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The torque sequence for a 3Y engine typically involves tightening the cylinder head bolts in a specific order to ensure even pressure and prevent warping. Start by tightening the bolts to a specified initial torque, usually in a crisscross pattern, followed by a final torque stage. It's crucial to refer to the manufacturer's specifications for precise torque values and the exact sequence, as this can vary. Always use a calibrated torque wrench for accurate results.

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