Hi I have a 1995 e 300 diesel wich i like and have some issue here and there but car is great for me now I have got new project wich is 1992 300 sd with 275000 miles on it and brought the car on the trailer found out the bolt is broken for belt tensioner and the car smokes when starts .I chack the oil is not mixed with the coolent,question is to take the front cover and remove the broken bolt I have to take the oil pen out. thank you