328i 1999 My fan clutch stays engaged the whole entire time I drive - Bimmerfest - BMW Forums



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E46 (1999 - 2006)
The fourth generation 3 Series (E46 chassis) was introduced in 1999 and set the standard for engineering and performance during it's years of production including being named to Car & Driver's 10 best list every one of those years! ! -- View the E46 Wiki

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Old 06-11-2017, 07:12 PM
M3angel2001 M3angel2001 is offline
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328i 1999 My fan clutch stays engaged the whole entire time I drive

Ok it's my first time using this but I'm in big need of help I'm hoping some one can help so here goes nothing

I drive a 328i 1999 My fan clutch stays engaged the whole entire time I drive there's a few times it shuts off but other than that it's mostly on the other weird thing is that I've never seen my radiator fan turn on so I'm really out of things here ive replaces the fan clutch and fan but it continues to make like a vaccume noise when I drive I'm in need of help what can it be ?
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  #2  
Old 06-11-2017, 07:18 PM
M3angel2001 M3angel2001 is offline
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Fan clutch engaged

Ok it's my first time using this but I'm in big need of help I'm hoping some one can help so here goes nothing

I drive a 328i 1999 My fan clutch stays engaged the whole entire time I drive there's a few times it shuts off but other than that it's mostly on the other weird thing is that I've never seen my radiator fan turn on so I'm really out of things here ive replaces the fan clutch and fan but it continues to make like a vaccume noise when I drive I'm in need of help what can it be ?
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  #3  
Old 06-11-2017, 08:08 PM
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eparayno eparayno is online now
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It's a 3 year old thread and you're in the 5 series section....with that out of the way - what brand fan clutch did buy? If it's an aftermarket off the shelf one then I'd suspect it's the unit itself. Fan clutches are fully engaged at startup and in stop and go traffic only unless you might have a warm climate/heavy duty one.
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Old 06-11-2017, 08:25 PM
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tim330i tim330i is offline
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Moved to our E46 3 Series forum.
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Old 06-11-2017, 08:47 PM
M3angel2001 M3angel2001 is offline
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It's a oem I won't ever use aftermarket parts I changed both clutch and fan but it just stays engaged the time I drive but my radiator fan doesn't turn on


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Old 06-11-2017, 09:41 PM
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Its supposed to stay engaged to some extent. It doesn't "stop" ever. The clutch lets the fan "free wheel" to some extent but your never going to see it sit still with the motor running.

If its sounds like a jet engine then its "stuck" on. If you see it spinning but you don't hear it and the cars not overheating your in good shape in general.

On a real hot day leaving a parking lot you will hear it doing the jet engine noise. The hotter it gets the more it sets itself to the motors actual speed. So if its real hot outside it will make a bunch of noise as you rev up pulling out into traffic.
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Old 06-11-2017, 09:43 PM
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The electric fan on the front of the radiator should turn on when you turn the air conditioner on. If the air conditioner is on and blowing cold air (aka it works too) then the electric fan on the front of the radiator should be on. If it isn't you have an issue with the electric fan.
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My BMW howto's

1995 318is

1997 528i

2000 323i 400k miles and climbing
Converted from automatic to 5 speed manual

2005 X5 3.0 with Nav, adaptive headlights etc

-------

Hunting for X3 and a 7 series....
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Old 06-12-2017, 06:24 AM
M3angel2001 M3angel2001 is offline
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Should I check the relay for the radiator fan ? And yea the jet noise is on the whole time I drive but I waste a lot of gas cause it's probably stuck on I'm thinking since the radiator fan doesn't turn on wouldn't that mean that the fan clutch would stay on ? Would it be better to convert it to an electric fan


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Old 06-12-2017, 07:22 AM
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If its an automatic you need to stay with the mechanical fan. It just works better since the way bmw cools the auto trans the trans temps can spike with an electric only setup vs the mechanical.

A new fan clutch for my e46 was $40 or something when I replaced it from autozone last time. The one for my X5 was $80 that I just replaced.

The front fan diags can be found on the site here. Just use the search button.
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My BMW howto's

1995 318is

1997 528i

2000 323i 400k miles and climbing
Converted from automatic to 5 speed manual

2005 X5 3.0 with Nav, adaptive headlights etc

-------

Hunting for X3 and a 7 series....
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Old 06-13-2017, 05:08 AM
marcozandrini marcozandrini is offline
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Here's great info in the electric fan: https://drive.google.com/file/d/0B59...VlE/view?pli=1
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Old 06-16-2017, 05:54 PM
M3angel2001 M3angel2001 is offline
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Hey guys I need help my BMW continues to sound like a jet any idea what it might be ?


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Old 06-16-2017, 07:22 PM
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You have an automatic, right?
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Old 06-16-2017, 08:58 PM
M3angel2001 M3angel2001 is offline
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Yea


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Old 06-16-2017, 10:17 PM
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tim330i tim330i is offline
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Can you turn the fan by hand when the engine is off?
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Old 06-17-2017, 06:24 AM
M3angel2001 M3angel2001 is offline
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It turns off with the engine it's a fan clutch


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Old 06-17-2017, 10:22 AM
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From your description it isn't working correctly, so it seems like a good place to start checking.
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Old 06-17-2017, 08:10 PM
M3angel2001 M3angel2001 is offline
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Well I replace the fan and the disc on where it sits on but it still dies the same thing


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