Petrol engine noise on cold starting

[Steve locke]

Hi, hope someone can help, my 2012 insignia 1.8 petrol has developed an engine knock/rattle when starting from cold,

this only last 2 or 3 seconds then clears it had oil and filter changed only 4K ago ,any help welcome,thanks Steve 

 

[AndyR]

Hi Steve, I've had the same recently with my 1.6 Astra. I put it down to the car being parked outside, and the fact that it has been colder than usual, so the oil is needing a little longer to get circulating on a cold morning. But once its been ticking over for a few minutes, it quietens down and is sweet as a nut from there on. 

Andy.