5.7L Third-Gen Engine Build - Balance Of Power :Decision '07
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This is an I-beam connecting rod. The red arrow indicates the use of a connecting rod bolt/nut, where the top portion of the bolt hole must be machined along the axis of the rod to squarely seat the bolt head. This creates a stress area where the orange arrow indicates, as the material makes a complex shape transition there. This area and the corresponding area where the bottom cap is cut away for the bottom nut are the weakest points due to stress concentration on this rod design. View Related Article
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