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Took it back today doc spock said he cleaned it out but the oil/water mix is still inside the expansion tank albeit stuck on the top with a little gunge in the water itself .Maybe its me but i thought the expansion tank could have been removed and cleaned out proper or else the mayo is always gonna be stuck insideand visible.He also said to bring it back in a week or so and he will flush it out again.should i just tell him i want it cleaned properly?