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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 3 Series / 4 Series > E46 (1999 - 2006)

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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  #1  
Old 10-31-2016, 11:55 AM
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smolck smolck is offline
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Fan delete for Auto

So the new E46 has had a lot of work done to it since I bought it. But I could NOT find The source of a small vibration at idle. No codes, no leaks, no nothing. Just a tiny little vibration that went away right off idle.

But me being me it was driving me BONKERS. I changed plugs, the DISA, ran fuel trim reports, smooth running values, reset adaptations, you name it. And it was still there.

I had decided to ignore it and see what happened.

Well, today I decided to delete the manual fan from my car and go to a an electric fan from a manual car. The reasons:
1. Car sounds like a bus
2. More power (no drag on the engine)
3. Safety
4. Ease of maintenance
5. Many m54 engine cars from BMW have auto transmissions and electric fans. For example, the 2005 X3, the 2004 535i sport, and the v8 2008 550i.

Now some may see #3 and think "safety, what an idiot". But just this weekend I had to fix an E46 that had thrown ALL of its fan blades. One went through the hood!

So anyways, I pulled my fan off and found my vibration. And so glad I caught it in time.

So now my car idles smooth as silk, has more pep, and runs at the same temps as before (monitored by torque app, not the gauge).

Great mod IMO!
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  #2  
Old 10-31-2016, 11:58 AM
SPDSKTR SPDSKTR is offline
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Easiest 6 WHP to gain on that car. Great job!
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  #3  
Old 10-31-2016, 12:09 PM
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smolck smolck is offline
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Yea, I get the 3.64 diff on Nov 5th.......can't wait for more ooomph!
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now, go burn your Man Card, and buy yourself a Camry....
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  #4  
Old 10-31-2016, 12:15 PM
SPDSKTR SPDSKTR is offline
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Yea, I get the 3.64 diff on Nov 5th.......can't wait for more ooomph!
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  #5  
Old 11-22-2016, 05:21 PM
Coqui_pr Coqui_pr is offline
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Geez, I am going to look at mine closely. Was the car wired for the electrical fan? Every time I watch a you tube video they have to remove the fan and shroud. It will ba a lot easier with the electrical fan.
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  #6  
Old 11-22-2016, 08:53 PM
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smolck smolck is offline
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Originally Posted by Coqui_pr View Post
Geez, I am going to look at mine closely. Was the car wired for the electrical fan? Every time I watch a you tube video they have to remove the fan and shroud. It will ba a lot easier with the electrical fan.
All you do is plug the electric fan in where the aux fan connects. No wiring, no splicing, plug and play.

I have a scanner that reads real time data, engine temp never exceeds 204 degrees (idling in traffic on 80 degree day) and the trans never got above 180ish if memory serves. Works great.
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now, go burn your Man Card, and buy yourself a Camry....

Last edited by smolck; 11-22-2016 at 08:54 PM.
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  #7  
Old 11-23-2016, 04:23 AM
Coqui_pr Coqui_pr is offline
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Thanks.
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  #8  
Old 11-23-2016, 08:11 AM
lincolnshibuya lincolnshibuya is offline
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was the reason why automatics has the clutch fan because the transmission needs it?


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  #9  
Old 11-23-2016, 08:28 AM
Coqui_pr Coqui_pr is offline
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Good question. If I recall correctly the thermostat that route cooling to the transmission opens at 110 degrees.
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  #10  
Old 11-23-2016, 11:29 AM
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smolck smolck is offline
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Quote:
Originally Posted by lincolnshibuya View Post
was the reason why automatics has the clutch fan because the transmission needs it?


--------------------------------------------
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I suppose that was the original thought. But then BMW has moved away from them.

I just replaced a cooling system on an 04 x3 (same m54b30 engine and trans as my car) and it is equipped with an electric fan only from the factory.

I work on an 04 535i, also has the m54b30 engine and auto trans and it has only an electric fan.

My brother in law has an 07 550i with a 4.4 v8 and auto trans and it only has an electric fan. And it has an oil cooler as well a step a trans cooler plumbed through the radiator.

And of course my car, it runs the exact same temps it did prior to removing the mechanical fan.

