I always have used Airtex brand waterpumps. They have a lifetime guaranty. Be sure that you don't overtighten the fan belt and use the proper ratio of coolant to water for your area. I used to use rebuilt/cheap new pumps on my '68 AMX, only to have them leak in 6 months to a year. I installed a new Airtex pump back in '84, no leaks since! Hope this helps, good luck.