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DIY: Do It Yourself
Post here to share or improve your wrench turning skills! All BMW E46 DIY tips, tales, and projects discussed inside. Learn to work on your car and know the right BMW parts you will need!

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Old 11-07-2007, 03:30 PM   #1
sstainba
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antifreeze/coolant ?

My coolant light came no and I was wondering what brand of antifreeze I should use... ?
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Old 11-07-2007, 03:47 PM   #2
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BMW Coolant - it lubricates the water pump, and so is a little more crucial to stick to OEM here.

If your car is swallowing fluid a little fast, your pump is probably on the way out, same way mine is.
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Old 11-07-2007, 04:24 PM   #3
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eh... i haven't put fluid in it in over 2 years. i'm not worried about the pump.
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Old 11-07-2007, 07:18 PM   #4
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Quote:
Originally Posted by 977 View Post
BMW Coolant - it lubricates the water pump, and so is a little more crucial to stick to OEM here.

If your car is swallowing fluid a little fast, your pump is probably on the way out, same way mine is.
oh damn, i didn't know it lubricates the water pump.

i'm just running water and some water wetter.
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Old 11-08-2007, 10:40 AM   #5
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Do yourself and the car a favor - flush the cooling system, including the block drain under the exhaust manifold, and refill with a 50/50 mix of BMW coolant and distilled water only.
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Old 11-21-2007, 11:55 PM   #6
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Quote:
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eh... i haven't put fluid in it in over 2 years. i'm not worried about the pump.
You should be, BMW water pumps are notoriously bad.

Use OEM BMW Blue coolant only with a 50/50 distilled water coolant mix. You can also add water wetter as well if you like.

Regular antifreeze is to corrosive and you will notice that the Tstat and the water pump will being to go after using it. (Not overnight but will definitely shorten the lifespan especially of the Tstat with its plastic housing).
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