So you tell me, is it "needed"? Nope.
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now, go burn your Man Card, and buy yourself a Camry....
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  #11  
Old 11-23-2016, 11:33 AM
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MalibuMafiaV MalibuMafiaV is offline
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Probably one of the best things to do on an E46 auto. The point of "ease of maintenance" is the best.
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  #12  
Old 11-23-2016, 11:35 AM
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smolck smolck is offline
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Quote:
Originally Posted by MalibuMafiaV View Post
Probably one of the best things to do on an E46 auto. The point of "ease of maintenance" is the best.
Amen. Not having it sound like a bus is nice, but the ease of maintenance is the best part. Worth every penny of the $137 I paid for the fan.
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Quote:
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now, go burn your Man Card, and buy yourself a Camry....
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  #13  
Old 11-23-2016, 11:47 AM
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MalibuMafiaV MalibuMafiaV is offline
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Quote:
Originally Posted by smolck View Post
Amen. Not having it sound like a bus is nice, but the ease of maintenance is the best part. Worth every penny of the $137 I paid for the fan.
If I would of known my girl was going to buy an E46. I would of pulled so many parts off mine for hers lol. INCLUDING the fan! dangit.
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TheMalibuMafia.com

BMW 2006 M5 - REALLY LOUD
BMW 2007 335i. ST Garrett GT35R.
Audi S4 2000 Stage 3 - Dat turbo spool - SOLD
BMW 2000 3-series - Supercharged Because race car SOLD
Maserati 2004 M128 GT - HREs/tint/straight piped SOLD
BMW 2006 M3 - stock - SOLD
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  #14  
Old 11-23-2016, 02:30 PM
SPDSKTR SPDSKTR is offline
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Location: Birmingham, AL, USA
 
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Let's not forget the "free" gain of 6 WHP.
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  #15  
Old 11-23-2016, 02:55 PM
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MalibuMafiaV MalibuMafiaV is offline
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Quote:
Originally Posted by SPDSKTR View Post
Let's not forget the "free" gain of 6 WHP.
That is true. Very important.
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TheMalibuMafia.com

BMW 2006 M5 - REALLY LOUD
BMW 2007 335i. ST Garrett GT35R.
Audi S4 2000 Stage 3 - Dat turbo spool - SOLD
BMW 2000 3-series - Supercharged Because race car SOLD
Maserati 2004 M128 GT - HREs/tint/straight piped SOLD
BMW 2006 M3 - stock - SOLD
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  #16  
Old 11-23-2016, 04:16 PM
Dave1027 Dave1027 is offline
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Quote:
Originally Posted by smolck View Post
I have a scanner that reads real time data, engine temp never exceeds 204 degrees (idling in traffic on 80 degree day) and the trans never got above 180ish if memory serves. Works great.
What app/hardware are you using to read transmission temperatures?
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  #17  
Old 11-23-2016, 04:57 PM
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smolck smolck is offline
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Quote:
Originally Posted by Dave1027 View Post
What app/hardware are you using to read transmission temperatures?
My brother in law has a handheld device that reads real time trans data and other BMW specific things. I couldn't tell you off the top of my head what it's called.
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now, go burn your Man Card, and buy yourself a Camry....
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  #18  
Old 11-23-2016, 09:04 PM
lincolnshibuya lincolnshibuya is offline
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Quote:
Originally Posted by smolck View Post
I suppose that was the original thought. But then BMW has moved away from them.

I just replaced a cooling system on an 04 x3 (same m54b30 engine and trans as my car) and it is equipped with an electric fan only from the factory.

I work on an 04 535i, also has the m54b30 engine and auto trans and it has only an electric fan.

My brother in law has an 07 550i with a 4.4 v8 and auto trans and it only has an electric fan. And it has an oil cooler as well a step a trans cooler plumbed through the radiator.

And of course my car, it runs the exact same temps it did prior to removing the mechanical fan.

So you tell me, is it "needed"? Nope.

was wondering if those electrical fans in x3 and 5-series have the same cfm specs as the e46, otherwise the engineers did a lousy job of spending money on a useless clutch fan.


--------------------------------------------
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  #19  
Old 11-23-2016, 09:36 PM
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smolck smolck is offline
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Quote:
Originally Posted by lincolnshibuya View Post
was wondering if those electrical fans in x3 and 5-series have the same cfm specs as the e46, otherwise the engineers did a lousy job of spending money on a useless clutch fan.


--------------------------------------------
https://www.facebook.com/diybmwe46
Doesn't really matter, the electric fan from the manual e46s works just fine on an auto car. That was the whole point of the thread. BMW isn't infallible and makes bad decisions, anyone who has replaced their window regulators many times can attest to that
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