Am I worrying about nothing..

[X5UK88]

I've started to notice my 4.6is is using a very small amount of coolant.

When first started I get a sweet fuel smell, I can't say it smells anything like burning coolant, but anyhow worth mentioning. It lasts all of a minute and doesn't smell like it again at any point until the next cold start, the following day or whatever.

I checked my coolant expansion this evening and saw accumulated around the red thing, lots of tiny bubbles. I also felt like the coolant had a slight film to it, but I had stuck my finger in the expansion after cooking with oil earlier and I've never ever noticed that before, so I don't think that's an issue. It was more the bubbles.

Here is a pic..



So I guess what I'm asking is, does anybody else notice a sort of sweet fuel smell on cold start from their M62? And should I be worried about the little bubbles?

Obviously I need to determine the source of coolant loss, but as I say it's very minimal.

All opinions welcome