Spinning Body Mount Bolt ? The Fix Nobody Shows | EP 39 RUSTORATIONS 1972 Nova

Removing seized body mount bolts sounds simple… until the cage nut starts spinning. In this episode of the restoration series, I tackle one of the most frustrating problems DIY restorers face: rusted body mounts that refuse to come out without destroying everything around them. This car has been off the road since 1977, and what started as a quick check turned into cutting the floor open, cleaning decades of debris, repairing hidden rust, and permanently fixing the body mount so it never fails again. If you’re restoring a classic car at home, this video shows: What happens when a body mount cage nut breaks loose Why spraying internal frame coating isn’t enough How to properly repair and reinforce body mount mounts Welding tips, epoxy protection, and long-term rust prevention Why doing it “the hard way” is sometimes the right way This isn’t a shortcut video — it’s a real DIY fix, mistakes and all, so you don’t get burned the same way. 🔧 Tools & techniques shown: Penetrating oil & heat methods Cutting access panels properly Cleaning internal crossmembers Epoxy primer vs internal frame coating Welding new cage nuts & patch panels 0:00 Seized Body Mounts – What Can Go Wrong 0:52 Testing the Body Mount Bolts Before Removal 2:40 Uh-Oh… The Cage Nut Is Spinning 3:04 Why This Repair Gets Complicated Fast 3:53 Cutting the Floor Open (No Other Choice) 4:03 Expanding Access to Restore the Crossmember 5:21 Heat, Cutting & Removing the Failed Mount 6:32 Inside the Crossmember – Hidden Rust & Debris 7:16 Why Internal Frame Coating Misses Critical Areas 8:43 Cutting the Bolt & Removing the Cage Nut 10:23 Why Replacing the Cage Nut Is the Only Option 11:49 Cleaning & Prepping for Epoxy Protection 12:50 Epoxy Primer Inside the Crossmember 13:14 Installing the New Cage Nut & Body Mount 14:53 Welding Strategy for Strength & Alignment 16:13 Teaching the Next Generation (Shop Moment) 18:30 Why This Failure Is a Safety Issue 19:13 Rebuilding the Floor Using Saved Metal 21:42 Welding Settings & Patch Panel Tips 22:47 Final Results & Lessons Learned 23:48 Why I Should’ve Replaced the Entire Floor 24:02 Moving On to the Subframe Restoration Disclaimer: Videos produced by SUBDIVISION AUTO are provided for informational and entertainment purposes only. All material provided within this website is for informational, educational, & entertainment purposes only. Some of these projects, materials, and techniques may not be appropriate for all ages or skill levels. The DIY instructions used here are used to simply breakdown projects to their simplest steps. Please use a clear mind and use all safety precautions while following the tutorials provided by this site. SUBDIVISION AUTO does not make any claims of the safety of the projects, techniques, or resources listed on this site and will not take responsibility of what you do with the information provided by this site. Viewers must be aware by doing projects on their cars they are doing it at their own risk and SUBDIVISION AUTO cannot be held liable if they cause any damage to their cars. Subdivision Auto may earn an affiliate commission if you purchase something through recommended links.