Discovered that the coolant expansion tank has gone from this in November.
View attachment 118183Too looking like this today.
View attachment 118184
I've had to top it up every week since November.
However the oil in the coolant is my main concern.
I think the oil filter housing to block oil seal has failed. I've ordered a replacement, which I'm hoping will cure the problem.
After many attempts to find the leak. I've noticed the block is wet below the filter housing. So I'm betting that's where the problem is. The previous owner had the same problem and was told to change the cooler. The cooler is new, but oil transfer and coolant loss remains.
So I have just a coolant leak, and the oil is residue from the previous failed cooler. Or the cooler was fine and the seal to the block was the original problem.
I'll see once I've done the seal change.
Bloody Germany rubbish. Give me a British engine any day.