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Old 01-11-2010, 09:53 PM
The Critic The Critic is offline
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2010 Altima
2010 Altima
 
Join Date: Feb 2008
Location: Santa Cruz, CA
Posts: 4
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Springs do wear out over time, resulting in ride height issues. That is why companies such as Monroe have developed a pre-assembled "quick strut" to encourage replacement of the strut, spring, insulators, mount and bellows at the same time.

At 50k miles, it is very unlikely that your springs are worn-out. I would install new struts in the front and replace the strut mounts. According to the pictures, the front strut mounts have bearings, so it would be a good idea to replace the strut mount while you have the strut assembly disassembled. You would not want to have to do the same job twice if the strut mounts decided to fail a few months from now.

As for the alignment, I would always have a 4-wheel alignment performed after any suspension work. Even if the mounting holes on the new KYB struts are not elongated, the act of removing and reinstalling the bolts may cause slight changes to the camber that may ultimately affect the other settings.
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