Is it normal

[reaper1064]

After a drive today when I pulled up I could hear a noise coming from the expansion bottle. It was either a bubbling or filling noise, not sure which. The engine is not overheating at all. Was nothing that I had heard before.

[shokenore]

Yes
Probably
The rad cap lets some coolant out into the expansion tank and as the engine cools it lets some coolant be sucked back in to fill the partial vacuum as the block and thus the coolant cools and contracts.
Keep an eye in coolant levels though

[reaper1064]

Cheers for that mate.