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I have had to deal with rust bound lower mounting bolts on shocks before. In the past I have burned away the rubber bushings surrounding the rolled sleeve and worked around the lower attachment of the shock absorber applying heat and working a cold chisel into the seam on the rolled sleeve.
On my son's 1988 744t I found things bound up so tight I couldn't initially turn the bolt after removing the nut on the lower shock attachment.
I used my die grinder with a well worn wheel (small diameter) to make two cuts on the lower shock mount. That allowed me to remove the shock after removing the top bolt (no rust on the upper mount).
After removing the shock I used a knife to cut away the three pieces of rubber and that exposed the entire rolled sleeve. A propane torch was enough to heat the sleeve and bolt enough that I could rotate the assembly to clearly see the seam on the sleeve. I used additional heat (mapp gas would have been nice) and then used a large cold chisel to open the sleeve before driving out the bolt.
The replacement of both shocks took a little more than an hour.
Randy
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