MF 165 DIESEL 1966 - crankcase drain plug

I was trying to drain the oil of the engine of my tractor when I realised the drain plug had been weld... I do not know the reason... I asked several people what to do to remove the used oil. I have already received some advises, but could you give me yours before I make a mistake ? The weld is a big point between the crankcase and the cork, just on one side of the cork and a little drop of oil is coming out (around the cork). The level of the oil in the engine is good from few mounth so it is not liquing so much. What do you think about it ? The oil is dirty and I have no idea when they replaced it for the last time.

Gerald J.

my first idea would be to first use an angle grinder to get as much of the weld off as possible. then, with a hammer and a wrench i'd try to break it loose.

To thank you again ! I observed properly the drain plug and the weld. Paying attention to the seal damaged. In fact the weld did not touch the body of the engine (carter in french) So I decided to turn it to the right side unclockwise with a wrench and a hammer. I hit the wrench precausioly and the corck came out in good condition (good enough) because previous using damaged it on the top bolt. For this reason previous owner of the tractor weld a new bolt on the drain plug. I am very happy of that, I will do a good maintenance with new filters and new seals. THANKS.