Possibly. Only add sealant if it is called for by the manufacture.
below the exhaust pipe, look like a a rectagular shape, remove the two bolts, clean then use RTV high temp selant.
remove rocker cover, remove all drive belts, remove bottom balancer, remove timing cover, line up timing marks on the cams, remove timing belt and tensioners.. you should be able to get at the waterpump , remove it, clean up the face and fit ur new pump + gasket with sum selant goo (i like ultra blue), pop it all back together. if your mechanically inclined its and easy job.. if not.. pay for it to be done.