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Message: [QUOTE="Zmann, post: 950719, member: 2025"] what i was getting at is while the fan is always spinning it's not spinning at the same rpm's as the water pump pulley unless the pcm tells it to via an electrical signal that heats fluid and locks up the clutch however the amount it locks up is also controlled and the pcm knows what rpm the fan is spinning at via a sensor ( like slipping a manual trany clutch ) so your fan does come on and you would only want to stop it with your hand first thing in the morning (if ever LOL) [/QUOTE]

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