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E46 (1999 - 2006)
The fourth generation 3 Series (E46 chassis) was introduced in 1999 and set the standard for engineering and performance during it's years of production including being named to Car & Driver's 10 best list every one of those years! ! -- View the E46 Wiki

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Old 02-12-2013, 07:34 PM
ffjgk ffjgk is offline
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Mein Auto: 2003 330XI
Coolant question

Does anyone know what type of coolant I should put in. I just changed water pump thermostat all hoses and tank. Just not sure what to put in for coolant, and any suggestion on how to flush the remainder of the system.
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Old 02-12-2013, 08:53 PM
RaiderBMW RaiderBMW is offline
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Location: Kansas
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Mein Auto: 2003 330i

I find a lot of information on the WIKI at the top of the page. Simply type in whatever challenge/question and it gives a ton of answers.

Here is the coolant one: http://www.bimmerfest.com/wiki/index...MW_E46#Coolant

You can also just search the threads with the question. I have seen a lot of "debate" on this.

Good luck!
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Old 02-12-2013, 10:17 PM
Jat007 Jat007 is offline
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Mein Auto: 325i, 328ci, X3
BMW Coolant. You can buy it online for fraction of the cost...
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Old 02-12-2013, 10:25 PM
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bluebee bluebee is offline
Seek to understand,^Value
Location: San Jose, California
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Mein Auto: 02 BMW 525i M54 auto 130K
Originally Posted by Jat007 View Post
BMW Coolant. You can buy it online for fraction of the cost...
What coolant you put in has more to do with your personality than your vehicle.

See details here:
- Fundamental BMW fluids decision-making religious camps (1) and algorithms specific to motor oil selection (1), coolant choice (1), & gasoline dogma (1)

For some personalities, the ONLY answer is the blue stuff.
For other personalities, the blue stuff is fine - but there's also that green stuff too.

(Yes, I know the 'color' is meaningless - but I'm making a general point here.)

Here's what we've composed for my M54 engine, for example:
- Coolant: Coolant, for engine, automatic transmission, power steering, and AC evaporator cooling (1) & bleeding (1) (2) (3) or refilling DIYs (1)

Engine coolant:
phosphate free (for Europe's high-mineral-content water), amine & nitrite/nitrate free (for USA long-life requirements), & low-silicate or silicate free (for Japan requirements) 50:50 mixture of ethylene glycol & water (the Bentleys say distilled water (Bentley 020-11), aka de-mineralized or de-ionized water, some call it purified water, and the BMW AG TIS 12.11.2007 18:56 specifies water with a pH from 6.5 to 8.0, maximum total hardness of 3.6 mmol Ca++/liter, maximum chloride content 100 mg/liter, and maximum sulphate content 100mg/liter; interestingly the BMW TIS says "potable tap water usually fulfills these requirements". EPA reports show San Jose & NYC tap water easily fulfill these requirements. The BMW TIS expressly states additives are not helpful and are not recommended. BMW lists a score of recommended coolants in their BMW AG TIS 12.11.2007 18:55 which meet the BMW N 600 69.0 standard, some of which are BMW PN: 1.5-liter; BMW PN: 1 gallon; Castrol Anti-Freeze NF; BASF Glysantin Protect Plus G48, & Havoline AFC (BD04); but most of which are not easily found in the USA. Many Bimmerfesters recommend BMW coolant; however other Bimmerfesters recommend Prestone Extended Life 5/150, Valvoline Zerex G-05, and Service Pro Universal Formula. Others (e.g., chiefwej, aioros), have tested Evans NPG+ but be aware propanol entails a different maintenance philosophy than the aqueous fluids listed above and is not compatible with them. [Total Volume: 1997 I6=10.5 quarts (2.6 gallons), 1997 V8=12.0 quarts (3.0 gallons), 1998-2002 I6=11.1 quarts (2.8 gallons), 1998-2002 V8=12.7 quarts (3.2 gallons), 1997-2002 V8 with latent heater=13.5 quarts (3.4 gallons)]. Prestone says the only reason for phosphate free is the extremely high mineral content of water in Europe - and that in the USA, it's not needed. Replacement Interval: Every three years (Bentley page 020-9) or every four years (aforementioned BMW AG TIS) starting from date of manufacture (except for M-Power vehicles which have 3-year intervals). Note: Mixing BMW-recommended coolant brands is permissible; but mixing types is not permissible unless it's an emergency.
Please read the suggested threads and add value, either by pictures or by descriptions, so the next person stands on your shoulders.
See also: E39 Bestlinks & How to easily find what you need
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Old 02-15-2013, 05:21 PM
HarryR325i HarryR325i is offline
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BMW Coolant and mix it with distilled water (50/50 mix).
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Old 02-15-2013, 06:51 PM
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SJBimmer SJBimmer is offline
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Originally Posted by harryr325i View Post
bmw coolant and mix it with distilled water (50/50 mix).
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