How do you know when its time to replace shocks???

[Superman]

Pretty much all old Bilsteins are going to pass the bounce test, as will many worn shocks. Noise going over turtles is more likely another (albeit related) component. For instance, there is typically a bearing between the tops of struts and the car chassis. So the strut can swivel. Noise going over bumps is often caused by these worn or broken 'tower bearings.'

Some of the above posts suggest how you tell bad shocks from good. They are perhaps the most high-impact suspension components in terms of performance. Going around corners with broken pavement at hwy speed will tell you right away. If the car feels unstable, you need shocks. If your shocks are in good shape, the broken pavement will not make you feel as if the car could loose control. Again, shocks perform the task of keeping the tires against the road. If the car seems to skip sideways at times (even very slightly, subtly), then replace your shocks with good ones. I can't overstress how important these things are. Going from old, poor shocks to fresh Bilsteins is perhaps the most dramatic improvement you can make to a car.

[dickster]

disconnected my shocks today to assess them.

i now know they're boges!

there was not much resistance in pulling the shaft back and forth out of the body of the shock. they have definitely seen better days..

richard