...it was not the newly installed water pump that was leaking, it was the lower radiator hose, where it connects to pump. Leak was on bottom side of hose connection to pump, not seen until plastic shroud under rad/engine removed making inspection upwards possible.
Old pump had grooves/ridges on inlet connection, whereas new has smooth surface. Old hose had permanent indentations due to this which made it leak despite clamp being really tight. Anyway, the hose was probably original in this ´93, so was time to replace it anyway.

Hope this info might be useful


Gustafkalle