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E34 - 535i - Coolant Change - Engine Block Plug

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Hello All, 


Is there a way to drain the coolant from the engine block without removing the drain plug?


I drained the rad today but after 30 year and 200k I'm thinking the smart man doesnt go disturbing a rusty metal bolt in the side of the 30 year old 200k engine!


Is there another way to do this?





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