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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Fri, Jun-07-2019, 04:32:55 PM   #31
HassanEido
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Default Re: Overheating in Traffic—Aftermarket Radiator Daily Performance

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Originally Posted by Andrebxp View Post
Any particular reason not to use more water, or water wetter?
Coolant has anticorrosion additives and acts as a lubricant to ur water pump. I wouldn't run a higher mix of water unless extreme heat. A higher mix of water does absorb more heat than coolant but at a cost.
Regarding water wetter, why fix an issue with a bandaid rather than addressing the root cause and be done?
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Old Fri, Jun-07-2019, 04:57:45 PM   #32
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Default Re: Overheating in Traffic—Aftermarket Radiator Daily Performance

Water wetter does have negative issues long term, too.
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Old Fri, Jun-07-2019, 05:30:15 PM   #33
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Default Re: Overheating in Traffic—Aftermarket Radiator Daily Performance

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Originally Posted by Andrebxp View Post
Any particular reason not to use more water, or water wetter?
For what it's worth, Koyorad ships with a big warning saying that using water wetter or similar products will void the warranty.

I ran with a majority distilled water and regretted it due to corrosion all over my cooling system.. I still need to flush it /sigh
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Old Sat, Jun-08-2019, 05:52:00 PM   #34
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Default Re: Overheating in Traffic—Aftermarket Radiator Daily Performance

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For what it's worth, Koyorad ships with a big warning saying that using water wetter or similar products will void the warranty.
Yep mine came with this warning. I’m running 80/20 mix and so far it’s working good.


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Old Sun, Jun-09-2019, 05:16:58 AM   #35
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Default Re: Overheating in Traffic—Aftermarket Radiator Daily Performance

Running only a Spal puller w/CSF radiator. My needle never goes above center. I also completely overhauled the cooling system.
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Old Sun, Jun-09-2019, 05:48:01 AM   #36
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Default Re: Overheating in Traffic—Aftermarket Radiator Daily Performance

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Originally Posted by Fresh1179 View Post
Trust me guys, I’ve been running the heat in my black on black car in 85-99 degree heat. I’m not too happy about it. It seems like there is no consensus on the best setup. I’m going in there to replace everything from a maintenance standpoint anyways in the cooling system. I’m just trying to determine which radiator/fan setup I’m going with. IN AN ABUNDANCE OF CAUTION, and with the knowledge that the car will see the track in high ambient temps, I’m going to go with a SPAL fan and a new aftermarket radiator, probably the Koyo or CSF radiator, most likely the Koyo. I’m also going to switch up my coolant ratio.


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Old Mon, Jun-10-2019, 01:07:48 AM   #37
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Default Re: Overheating in Traffic—Aftermarket Radiator Daily Performance

Seems like a capacity issue to me if the fans are operating as intended. Either water pump not cycling the fluid effectively or rad has lost quite a bit of efficiency - or maybe both. As others have suggested, properly functioning oil cooler can help bring down water temp, but seems to me that refreshing rad/pump maybe a good start.
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Discussing Overheating in Traffic—Aftermarket Radiator Daily Performance in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)