The M20111-DD Headbolt Hole Repair Fixture is a precision alignment tool kit designed to restore and repair cylinder head bolt holes in Detroit Diesel 60 Series engine blocks. It provides the Precision support and concentric alignment needed to ream, tap, and install thread repair inserts with accuracy and confidence.
During rebuilds of Detroit 60 blocks, headbolt holes may become damaged due to corrosion, cross-threading, or removal/installation stress. The M20111-DD fixture precisely aligns the repair tooling so that repairs are made without skew, misalignment, or damage to adjacent surfaces. The kit supports use of bolt hole thread inserts such as ATC-8707 (available separately) to reestablish proper M16 × 2.0 threads.
Key Features & Benefits
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Purpose-built for Detroit Diesel 60 Series headbolt repair operations
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Rigid fixture ensures correct alignment during reaming and tapping
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Facilitates safe, repeatable installation of thread inserts (e.g. ATC-8707)
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Helps avoid misaligned bolt holes, head gasket leaks, or structural weakening
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Heavy-duty construction designed for repeated shop use
Typical Applications
Use the M20111-DD when rebuilding Detroit 60 engine blocks, replacing head gaskets, or repairing stripped or damaged head bolt holes. It is ideal for professional diesel shops, remanufacturers, and engine rebuilders specializing in Detroit Diesel powerplants.
