i replaced mine on gen3 a while ago, get ready for your radiator to go soon! how many k's has your car done? i bought this water pump and have had no problemshttp://cgi.ebay.com.au/Holden-Commodore-VT-VX-VY-VZ-Gen3-V8-5-7-LS1-Water-Pump-/250799722280?pt=AU_Car_Parts_Accessories&hash=item3a64d40f28#ht_1629wt_907