Does anyone know this part of block

[5.0Mustang22]

What is this half circle cut in the engine block on left side? Did it have a purpose to hold engine or what?

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[Jackson1320]

Part of the casting and machining

 

[5.0Mustang22]

Part of the casting and machining

Thank you, so then its on all 5.0 engines?

 

[Firsttexan]

If it's the bolt in the block you are referring to? That's one of the Main cap crossbolts. It for added internal strength.

 

[Jackson1320]

It should be on all coyotes in that generation

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