Engine noise

[Porky]

Hi

I decided it would be a good idea to fit a magnetic sump plug / drain bolt. I have recently encounted some slight noise from the back of the engine and on changing the oil noticed filings on the sump plug !!!!. Obviously i have a problem. Has anyone else ??? Or could someone suggest anything please ???
Vectra c 2.2 direct. Z22YH engine. I always change oil and filter every 5000 miles with 5/30 fully synthetic for GM motors.

Thankyou for your time.

 

[vocky]

just keep an eye on things, sometimes it's just debris from a previous repair

 

[Porky]

Ok thanks but i always change the oil at 5000 miles and the filings were not there last time . Would it be a good idea to put some hydraulic lifter oil in ?? Maybe ones been sticking ??