I have a coolant leak under the oil pan. I tried tracing up but could not locate any hose nearby with any problems. The heat of the engine burns up coolant and the smell goes out from the hood. It seems that it leaks worse when the heater is on. The leak is small and now the smell is going inside the car a bit. The coolant reservoir was a bit low and I added more to it. When I do not use the heater it seems to stop the leak. What is this? The photos are from the front of the oil pan all the way up .
The picture with the red mark means the front of the block where I can see the leak at.