Originally posted by chbix:
should I replace it anyway or take the new one back? Anything else I should do down there. Will be replacing WP and thermostat.


I'd completely replace the coolant as well and make sure that you get a new (?o-ring/gasket?) for the t-stat. And if you have time, consider replacing the fluid in your mtx.

2000 Mystique LS Duratec 2.5L MTX