I removed the backing plate of both pumps.
On both the water passage, channel is drilled, same size also.
Defenitly just the backing plate is different!
Chris - The Belgian Roadster
http://albums.photopoint.com/j/AlbumIndex?u=1424148&a=10670695&f=0
-----UrsprC<ngliche Nachricht-----
Von: "datsunmike" <datsunmike@nyc.rr.com>
An: "The Belgian Roadster" <chriss@euregio.net>; "Steve Allen"
<dumpdude@pon.net>; <datsun-roadsters@autox.team.net>
Gesendet: Donnerstag, 7. Juni 2001 01:55
Betreff: Re: H20 Water pump conversion
> But what's behind the blocked off hole? Is the water passage still
there?
>
> When I received the H20 engine the waterpump had both passages.
>
> Mike
>
> ----- Original Message -----
> From: "The Belgian Roadster" <chriss@euregio.net>
> To: "Steve Allen" <dumpdude@pon.net>;
<datsun-roadsters@autox.team.net>
> Sent: Wednesday, June 06, 2001 12:47 PM
> Subject: H20 Water pump conversion
>
>
> > Hi all,
> > As told, I finally had time to compare both water pumps.
> > Click the link to see by yourself the differences.
> > http://www.schauff.be/water_pump.htm
> > Right one, with the bolt close to the hose connexion is
21010-20H25
> > former partnumber of
> > 21010-78200...78202...78203...78225...78226...J5125 these normaly
fits
> > the R16 engine(This is the number from www.carparts.com)
> > This waterpump was also used on Datsun 230 with H20 engine.
> > Left one, with the pipe is H20-Urvan build for high rmp partnumber
> > 21010-R9025....R9026
> > The distances between the bolts are the same for both pumps.
> > Main difference is on the backing plate.
> > As you can see H20-Urvan has only one hole, more like U20, but
does
> > not fit U20 because of bolt pattern.
> > Second difference is H20-Urvan is build for use with a
visco-clutch
> > vent (that's why it has studs in front).
> >
> > -----Urspr|ngliche Nachricht-----
> > Von: "Steve Allen" <dumpdude@pon.net>
> > An: "The Belgian Roadster" <chriss@euregio.net>
> > Gesendet: Dienstag, 5. Juni 2001 05:43
> > Betreff: Re: H20 Water pump
> >
> >
> > > Chris,
> > >
> > > Could you provide me with the part number for the H20-Urvan
water
> > pump? I stroked my R16 to a 2 liter using the H20 crank. It would
be
> > worth it to see if
> > > the water pump would bolt up to my R16. OEM pumps cost around
> > $120.00 USD for th R16. Thanks.
> > >
> > > Steve
> > > 67.5 stroked 2 liter
> > > 66 x 2
> > > RP, CA
> > > 311 Skid Marks
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