^^^ naughty
always think the worst lol
you probably just have air in the system you need to burp out.. if it doesn't have any other symptoms of a bhg then try that first... once you've done that see how you go
to burp your car
put it up on ramps or a steep hill etc... don't drive far as you need to take the radiator cap off and i'm sure you don't want to wear the water in your radiator
sooo
car is on uphill angle so the radiator is the highest point of the car
take off radiator cap
start car
turn your heater on full blat
get bottles of water and wait for your car to warm up
keep filling the radiator till the bubbles stop coming to the top
once bubbles have stopped put the cap back on
and see how it goes
good luck with the gurgle