not sure why you think its a bad motor, its extremely common to see them go over 150k, most over 200k pretty easy
problems come from neglect. neglect your cooling system and you well deystroy your headgaskets, you will pay out big $$ to fix it. the n* engine was redesigned in 2000, so your getting a second generation, and they've had over 10 years to work out the few little bugs it had, but this engine was designed to fix the problems with the 3.4dohc and quad 4. which is why it has a timming chain instead of belt. they've run this thing 3 quarts low of oil 90* on its side and it was NEVER starved of oil. partly because it has a very aggressive cylinder honning. this also makes it use (not burn) a some oil, which people seem to think is bad, but its good. its made to go to much higher rpms than it does. they even took this thing, drained all the coolant and drove it 50 miles in extremely hot temps, took it apart, and found nothing wrong. it even uses a system so you cant start a already started car, if it does overheat, it automaticaly shuts down 1/2 the cylinders, pumps air through them and switches between the 2 sets so you can drive home without deystroying the car.
its actually a very good engine, its just your average shade tree mechanic has its limits on it, like all other new engines.
modded & dropped 95 Aurora - SOLD for a 2001 Alero GLS - which is now being sold for a 93 SSEI WHICH got sold for a modded 98 regal GS!!!
98 regal GS:
3.4 / thrasher intake / SLP powerflodual exhaust / 3-2.5" downpipe w/ highflow cat / DHP 1.0 / afc 2.2 / gmpp handling package / other small things