I’m new here and first of all a warm “hello” to all Citroen drivers. As the title already suggests, it has caught me now, diesel smell in the interior of my 2005 C2 1.4 HDi. The workshop thinks that all injectors have to be changed. 2 injectors are coked and 2 are leaky. Price for this is at least 1500 euros with used injectors. Since I have time now, I would like to do this myself. And if it doesn’t work, I can still drag the car to the workshop. I have now read some things and instructions about it and I can understand everything. Have various tools at home. Rotation mo, ratchet etc. However, the following questions have arisen for me: 1. I have read that injectors can leak from the inside or from the outside. What does this mean? Can you fix both? 2. There are ceramic pastes for injectors. Is it helpful when installing the injecto? 3. Some write that you should let the engine run warm before you expand the injectors, some will definitely let me cool down. What’s better? Would I be very happy about answers, greeting you well?