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LESSON 3: POWERTRAIN
Locking Pin
The locking pin locks the camshaft in a fully advanced position when the engine is off.
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The pin locks the phaser to the camshaft during startup.
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After startup, oil pressure at the VCT assembly will unlock this pin, allowing VCT operation to resume.
– Makes it easier to start engine.
– Reduces noise on startup.
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VCT does not control valve timing until the oil temperature reaches 32°F (0°C).
2005 Expedition/Navigator New Model Technician Training 02-SEP-04 3-21