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The BMW Range
3 Series
E46
A question on expansion tank
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<blockquote data-quote="jarance" data-source="post: 336906" data-attributes="member: 21"><p>yes, it is the reserve tank for the radiator. Due to the design, the tank is clipped onto the side of the radiator. Being plastic, they tends to failed due to being exposed to heat.</p><p></p><p>You will also hear of story of expansion crack and result in rapid loss of coolant and cause your engine to overheat.</p><p></p><p>18,000 M is relative low. If you need to top up water in the radiator every week, then this is the sign to change rubber hose and the expansion tank cos they will start to fail one after another. So the answer is NO.</p></blockquote><p></p>
[QUOTE="jarance, post: 336906, member: 21"] yes, it is the reserve tank for the radiator. Due to the design, the tank is clipped onto the side of the radiator. Being plastic, they tends to failed due to being exposed to heat. You will also hear of story of expansion crack and result in rapid loss of coolant and cause your engine to overheat. 18,000 M is relative low. If you need to top up water in the radiator every week, then this is the sign to change rubber hose and the expansion tank cos they will start to fail one after another. So the answer is NO. [/QUOTE]
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