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The BMW Range
3 Series
E46
water spare tank
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<blockquote data-quote="jarance" data-source="post: 359171" data-attributes="member: 21"><p>The ATF is for the hydraulic power for changing the automatic gears in the tranny. It is driven by a hydraulic pump in the gearbox. When ATF or oil is compress, it will generate heat hence you need to cool the ATF oil. The ATF oil is cool via 2 pipes which circulate the oil from the pump to the ATF cooler and back to the oil sump. </p><p></p><p>The radiator serve 2 functions.</p><p>1. To cool the engine via water/heat transfer</p><p>2. to cool the ATF.</p></blockquote><p></p>
[QUOTE="jarance, post: 359171, member: 21"] The ATF is for the hydraulic power for changing the automatic gears in the tranny. It is driven by a hydraulic pump in the gearbox. When ATF or oil is compress, it will generate heat hence you need to cool the ATF oil. The ATF oil is cool via 2 pipes which circulate the oil from the pump to the ATF cooler and back to the oil sump. The radiator serve 2 functions. 1. To cool the engine via water/heat transfer 2. to cool the ATF. [/QUOTE]
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water spare tank
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