i had a 91 plymouth sundance with a 2.2L. after a while, they ALL start to knock, but thats no big deal. but the two most common problems they have is, alternator and heads. those are about the only two things you can expect to replace.
my sundance had 197,*** on the clock when it stopped turning, but the car kept going for probably another 2 years of teenage driving. then something happened to the head, im not really sure what it is, i replaced the head gasket and spent probably 2 days trying to time it and it still barely runs and when you cut it off lots of vapor comes out of the valve cover. i got tired of screwing with it, but still have it.
even on its last legs, i scored pretty good mileage (couldnt give you a number since the clock stopped ticking
) it knocked, burned a little oil, had serious build up on the valves (probably 50% of the valve was blocked, like a cone instead of a valve) and still just started up in the mornings.
thread hijack short,2.2/2.5 GOOD motors to the day they die. and the 2.2/2.5 turbos knock out some power even stock. i seem to recall something along the lines of 150-160hp more than the V6 models that came in some duster/shadows of the same year.