I have a 7000 AC that leaks around the rear injector. I had all the injectors rebuild about ten hours ago. It runs perfect without any miss. It looks like it is motor oil leaking around the number 6 injector. It could be diesel but it looks like oil to me. I just put on a new valve cover gasket because I thought it could be that leaking behide the injector. It wasn't.
Someone told me to pull the injector and have it tested for leaks, but the diesel shop is a two hour drive. What can it be? Help.