M20111-C Headbolt Hole Repair Fixture – Cummins ISX Heavy-Duty Engine Tool

The 20111‑C Headbolt Hole Repair Fixture is a precision alignment and repair fixture engineered specifically for the Cummins ISX series engine blocks. Designed to correct stripped, misaligned or damaged head-bolt holes, this tool ensures proper Thread Insert alignment — restoring engine block integrity and enabling safe installation of replacement threads or inserts.

Built for high-demand heavy-duty engine rebuild environments, the 20111-C fixtures provide machinists and remanufacturers with a turnkey solution for repairing head-bolt hole damage — reducing costly rework, loose headbolts, and potential head-gasket seal failures. By maintaining correct head-bolt alignment and torqueing ability, the tool supports consistent gasket sealing, uniform clamping loads, and improved engine longevity.

Key Features & Benefits

• Purpose-built for Cummins ISX engine blocks — addressing common issues with head-bolt hole damage.

• Aligns and stabilizes block geometry during tap, ream, and thread-insert repair operations.

• Conserves structural integrity of the block and supports OEM-level restoration of bolt hole alignment.

• Ideal for machine shops, remanufacturers, overhaul facilities and fleets servicing ISX powerplants.

• Helps prevent head-gasket leaks, misclamp events and early engine faults caused by improper bolt-hole repair.