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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 Tue, Oct-30-2018, 10:11:47 PM   #1
Jaredomin
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Default oe vs koyo rad

doing a cooling refresh,
do I gain anything with spending the extra $100?
tia
car will see autox/some track days
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Old Tue, Oct-30-2018, 10:39:05 PM   #2
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Default Re: oe vs koyo rad

if you dont plan on doing any heavy tracking, just go OE.
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Old Tue, Oct-30-2018, 10:50:58 PM   #3
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Default Re: oe vs koyo rad

Take a look at specifications and ask yourself if it's worth the $100.

Is $100 worth the improved radiator cooling efficiency, increased coolant fluid capacity, and reduced coolant temperatures?
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Old Tue, Oct-30-2018, 11:21:00 PM   #4
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Default Re: oe vs koyo rad

Quote:
Originally Posted by Good View Post
Take a look at specifications and ask yourself if it's worth the $100.

Is $100 worth the improved radiator cooling efficiency, increased coolant fluid capacity, and reduced coolant temperatures?
I think it would be worth it.
But good intent and real world results are far apart.
Looking to hear some first hand expierence.
And yes i have read all the koyo threads already.
I also know theres alot of pro oe rad aswell.

Radiators for life from fcp aint bad either
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Old Tue, Oct-30-2018, 11:29:48 PM   #5
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Default Re: oe vs koyo rad

Quote:
Originally Posted by Jaredomin View Post
I think it would be worth it.
But good intent and real world results are far apart.
Looking to hear some first hand expierence.
And yes i have read all the koyo threads already.
I also know theres alot of pro oe rad aswell.

Radiators for life from fcp aint bad either
I would go with the cheaper of the two - they're pretty close in performance.

CSF oil cooler seemed to help most with overall temp, personally
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Old Wed, Oct-31-2018, 01:29:57 AM   #6
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Default Re: oe vs koyo rad

Even if you track, a new OE does just fine. People overheat because they have a 100k+ old radiator most of the time. Put a brand new OE radiator on mine and haven’t overheated on track or street
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Old Wed, Oct-31-2018, 01:40:36 AM   #7
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Default Re: oe vs koyo rad

all of those plus eliminating the chance of the plastic part cracking? koyo is a reputable radiator company. can't go wrong w/ them
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Old Wed, Oct-31-2018, 08:23:44 AM   #8
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Default Re: oe vs koyo rad

I prefer OEM. The Koyo slowly got heat creep at the track.
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Old Wed, Oct-31-2018, 05:35:51 PM   #9
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Default Re: oe vs koyo rad

I'd go new stock.
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Old Thu, Nov-01-2018, 12:44:48 AM   #10
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Default Re: oe vs koyo rad

New OE Radiator is my recommendation as well, unless you're going to go all out for a Zionville (but even then, in your application, totally not necessary at all). The 46M radiator doesn't have any issues with the plastic cracking like the non-Ms....and the OE Radiator is plenty fine for cooling in even the most demanding conditions. This car doesn't have problems staying within temp. At least not until you add FI.
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Discussing oe vs koyo rad 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)