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Go Back   E46Fanatics > Tuning & Tech > Driveline, Engine & DME Tuning

Driveline, Engine & DME Tuning
Talk about driveline improvements, NA tuning and DME tuning your E46 BMW here. This includes diffs, intakes, exhausts, chips, software and OBD tuning.

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Old 10-28-2012, 01:27 AM   #1
dwtaylorpdx
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Have you used waterless coolant in your BMW?

I simply want to know if anybody has run waterless coolant in their BMW E46.

I'm considering the Evans product, I've used it in heavy duty trucks, but that's a bit different than the BMW for load...

The reason is that you run zero pressure in the radiator with it, which I theorize means less pressure and stress on the system... (Good thing...) and its a lifetime product (I've seen trucks with literally millions of miles and 10 years on it.)

It seems like it should work fine, Have to figure out the best way to zero the system, I think the stock radiator cap could be drilled out to disable its pressure holding capability.

Anyway anybody used it?

Dave

Last edited by dwtaylorpdx; 10-28-2012 at 01:28 AM.
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Old 10-28-2012, 10:12 AM   #2
Hornung418
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You'll find that a 1 bar expansion tank cap is in production right now. While that may reduce stress on the system, the boiling point of the coolant is lowered, albeit not significant to worry about overheating while running 50/50 mix.

Interesting note about the Evan's product, it has a boiling point of 375*F and freezes at -40*F. So in theory you can still use the same thermostat and get the same fuel efficiency from a non pressurized system, without worrying about over heating or rupturing a critical cooling part.
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Old 10-28-2012, 06:58 PM   #3
dwtaylorpdx
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I think the neat part is the lack of pressure, many head gasket failures are also aggravated by pressure in the water jacket..
Downside is its going to cost 80 bucks to do... Hoping someone else has played with it! My 05 330 has 100K on it now and
I figure next cooling system service I could do a new radiator and hoses and go withthe Evans...



Dave

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Old 10-28-2012, 07:04 PM   #4
Hornung418
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Do it and document the results. If you run it pressurized I don't see the problem until you figure out a solution to the cap. You can't just take the Expansion Tank off so you gotta find a no pressure cap.

Sent from my DROIDX using Bimmer App
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Old 10-28-2012, 07:08 PM   #5
dwtaylorpdx
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I plan on keeping track of the mileage and drive the car, first my E36 then after I see some time on the parts, the E46 gets the taste... I'm mostly thinking about the aluminum..

Dave
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Old 10-30-2012, 01:09 AM   #6
E46_330_Ci
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So do we need i non pressurized cap ? my do this tomorrow with a new radiator im adding
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Old 10-30-2012, 01:43 AM   #7
zander271
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The PO switched to Evans NPG+ in my ZHP. He even gave me 2 spare bottles of it He also did a full cooling system refresh at 80, I'm at 100k now with no issues. It may extend the life of the cooling system by some but I'm not sure how much in the end. It's all plastic and rubber which the main enemy of these parts is heat and time.

I wonder if Mango will find this post!? It is cooling related.

Last edited by zander271; 11-02-2012 at 12:44 AM.
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Old 11-01-2012, 12:48 AM   #8
bobm3
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i use engine ice

hi-perf. coolant.... you put 6 bottles straight in your block..... i like it.. i use it to bring down the heat from my engine for the a/c.. it lower my temp i say a good 15 to 20 degree's...i also put in my car a 55 degree termst. and a clutch fan...i only used this stuff in the past year..... but i like it alot.....it help me in those few very hot daysin the upper 90'ies......sorry i can't give you more in sight of the ice......
bob
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Old 11-02-2012, 04:51 PM   #9
Jackcat559
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I used Evans for a little over a year now, with no issues
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Old 11-06-2012, 01:46 AM   #10
wes_rod
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So do u need a pressurized cap for use or a non?
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Old 11-06-2012, 05:58 PM   #11
Jackcat559
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Just the stock cap
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