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LESSON 3: POWERTRAIN
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Charge Motion Control Valves (CMCV) manage the flow of air into the cylinders.
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Vibration-resistant ribbing and reinforcement in the lower engine block help manage and tune sound and
vibration.
– The engine block ribbing strengthens the block wall similar to cross reinforcements in a building wall.
2005 Expedition/Navigator New Model Technician Training 02-SEP-04 3-3