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Another question, does anyone know the size of the crush washer on the M57 engine block drain plug?
Also, I plan to drain all the coolant (at engine block and radiator), then re-fill to the top with de-ionised water only and do the 12-min venting/bleeding procedure as this will let the water travel through the system.
After that, I plan to drain the de-ionised water (at engine block and radiator) and then re-fill with new coolant (50/50 coolant/water) mix. My question is whether I am right to just re-fill to the top with 50/50 mix or should I take more care as to what ratio/mix I re-fill with?
Thanks everyone.
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