Oil in my coolant
I changed my thermostat yesterday (as it was stuck in the open position) and when I filled up the expansion tank I noticed there was what looked like emulsified oil in it. It was around the inside of the tank at the water line (not thick) and there were small blobs floating on the surface of the water.
I have no words to describe how gutting this feels. I have done a bit of a search on here and can see that some people consider small amounts of oil in the v6 expansion tank to be normal, and I do recall finding similar in the expansion tank of my 156 when I got it. I do wonder if the floating bits in the tank were caused by the draining and refill process dislodging the crap from the side of the tank, there wasn't anything floating in the tank when I picked it up or 120 miles later.
I suspect in this case the best thing to do is to flush the system and clean the tank and see if it comes back, I don't know how hopeful to be on this although when I took the stat out the coolant was clean and didn't have anything in it.
I also know that it entirely possible that someone managed to get oil in there whilst filling it up, and someone else told me that it could be sludge from people mixing coolant types.
If the worst comes to worst I see that its between £650 and £800 to get a garage to do the job, or if I can find the time I can always DIY ( in a Haynes style pull everything off, change gaskets, refit is reverse).