my emgine mounts come loose every few weeks but nothin else,
and about a week ago had same sort of noises but at bout 70mph fcuk i thought pulled over stopped checked what i could see in the dark,
thaought had chunks of piston in block or somethin.
turned out aux belt had jumped slightly and torn two ribs off the belt and they were slappin all over engine bay.
my advice if ya dont know about engines just take it to a garage.
it could be simple could not be.
Simple to find out how bad though.
1. does it still drive the same?
2. does the noise go on harder revs?
3. what side of the engine bay?
4. Fluids under car/on road/drive/in engine bay/ on the under engine shields?
5. Any other noises before it went clunky or any new noises.