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Old 01-22-2010, 10:25 AM   #1
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How much coolant?

Can anyone tell me exactly how much coolant a 2000 328i should take? I need to flush my system and need to know how much to add. I wasn't able to find it on another post.

Thank you!
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Old 01-22-2010, 10:28 AM   #2
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check your manual. it should have capacity specifications in there.

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Old 01-22-2010, 10:29 AM   #3
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i tink its 2 gallons or 3 gallons.... dont take my word for it though

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Old 01-22-2010, 02:32 PM   #4
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Buy one gallon of undiluted coolant, and two gallons of distilled water. The exact amount for the refill varies, because you don't know exactly how much remains in your engine after you drain it. Total capacity is printed in your owner's manual, but you'll need slightly less than that because you don't get out every last drop when you drain it.

There's a metal drain plug on the passenger side of the block. Ideally you'll replace the crush washer under that drain plug (I didn't).
There's one blue plug on the bottom of the radiator.
If you have a manual transmission, there's a second blue drain plug on the bottom of the expansion tank. (for automatics, you instead have a transmission fluid cooler on the bottom of the expansion tank)

Pour in half the gallon of coolant, pour in half a gallon of water, then pour the remaining half-gallon of water into the coolant jug. Then pour from that jug until it's topped up properly. If you have too much, mark the jug with a Magic Marker "50% PRE-MIXED" and store it for future top-ups. If you have too little, top up with more distilled water.

DON'T OVER-FILL! Fill it so that the floating stick gauge reads halfway between "min" and "max."

Last edited by nathancarter; 01-22-2010 at 02:34 PM.
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