Hi,
There really isn't a way to grease a strut. If you are getting a clunking sound when you hit bumps, chances are either the strut is blown or the strut plate (mount) is bad. Also, a broken coil spring can cause a noise.
First, check for leaks or anything that appears cracked, broken, or distorted. If nothing appears bad and the vehicle doesn't bounce excessively, then suspect the strut plate/mount needs replaced.
I attached an exploded view of the strut below. Where I highlighted, check for evidence of oil leaks. The coil is circled with a red pen. Check to make sure there are no cracks in it specifically where it mounts. In blue pen I circled the mount I referred to. To replace it requires the assembly to be removed and taken apart.
Let me know what you find or if you have other questions.
Take care,
Joe
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Saturday, November 14th, 2020 AT 6:54 PM