I just changed the lid on my overflow bottle,because we thought it was not sealing properly and causing a small amount of water to leak out the top.
The new lid feels tighter, but it appears to be doing it still. Checking the bottle after a drive reveals a small amount of coolant ontop of the bottle. Note: None is comming out of the overflow line.
What could be causing this? Is it still not sealing properly? Or could it have somthing to do with my radiator cap?