This 10-phase procedure uses the LS-8707 insert to repair stripped head bolt holes on Detroit Diesel 60 Series engines—restores strong M16 × 2.00 threads with fixture alignment for head reinstallation. Introduction: Precise Head Bolt Hole Repair for Detroit 60 Series The LS-8707 insert with fixture alignment ensures proper axis and torque—vital for gasket sealing and preventing head lift. Phase 1-3: Preparation & Damaged Hole Assessment Secure engine block – Fixture or stand support Remove cylinder head – Full access to stripped holes Inspect & measure threads – Confirm stripping & depth required Phase 4-6: Hole Preparation & Insert Installation Install M20111-DD alignment fixture – Maintain precise axis Ream & tap to 13/16"-16 – Clean, straight, full depth Apply thread locker & install LS-8707 – Torque to spec Phase 7-10: Finishing & Verification CRITICAL: LS-8707 Insert Protocol Trim excess insert if needed – Flush to deck Chase M16 × 2.00 internal threads – Clean & true Reinstall cylinder head – Torque sequence to Detroit spec Pressure test & run engine – Verify no leaks Critical Warnings: Thread Insert Installation Hazards AVOID THESE CATASTROPHIC MISTAKES: ❌ No alignment fixture – Crooked insert & misalignment ❌ Shallow tap depth – Weak thread engagement ❌ No thread locker – Insert backing out ❌ Over-torque insert – Block cracking risk ❌ Skip internal thread chase — Bolt seizure Why LS-8707 Beats Other Repair Methods Alternative Risks: ❌ Heli-coil → Limited strength & failure risk ❌ Oversize bolt → Misalignment & uneven torque ❌ Block replacement → $12K–$25K cost LS-8707 Advantages: ✅ Deep 2.50" engagement ✅ Accepts standard M16 × 2.00 bolts ✅ Fixture-compatible precision ✅ Saves block & thousands ✅ Bulk pricing to $32.48 ✅ Proven DD60 solution Repair Detroit 60 Head Bolt Holes Professionally. M16 Strength. Save Blocks. Boost Rebuild Profits. Get LS-8707 – $56.00