116d 3 cylinder engine noise question

Would not drive it tbh !

I am not intending starting again unless I have to drive to a garage. But worried about further damage

Anyone? Ideas please

Any error codes?

I’d get that recovered to a garage. Don’t drive it anywhere. Sound serious.

I’ve got a guy with a code reader coming round to see if there’s any codes.
as it sounds like it drops partially on1 cylinder when it rattles I have a feeling it’s an injector. Will let you know what I find

It’s actually the belt tensioner making the noise. It is moving quite a lot? I have removed the belt but all the pulleys seam to turn smoothly.
The tensioner spring was strong and needed a good lever to remove the belt
Any ideas please?

Was the belt on properly, correct order/orientation etc.?

Is it the AC compressor/alternator pulleys? Those might seem fine when the engine isn't running and their clutches are disengaged.

Didnt sound like a big end bearing, or injector because wasn’t in a fixed interval. Looks like a pully or tensioner, a mechanic would be able to find the cause.

The new tensioner seems to have sorted it.

cam chain tension or aux belt ?