Main bearing oil feed hole modifications

 When to Modify: Part 1, all engines.

  Part 2- Engines over 550 HP, and to be used above 6000 rpm.

 Modification Text: In this modification, we will be correcting a mis-alignment between the main bearing shell holes, and the main bearing oil feed holes. Part two will include drilling the center 3 main bearing holes oversized. 

Part 1

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Last modified: September 30, 2005