Two problems related to radiator have been reported for the 1998 Mitsubishi Eclipse. The most recently reported issues are listed below.
40000 or more need a new head gastic and thats taking the engine apart, had a leak wasn't value gasitic and turned out to be head gasitic, when you drive car a 100 miles or so it loses oil, and loose about half a court of oil and burning smell, if you don't replace will loose more oil.
I was sold this car as a Mitsubishi, it has a Chrysler engine one step up from a neon. If I would have wanted a neon by Chrysler I would have purchased 2 for the price I paid for my Eclipse. The lower bearings went out. I have extended warranty. At 68,000 miles the radiator cracked, computer and alternater went out causing my car to overheat immediately and the engine wouldn't restart until it had cooled. Was hard to restart. It had slick 50 treatments 4 times during its life. It also has had 3 faulty clutches.