Hi guys I just both a whole set of Bilstein struts/shocks & springs for my E36 94 -318i. I'm just curious if my new struts/shocks are good or bad. When I shake or turn them upside down I can hear the oil inside. It's like hearing oil inside a bottle when you shake it. I'm just wondering if this is normal. I tested all of the shocks/struts and I can hear the oil inside all of them when turn them upside down. Also are you suppose to be able to push the piston rod of the strut/shock inside the tube with bare hand? Please check this link from bilstein: http://www.bilstein.com/BilsteinAppGuide303.pdf
AND CHECK PAGE 29. they mentioned something about "Bubbling noises inside — when shock is inverted, compressed and released. (Oil and gas have mixed.) need replacement" I've consulted the seller and I was told that it should be ok. But I have a bad feeling about this. I'm not familiar with shocks/struts but at least I trust my instinct. Please kindly give your output. Thanks guys.