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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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  #1  
Old 01-29-2015, 10:33 AM
gnik14 gnik14 is offline
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Mein Auto: 200 323i
Radiator flush

Iím going to do a coolant flush this weekend on my 2000 E46 323i. What is the correct way to flush? There is a drain plug at the bottom of the radiator, would draining from the radiator be sufficient, or do I have to drain from the engine block plug too?
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Old 01-29-2015, 11:01 AM
harleyrob harleyrob is offline
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Quote:
Originally Posted by gnik14 View Post
Iím going to do a coolant flush this weekend on my 2000 E46 323i. What is the correct way to flush? There is a drain plug at the bottom of the radiator, would draining from the radiator be sufficient, or do I have to drain from the engine block plug too?
You will need to drain from the engine block as well. Make sure you bleed the system really well after adding fresh coolant.

This link is actually for a "cooling refresh" but will give u guidance on coolant flush and fill. IF, you don't have something guiding already.

http://www.bmw330ci.net/maintenance/completecoolant.php
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Old 01-29-2015, 01:51 PM
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Put about 3 tablespoons of baking soda in a gallon jug, fill with hot water, shake well to thoroughly dissolve the baking soda, then use this to flush the system. This will help to neutralize any old deposits that have turned acidic over time.
New fluid should consist of 50% BMW coolant, and 50% distilled water....
Bleed thoroughly when finished.
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