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Metal Stitching Stitching Products Services Training Technical Support Cast Iron Welding Repair Examples Special Repairs Spark Plug Thread Repair Inserts Articles2.5 GM Cylinder Head

 

1.  2.5 GM cylinder head
2.  crack extending across induction-hardened exhaust seat

3.  using the extension kit to drill
4.  LHC724 heat-conductive sealant

GMhead5-6.gif (39931 bytes)

5.  installing first L6AS stitching pin
6.  first pin after installation

GMhead7-8.gif (44893 bytes)

7.  grinding down tops of installed pins
8.  last hole drilled in center of seat

GMhead9-10.gif (42506 bytes)

  9.  finish grinding the repair with a stone
10.  finished repair after texturizing with needle scaler

GMhead11.gif (23204 bytes)

11.  seat cut over repair; no insert installed

Return to Cylinder Head Repairs

 

Here are links to some of our videos on YouTube.

YouTube, Full-Torque Permanent Thread Repair
YouTube, Full-Torque Permanent Thread Replacement Insert
YouTube, Cast Iron Crack Repair
YouTube, Lock Installation on Crack Repair

 
Here are some links to articles in industry-related professional publications:
Engine Professional, January-March 2010 Issue
Engine Builder, What's Hot in Cold Crak Repairs!
Engine Builder, Learning Curve
Engine Builder, The Properties of Cast Iron
Engine Builder, Pinning Down the Cold Repair Process

 

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