| I've had 2x water-pumps fail within a year on a 1990 NA 300zx which travels a mere 500k between these failures. The waterpumps were purchased from a USA vendor under the assumption/specification that they be Nissan OEM parts. How likly is this being pure coincidence/bad luck that these have failed in quick sucession? Both have been installed to spec/tightness on a full UR pulley system. Baffled as I've had no trouble with the installation of such parts on my other Zed. Wondering if Ive been given cheap branded waterpump, or how to identify genuine Nissan. Also eager to hear any other not so obvious issues which could participate in water pump damage.
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