Look on the exhaust side of the engine block before the front axle.
E46 engine coolant drain plug.
Bmw e46 330ci m54 3 0l radiator drain plug.
Make sure the radiator isn t too hot then slowly open the radiator cap again with your face pointing in the other direction open and remove the big bottom blue drain plug again loosen the smaller blue drain plug and then loosen the top bleed vent screw again.
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I am aware that the radiator has a drain plug but that seems like it would only drain a portion of the system.
On my 325xi it would take a 18 inch extension with swivel socket.
Does anyone drain coolant from system thru engine drain plug.
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Leo your bmw s coolant should be blue bmw type sometimes referred to as cool blue common with some merc and volvo spec fluids.
Using either a 1 4 ratchet or a larger pivoting head ratchet slightly loosn the 13mm bolt until you can loosen the rest of it by.
Then wait for all the water to drain out it may take about 10 minutes.
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Usually stripped out after being removed brand.
Coolant left in the bottom of the overflow tank is normal if you do not remove the engine drain plug s well as the radiator drain plug.