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4th generation of BMW's popular 3 Series line of sedans and coupes.

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Where is coolant leak coming from?

Leak is not coming from water pump, radiator hoses, or coolant reservoir tank. The coolant is leaking from above my power steering. Is leaking into power steering. Car can’t hold coolant at all, it all drains out once you put coolant in.

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@jayhb45 what year and exact model is it? What have you checked?

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2005 330i. I have checked the water pump, radiator hoses, coolant reservoir tank, and thermostat

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You checked the block for cracks and the head gasket?

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Expansion tank I have replaced mine twice they split at the seam rockauto.com $25

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Jay will be eternally grateful.
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