Well, I just went out to take a look at it again, and there is no sign of a
water choke block-off (and no air injector holes for that matter), so we are
looking at an early style head. It figures that the PO (of this engine)
ordered a pre-smog-spec motor -- it only makes sense (it just didn't pass
muster with the DMV).
If this means anything to anybody, the markings on top surface of the head
are (from rear):
PAT NO
585384
(cast)
16N9 (maybe "H")
5 (very large)
(cast)
12H4736
(stamped; the 6 is very out of alignment)
--
Max Heim
'66 MGB GHN3L76149
If you're near Mountain View, CA,
it's the primer red one with chrome wires
on 11/17/08 12:05 PM, Max Heim at max_heim@sbcglobal.net wrote:
> That is a great tip. Not the sort of thing one would be looking for. Thanks
> again.
>
> The "Original MGB" book has a table of Gold Seal engine numbers. The numeric
> format is similar to mine, but my number is outside the range cited. I had
> supposed that that might just reflect that it is more recent than the
> publication date.
>
> Actually, looking at the table again, the last three lines show the prefixes
> BHM 1105 and BHM 1111 -- mine would slot in between those (1109). At any
> rate, it looks as if it would be an 18V spec engine. I am sure this one
> would be a high compression version, as I have always had to run premium
> fuel (it was sourced from a 1974 MGB-GT, which was parted despite the new
> engine when it was determined it could not pass smog in CA). Possibly an
> 18V-846-F-H?
>
> When I get the head off and look at the valve sizes it should help clear
> this up. It's funny, the bottom end has been opened up but I've never had
> the head off
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