A head gaskets for the Z20 head can be found here :
http://www.superiorgasket.com/NISSAN.html
http://www.superiorgasket.com/HG-Z20-80.jpg
More information at: http://datsuntrucktech.homestead.com/Z20.html
http://datsuntrucktech.homestead.com/
These discussions are all relating to the L series engines. Is the head bolt
pattern the same as the U20 engines?
Tom
69 2000
Portland
Stan Chernoff wrote:
> David,
>
> The ports on the FIA head are in a different location.
>
> The pattern number for all of the original U-20 heads was "222". The
> replacement head made in the '80s was different. There was a fuel
> injection head made for some reason and even it had the 222 pattern number
> even though it had 10mm spark plug threads and no ribs over the combustion
> chamber near the spark plugs.
>
> There were some intake manifolds made for 50mm carbs that didn't have
> internal water passages and they may have been made for normal port
> locations and FIA locations also. The runners on these carbs were about
> 3/4" shorter.
>
> I don't know the pattern number on the Z20 engines but they are cross flow
> design.
>
> Stan
> =======
>
> At 09:30 PM 12/15/02 -0800, David & Candy Pina wrote:
> >I took what I thought was a U20 head, that is that it came off a U20
> >engine, to have it pressure checked and milled. I was told that it was
> >not a U20 head, but a Z20 head, made in China. There was a newer version
> >head called Z23 head that also was made in China, for the U20 block. I
> >noticed that my "Z20" head had bigger water passage openings, but
> >attributed that to the work of the shop that had done the porting,
> >polishing, and CCing of the head. Is this the FIA head? Can anyone give
> >me any other info or was I being misled?
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