I have a 90 sentra with 202K miles on it, I'm very thorough with the maintenance and repairs, recently I've noticed that when going over bumps at slow speeds I can hear a clunking noise that seems to be coming fom the front end, both sides, sometimes I hear the noise with out going over bumps but when turning the wheel (manual steering), I've jacked the car up with the suspension hanging (jack under sill plate and with the jack under the control arm) and checked everything I could think to check under the car and nothing is loose or has play, I thought the pulsar front sway bar may be hitting something but it is clear of everything, than I noticed the bumper was moving around and the metal plate under the bumper had room to move, of course the small 10mm bolts are rusted so bad they just snap so I screwed like 9 self tapping screws thru the metal strip into the metal under the bumper, still have the noise. The only other thing I noticed is the radiator lower bushings may be worn out as the radiator can move up and down slightly. going to order the 2 bushings and replace them soon. Anyone think of anything else I can check?? Thanks