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Diesel Basics Mexican Hat Position Piston

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A DI engine has the combustion chamber cavity in the crown of the piston. This design is called a Mexican Hat piston. Note the size of the pin bore for the wristpin. You will not find anything like that in a gas engine!
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A DI engine has the combustion chamber cavity in the crown of the piston. This design is called a Mexican Hat piston. Note the size of the pin bore for the wristpin. You will not find anything like that in a gas engine!  View Related Article

 

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