I did all the seals on my Mitsu 3.0 (96 model but same thing) at about 150,000 miles. If you are going to tear the front down, take care of everything (unless you enjoy taking these apart ). I went as far as putting repair sleeves on the two camshafts and the crankshaft. I opted to do this after read John Blair's oil leak horror story which can be found here on Allpar. In addition to that, I replaced the rear camshaft plugs and the valve cover gaskets, as well as the oil pan gasket. When I had the tranny out, for replacement, I put a sleeve of the rear crank along with a new seal. I'm happy to say it is 100% tight at 214,000 miles and I have no drips on my concrete driveway. By everything, I mean timing belt and water pump (flush your cooling system thoroughly first).