[Roadsters] Manifold Stud Questions

[Keith0alan at aol.com]

The heads can be and often were interchanged.
 
keith
 
 
In a message dated 2/28/2009 1:58:40 P.M. Pacific Standard Time,  
eddietude at socal.rr.com writes:

Hey  everyone,

Thanks for all the info.

So, it seems that pre-1967.5  motors were SAE, and post 1967.5 were 
metric.  Funny thing is, this  engine is in a 1966.

Ok, so the next question is this:

Can a  METRIC head be used on an SAE block?  Or were the blocks all the  
same?  (except of course the R-16/ H20 differences)

If I can  use the head, I'll save it.  Otherwise, I'll get it cleaned up 
to  make sure it's good and then I'll sell it.

Eddie



Eddie  wrote:
> Hi guys,
>
> Found something that strikes me as  weird, and wanted to know what the 
> deal is.
>
> I've got  3 engine heads for a 1600 Datsun Roadster.  (Have one car, a 
>  parts car, and part of a 3rd parts car)
>
> 1 is a cast iron head,  (my roadster had a forklift motor in it when I 
> bought it.  Yup,  with the forklift cam, oil pan, everything...some 
> bonehead literally  dropped a forklift motor in the car without making 
> ANY changes at all  to it.  Duh.)
>
> 2 are Aluminum heads.
>
> The  cast iron head uses 5/16 x 18 studs for the exhaust/intake  manifolds
>
> ONE of my aluminum heads uses the same size English  bolts.
>
> my OTHER aluminum head takes 8mm x 1.25  studs.
>
> Is this normal?  Were some of these metric while  others were English?
>
> Also, I took the water pump off of my  spare car, and found a 1" thick 
> aluminum "spacer block/plate" between  the pump and the engine.  My 
> other 2 motors did NOT have that,  and the book doesn't show one.
>
> What's the story on  that?
>
> My questions are more out of curiosity than anything  else, but I would 
> like to know what's up with this  stuff...
>
> Thanks.
>
> Eddie
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