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Broken Upper Mounting Bolt or Stripped Mounting Nut. [Tips from Jason Vincent] I tried to remove the passenger side shock, but promptly broke either the bolt or the welded nut inside the channel behind the top mount. As barbarous as it sounds, the fix (as told by my Volvo specialist) is to use a hole saw to go through the opposite side of the channel. On the passenger side this involves removing part of the exhaust. I used a 1 3/4" hole saw to cut my hole in line with the shock, as high up as was physically possible. The nut is not normally exposed. To expose it the box section as I will call it needs to be cut, although on the opposite side of the box, parallel to the upper mount. This process seems barbaric, and it is in some respects, but remember how overbuilt this car is and I really don't think a couple of holes will hurt it. I did go through 2 holesaws and discovered the nut wasn't actually spinning, but the bolt was stripped and jammed into the nut somehow. However, the welded nut can often break loose and spin inside the box channel. I will attempt to extract it and install a helicoil. [Editor] To prevent this, use lots of antiseize on the threads and shaft of both top and bottom shock mounting bolts when reinstalling. Stripped Nut? [Jim Bowers] Get a Heli-Coil repair kit if you strip the upper shock mount nut. The nut is welded inside the frame and there is no easy access to it. The Helicoil can be installed from the wheel side. Buy the kit at a good auto parts or machine supply store