After the last long distance I observed the following when checking the oil level when looking at the cooling water compensation tank: On the cooling water a light foam crown swam. No oily foam, no lack of cooling water, no missing oil. After 2 days of usual “cuddly ride” the foam was gone and there are only occasionally light bubbles in the cooling water tank. I never noticed that. My blacksmith told me that some bubbles and foam were passing through we are allowed to be and are normal, as long as no cooling water is missing and no oil film floats on top of it. I somehow suspected the head seal, but then cooling water should have been missing. Water level is as always unchanged and also no abnormalities. Do I hear the fleas cough? What does it look like with your solder carts? Have ever had bubbles in the container? Stefan