Originally Posted by Ceeker
remove tranny lines from the rad. Put some Teflon tape around the threads and reinstall.
then check for leaks. otherwise your tank might be leaking so therefore you may need to change the rad.
Again, this is NOT an E30!
The E36 has an external transmission cooler that is NOT part of the radiator.
Best thing to do is clean it off, and check exactly where the leak is from. The lines have rubber seals that can go bad. Change them and see what happens.