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Re: [Roadsters] Manifold Stud Questions

To: Datsun Roadster List <datsun-roadsters@autox.team.net>
Subject: Re: [Roadsters] Manifold Stud Questions
From: Eddie <eddietude@socal.rr.com>
Date: Sat, 28 Feb 2009 13:57:45 -0800
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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