How do I determine for sure if its my main seal leaking on my 318. It drips a lot of oil after it warms up really good. When I look underneath it appears to be leaking from both rear corners of the oil pan. I have felt behind the valve covers and I dont think its coming from there.
Also do you have to remove the crank to replace the rear main on the 318.

 

you don't have to remove the crank. just need the right tools. i would say it is hard to tell if it is leaking. you should try washing your oil pan good to try locating the leak. i know i have tried locating a leak on the oil pan and it was almost impossible to find while it was on the truck. i took one off my 91 and got it brazed and more holes seemed to show up.

 

Is the only tool I need that is special is "No. KD-492". I belive you said that in a diffrent post.

 

i believe that would be the tool.