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The BMW Range
3 Series
E46
Water "Disappearing" From Tank
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<blockquote data-quote="bimmer73" data-source="post: 452245" data-attributes="member: 1666"><p>BMWs have a self bleed system. When you fill your expansion tank to the brim and start your car, when the car warms up water will over flow out from the cap. That is very normal. If you change to a new cap you will gat the same results even if you have an entire complete new cooling system. IMO the culprit is a leaking heater core and/or a failed heater valve.</p></blockquote><p></p>
[QUOTE="bimmer73, post: 452245, member: 1666"] BMWs have a self bleed system. When you fill your expansion tank to the brim and start your car, when the car warms up water will over flow out from the cap. That is very normal. If you change to a new cap you will gat the same results even if you have an entire complete new cooling system. IMO the culprit is a leaking heater core and/or a failed heater valve. [/QUOTE]
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E46
Water "Disappearing" From Tank
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