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

[Frank Swygert <farna@xxxxxxx>]

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
>>
>>
>>     
>
>   


-- 
Frank Swygert
Publisher, "American Motors Cars" 
Magazine (AMC)
For all AMC enthusiasts
http://farna.home.att.net/AMC.html
(free download available!)

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