I have a 2000 Nissan Sentra that has a noise in the front suspension, i went to a mechanic and he replace the front shock but after that and going in to a smal bump the strong noise appear again (is something similar to be with aout goood shocks)
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Re: Nissan Suspension noise
Sounds to me like your front control arm bushings are broken. have your mechanic check the bushings in rear of the control arm. the ones that are right by the 3 bolts in the control arm in rear. those bushings brake and cause play in the whole assembly, causing a rattle. Its a black round bushing about 2 inches in diamater. its most likely all separated. common problem. Have him look at your stabilizer bar links also.
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There are a lot of suspension points that can develop a squeak. Look at there: Front strut tower mounts, sway bar rubber mounts(if equipped). If you recently got new tires that may be a little larger than the originals, the tire may hit suspension parts when turning. They can rub against the inner fender well plastic parts as well. Best thing to do first is get a chassis lube. If that fails to resolve the problem, then look deeper into the problem by a good mechanic.
I have learned from experience. I replaced the air bag suspension ($75) on my 2000 Town Car and then learned that I had a problem with the compressor. Then decided to replace system with coil springs. Went on ebay and got a conversion kit (Air Ditcher) that included the shocks ($123) with free shipping. My mechanic replace the bags with the coils for $40. He said that with the shock replacement it would be $120 because the top of the rear shocks were hard to get to. So the whole job should have cost $163. No more worries!
Are you sure they are shocks and not struts? Have this car put on a rack and lifted off the pavement. Have all the suspension and steering parts inspected throughly. More than likely you will need to replace both the front shocks but it may be something else. An inspection by a pro will verify what is wrong. This can be very dangerous so do not put this off.
Improper installation, but most likely the noise you are hearing is a result of wear that happened before you had the shocks installed and the noise just became apparent when teh suspension was repaired.
I have serviced these in the past and it will probably be a combination of things. I just a few weeks ago fixed a 1999 with the same problems. Generally from past repairs, the electric pump has been working overtime to compensate for leaking rear air shocks. The best solution is to replace them both, not a cheap repair, the pump around 275.00 and each shock arount 275.00.
Just with every thing over time things fail, the rear shocks develop leaks over time/weather cracks, they are easy to check, soapy water will identify this as the problem. If you can get under it enough to spray around the bottom of the shocks when they are inflated. These systems are computer controlled and if you have the proper scanner you can check the system out for eletrical problems easily. My past experiences with these suspensions as almost always the shocks and pump.