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E34 (1989 - 1995)

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  #1  
Old 08-07-2015, 04:39 PM
Chinedu535i Chinedu535i is offline
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Concentrated Antifreeze/Coolant vs. 5050 Coolant

greetings fellow Bimmers:

I conjured a thought about antifreeze earlier today. understanding that 5050 coolant/antifreeze is required according to the driver's manual. however, my thought was would it be wise to mix some 5050 antifreeze/coolant with straight concentrated coolant fluid? I'm wondering if the mixture of concentrated coolant will in result make the engine run cooler during its proper heating temps while driving? just a question I thought of earlier, and looking for input if this is a wise choice to make, and or if there's any other options to include on the E34 to involve cooler air intake directly to the engine.

thanks in advance..
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  #2  
Old 08-07-2015, 05:33 PM
south26 south26 is offline
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No.

Sorry just use the 50/50

If you want it to run cooler, just run a cooler thermostat. Are you having problems with it over heating? If not then it is doing what it is suppose to running near the middle.


Andy
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  #3  
Old 08-07-2015, 05:53 PM
Chinedu535i Chinedu535i is offline
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thanks...
on the other hand, have you tried running a cooler thermostat, and if so, how has that worked out you?
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  #4  
Old 08-07-2015, 06:14 PM
south26 south26 is offline
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I have not tried running a cooler thermostat because I have not had problems with my cars over heating. Now I did have a 79 320i that had a stuck open thermostat which caused the car to never completely warm, this lead to me wearing long johns in the winter until I figured out what was the problem (no heat = no heat) I am surprised that my girl friend at the time dealt with it and in the end married me.


Andy
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  #5  
Old 08-07-2015, 06:18 PM
Chinedu535i Chinedu535i is offline
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thanks Andy
lol! (no heat =no heat), and the lady still married you, I like that.
enjoy the weekend, thanks for the information.
go Bimmers...
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  #6  
Old 08-07-2015, 07:36 PM
Eero Eero is offline
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Use 25% antifreeze and 75% distilled water. Less antifreeze=better cooling, but you cant go 100% water. Be aware winter if freezing temperatures are possible.
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  #7  
Old 08-07-2015, 07:40 PM
Chinedu535i Chinedu535i is offline
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thanks for the heads up, enjoy your weekend
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  #8  
Old 08-07-2015, 08:02 PM
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E34ZombieHunter E34ZombieHunter is offline
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Quote:
Originally Posted by Chinedu535i View Post
thanks...
on the other hand, have you tried running a cooler thermostat, and if so, how has that worked out you?
Depending on how much cooler a thermostat your gas milage will suffer, when cold the computer adds more fuel to get to operating temperature faster and adding a cooler thermostat makes the computer add the extra fuel for a longer interval.
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  #9  
Old 08-07-2015, 08:11 PM
Chinedu535i Chinedu535i is offline
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hmm, you know, that make logical sense, thanks.
I think I'm just going to leave it as is by using the 50/50 coolant-antifreeze mixture. thanks for the feedback though, much appreciated. enjoy your weekend.
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  #10  
Old 08-07-2015, 10:58 PM
Biasvoltage Biasvoltage is offline
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Water is actually a more efficient coolant than the antifreeze - the antifreeze is there to lower the freezing point of the water so the block doesn't crack at 32F (it also contains some anticorrosive additives, etc..)
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  #11  
Old 08-07-2015, 11:22 PM
Chinedu535i Chinedu535i is offline
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thanks for the information
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  #12  
Old 08-08-2015, 04:29 AM
paul1733 paul1733 is offline
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I agree with the 50/50 mix & genuine BMW coolant, which is a conentrate.
First pick. The bottle
Second pick. If you notice the bottle on the right, which is 4 years old, has 3 mix ratios. The bottle on the left was was bought 2 weeks ago & now has only 1 recommeded mix ratio. You have a M30 engine so you will need 4 1.5L bottles to fill your 12L cooling system at a 1:1 mix ratio, i paid about AU$14 for 1 bottle.
All i know is when i bought my second E34 7yrs ago, with a busted timing belt, a "BMW mechanic" fixed it & pretty sure he put a real low mix ratio in because here we rarely see below 0C. 2yrs later the head gasket went, fixed it myself with a 1:1 mix & 5yrs later still going with the same coolant pump & thermostat installed 7yrs ago when it got rebuilt. The reason i got another bottle is im about to do my timing belt & i needed 1 more bottle to to join the other 2 bottles i have to fill my M20 cooling system.
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  #13  
Old 08-08-2015, 07:15 AM
u3b3rg33k u3b3rg33k is offline
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Originally Posted by Biasvoltage View Post
Water is actually a more efficient coolant than the antifreeze - the antifreeze is there to lower the freezing point of the water so the block doesn't crack at 32F (it also contains some anticorrosive additives, etc..)
The coolant also lubricates the water pump. There's really no reason to run a non stock mix unless it's a racecar.
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Although I have nothing scientific to say, I can confidently say that it works.
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