substitute for a missing 5". I'm 99% sure the 6
> through the intake are the same length and the 5 in the center under the valve
> cover are the same length.
>
> Tom Jennings wrote:
> > OK I screwed up royally on the bolts. Thanks for the poke, Frank!
> >
> > A month or so ago I pulled a head from a 1963 classic 195.6. The head
> > had definitely been off and rebuilt once, so it may not be as AMC
> > intended. I saved all the bolts and everything. Here's what I have:
> >
> > 1 - 4-1/4" long
> > 4 - 5"
> > 2 - 4-1/2"
> > 2 - 4-1/2" stud
> > 5 - 3-5/8" (could be 3-1/2, greasy bolt clean fingers didn't pull washer
> > off)
> >
> > otherwise as stated (head, thread, etc). The threaded portion
> > of the short bolts is shorter.
> >
> > I know the motor in my AMerican didn't have this hardware store
> > assortment. There was long, and short.
> >
> > 45 years is a long time....
> >
> >
> >
> >
> >
> > On Tue, 1 Apr 2008, Frank Swygert wrote:
> >
> >
> > > Tom, did you just measure the bolt from out of the valve cover, the one
> > > that
> > > holds the intake down? 5" below the head sounds right for those, but I
> > > think
> > > the ones under the valve cover are the short ones (3-3/4" below head to
> > > end) I
> > > mentioned in my previous post. I have a couple head bolts here that I'm
> > > 90%
> > > sure came from a 196, under the valve cover, but I might be mistaken. I'm
> > > 99%
> > > sure there are two different lengths though. I was thinking the longer
> > > ones
> > > were at least 4-1/2"-4-3/4" but wasn't sure, 5" sounds about right for
> > > them
> > > (5" from bottom of head to end, would be roughly 5-1/2" overall from end
> > > to
> > > end -- the short ones would be about 4-1/4" total).
> > > 7/16"x14 tpi is standard US coarse threads -- easy to find! Wrench size
> > > really
> > > doesn't matter, and washers can be used instead of the oversize shoulders.
> > > (just here for Dave's info and your comment if you disagree).
> > > -------------
> > > Date: Mon, 31 Mar 2008 21:39:53 -0700 (PDT)
> > > From: Tom Jennings <tomj@xxxxxxx>
> > >
> > > On Mon, 31 Mar 2008, d stohler wrote:
> > >
> > > > so, does anyone know off top of their head the size
> > > > bolt for the 196 head? my casper is sitting 45 miles
> > > > the WRONG way, and i am going to town in the morning.
> > > >
> > > OK Dave, you owe me a beer/coffee/poison of my choice:  :-)
> > > grade 8
> > > 5/8" wrench size, plain hex head
> > > 5" overall (under head to end)
> > > 7/16"-14 thread, .390" shaft
> > > threaded portion, only last 1-1/8"
> > > oversized shoulder, .434", top 1/2" of shaft under head
> > >
> > >
> > >
> >
> >
>
>
>
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