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General E46 Forum
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Old 08-27-2012, 11:32 PM   #21
Brinkley
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That is very rare to have a mechanical fan in addition to the aux fan for a manual transmission 328i.
Tour aux fan is in front of your radiator?
Not really I have the same setup, so do many others, early production 323/8s have the clutch/aux combo until they switched to electric fan only for manuals. We basically have the same as autos.
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Old 08-27-2012, 11:38 PM   #22
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Part of the problem is that you didn't replace the entire cooling system.

The following should be checked:

there's a blockage in your radiator

thermostat stuck closed or partially closed

there's air in the system

aux. fan switch is not functioning

pusher fan is not functioning

mechanical fan is not functioning

All this is remedied by replacing the entire cooling system and performing a proper bleed.
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Old 08-28-2012, 12:08 AM   #23
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Head gasket?
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Old 08-28-2012, 02:59 PM   #24
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Originally Posted by E46Mango View Post
Part of the problem is that you didn't replace the entire cooling system.

The following should be checked:

there's a blockage in your radiator

thermostat stuck closed or partially closed

there's air in the system

aux. fan switch is not functioning

pusher fan is not functioning

mechanical fan is not functioning

All this is remedied by replacing the entire cooling system and performing a proper bleed.
The only thing haven't replaced is the radiator. I will be switching the clutch fan to the electric fan today, hopefully that will fix the problem
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Old 08-28-2012, 03:08 PM   #25
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The only thing haven't replaced is the radiator. I will be switching the clutch fan to the electric fan today, hopefully that will fix the problem
How many mile are on your car? I think word is that ther radiators should be replaced at 150k.
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Old 08-28-2012, 03:28 PM   #26
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How many mile are on your car? I think word is that ther radiators should be replaced at 150k.
I just recently passed 90k
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Old 08-28-2012, 04:29 PM   #27
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I am going to go out ona limb and say that your aux fan may not be working correctly. You mention your ac is not as cold.

When you have a cooling system failure like the expansion tank, you need to find the reason for the overheating. If your aux fan is not coming on properly, then your temp can increase especially with the ac on.

Here is a way to check it:

Turn your car on, ac off. Ck aux fan, should not be running.

Next turn your ac on, Aux fan should come on.

Next disconnect temp sensor in lower radiator hose. Aux fan should speed up to full speed.

If it works correctly, then it may not be your fan. But you have replaced most everything else in the cooling system.

Bleed, burp, bleed the system.

Do you have any oil in your coolant? Check your oil too. This would indicate a bad head gasket. You say you are not loosing coolant, so it is unlikely a bad head gasket.
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Old 08-28-2012, 05:58 PM   #28
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Not really I have the same setup, so do many others, early production 323/8s have the clutch/aux combo until they switched to electric fan only for manuals. We basically have the same as autos.
I don't think it is as common on manual 3 series as you think. I have an early 323i manual and mine does not have the mechanical fan. I think you misinterpreted my statement. I said it was rare, I did not say it does not exist. Let say it was a few months where they had it. That makes it rare because a vast majority of them do not have the mechanical fan.

They also don't mention that setup in the bentley manual.
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Old 09-06-2012, 03:34 PM   #29
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Turns out that after I replaced almost every component of the cooling system and the car still overheated. The only part that I didn't replace- the radiator, doesn't seem to be circulating well because as the upper radiator hose heats up the bottom hose and the radiator are still cold. I bought a new Behr radiator and my car will be all good by tomorrow. Hopefully
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Old 12-13-2012, 11:40 PM   #30
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on one note, I programmed a 1998 528 manual and it had a mechanical fan on it. It tripped me out. Anyways, Ive done my coolant bleeding with the car off, position 2, temp on 90, speed lowest, all vent options open, and the dial in the middle of center vents on all the way red and never had an issue. I'm also using prestone 50/50, after doing research through numerous forums and came to the conclusion that while BMWs coolant may be somewhat better, this stuff works and has been working for over 10,000 miles. No issues here.
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Old 12-14-2012, 09:18 AM   #31
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I don't think it is as common on manual 3 series as you think. I have an early 323i manual and mine does not have the mechanical fan. I think you misinterpreted my statement. I said it was rare, I did not say it does not exist. Let say it was a few months where they had it. That makes it rare because a vast majority of them do not have the mechanical fan.

They also don't mention that setup in the bentley manual.
lol just saw this, you basically said what I said, if your car was produced before the switch, you got a clutch fan, after, an electric fan. Nothing rare or mysterious about it. Perhaps the bentley just assumes that if you have a bentley you can tell the difference between clutch/electric fans and just look at the auto for instruction.

Last edited by Brinkley; 12-14-2012 at 09:20 AM.
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Old 12-14-2012, 09:50 AM   #32
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lol just saw this, you basically said what I said, if your car was produced before the switch, you got a clutch fan, after, an electric fan. Nothing rare or mysterious about it. Perhaps the bentley just assumes that if you have a bentley you can tell the difference between clutch/electric fans and just look at the auto for instruction.
maybe you should read what I said!

I am not saying what you said!

You don't understand that the manual transmissions come with only an electric fan. If you have a mechanical clutch fan as well, then that is not typical. I do not have a mecganical clutch.

Please clarify this for all of us, So tell us what date ranges have the mecanical fan in addition to the electric fan on a manual transmission car.
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Old 12-14-2012, 09:56 AM   #33
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I can confirm I had a mechanical clutch fan in my 99 323. Production date was 11/98
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Old 12-14-2012, 10:00 AM   #34
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How many mile are on your car? I think word is that ther radiators should be replaced at 150k.
Think you got that backwards. Radators cost $150!
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Old 12-14-2012, 12:11 PM   #35
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Look dude. Early model manuals came with clutch fans, k? I don't get why this is such a big deal.
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Old 12-14-2012, 12:44 PM   #36
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Look dude. Early model manuals came with clutch fans, k? I don't get why this is such a big deal.
Again i can confirm my manual 323 came with one
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Old 12-14-2012, 01:16 PM   #37
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Thanks, good looking m3 there!
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Old 12-14-2012, 01:20 PM   #38
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Look dude. Early model manuals came with clutch fans, k? I don't get why this is such a big deal.
My 2000: build 10/99 has electric fan.

Maybe just on e46 builds of late 1997 and 98 had the clutch fan.


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Old 12-14-2012, 01:28 PM   #39
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Yea probably something like that. I drive a 7/98 328, so I guess to most people I'm a VERY freaking early model. Anyways, I used to think I was special or something or had got ripped off, but it's just I have an early car.
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Old 12-14-2012, 01:40 PM   #40
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Yea probably something like that. I drive a 7/98 328, so I guess to most people I'm a VERY freaking early model. Anyways, I used to think I was special or something or had got ripped off, but it's just I have an early car.
Was it originally purchased in Europe?

I know on RealOem it shows for 328i 9/97 as the earliest production month for US delivery.

Europe is: 4/97

Looks like it could it be a cooling package (Hot climate version) option, again just based on looking at realoem.
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