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Message: <blockquote data-quote="Game-R" data-source="post: 636251" data-attributes="member: 27709">Do you mean "roars" louder or actually "growls" louder? Do you have any recording of the sound?Your mechanic found the old fan clutch to have been loose or seized up when he replaced it?The roaring is normal when the engine is hot and the clutch has locked the fan to your engine pulley. These fans really do "suck" <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big Grin    :D" loading="lazy" data-shortname=":D" /> but they also sap a good chunk of horsepower when they are operational. Hence the necessity for the clutch to disconnect the fan from your engine when not needed.</blockquote>