Ford escort injector TD 1.8 year 98

Hello everyone !! I wanted to tell you a case that happens to me in the Ford Escort 1.8 TD car. The first injector, which is on the side of the distribution, submits liquid, by the part of the thread of èste and the cylinder head. I do not know what it is, because it does not smell Gasoil, and I am afraid to take it out and that it can be water because it is wrong, and the breakdown is greater. I tell you in case someone knew that it can be, if it is common in these cars, because it has 180,000 kms. Thanks in advance

The injector only carries the feeding tubes, which is the one that is threaded and the return, which is rubber, and by the two diesel circulates. Turn down the smell!