Why? This is really puzzling me...
if you need a replacement pump then:
Waterpump Jan 1991 - Dec 1998 21010-52F01
Waterpump pulley Jan 1991 - Dec 1998 21051-65F00
http://forums.nicoclub.com/zerothread?id=59345&page=2
Water pump
21010-52F00 (SR20 all)
http://forums.nicoclub.com/zerothread/59345