Does the drain plug requires a special tool to open or is mine broken off? I had work down on the front end recently at the dealer. Yesterday I tried to drain some coolant to replace my thermostat and found there is just a 3/8 inch plastic nub for what I assume is the drain. It seems to have an odd shaped slot that could conceivably accept some type of special tool but no way to otherwise turn it. I suspect the mechanic broke it off and it just left an odd shaped stub. Also, my coolant looks to be about 20 % dexcool and 89% water!
Thanks in advance