General Car Conversation
Lexus Champion
Joined: Jan 2012
Posts: 17,019
Likes: 496
From: Knoxville, TN
Lexus Test Driver
Joined: Apr 2012
Posts: 6,214
Likes: 461
From: Long Island
anyone know why only the toyota trucks/suvs (4Runner and GX in particular stand out to me) make like a crazy amount of fan whooshing noise on startup?
if it's just to sound more heavy duty and truck-like then i approve since it does sound kinda beastly lol
if it's just to sound more heavy duty and truck-like then i approve since it does sound kinda beastly lol
Its the stupid clutch fan, I guess in the GX/LX/4Runner they are needed for offroading when the engine is under extreme loads. From what I know, LS430 also had the fan, but GS430 didn't.
Last edited by Och; Jun 21, 2022 at 04:52 PM.
Thread Starter
Lexus Fanatic
Joined: May 2012
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From: Maryland
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Lexus Fanatic
Joined: Sep 2010
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From: Alberta
Lexus Champion
Joined: Jan 2012
Posts: 17,019
Likes: 496
From: Knoxville, TN
Oh and about the traffic lights, they weigh TONS also.... Once I saw a storm blow one off into one of the worst intersections in town it was a hell of a crash, I called 911.
Lexus Fanatic
Joined: Nov 2011
Posts: 35,383
Likes: 357
From: ON/NY
LX cooling fans come on every single startup. Deliciously truck-like. It's just a pleasant whoosh from inside. Also the fans you faintly hear as you drive off intermittently, especially when it's hot. I swear last week when it was 100 degrees the fans stayed on well into 2nd gear. They usually cycle off once you're above 5-10MPH.
Oh and about the traffic lights, they weigh TONS also.... Once I saw a storm blow one off into one of the worst intersections in town it was a hell of a crash, I called 911.
Oh and about the traffic lights, they weigh TONS also.... Once I saw a storm blow one off into one of the worst intersections in town it was a hell of a crash, I called 911.
Lexus Champion
Joined: Jan 2012
Posts: 17,019
Likes: 496
From: Knoxville, TN
I like the fans. There is no heat-soak at all, if there was it would be different. Step on that gas and the revs go up fast.
Lexus Fanatic
Joined: Sep 2010
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From: Alberta
Lexus Champion
Joined: Oct 2019
Posts: 18,096
Likes: 1,740
From: Ohio
That's strange, the 400/430/460 all are nearly totally silent fan wise even after you push them super hard in hot weather.
Lexus Champion
Joined: Oct 2019
Posts: 18,096
Likes: 1,740
From: Ohio
Viscous coupling fans start "locked" when you first kick the engine over then unlock quite quickly when the fluid gets forced out and there isn't enough heat to have the clutch engage. That is actually an easy way to know it's working properly, it's intended to allow less drag on the engine unless the airflow is actually needed. On my 17 ram I had, I simply removed the clutch fan entirely since it was not needed at all for my uses.