Any mechanics able to identify engine issues by sound?

[B-1]

Like the others said its coming from worn lifters, rocker or cam lobes or a combination of them. 200K is a good amount of mileage though so it will likely need a rebuild at this point or your just going to be doing things one by one for a while.

 

[pinball wizard]

It's a 2008 Opel Astra 1.8 OPC Sport so it is getting on in years.

Pulled through it's arse, you mean? I see you have OPC and Sport in the name...

 

[Y'all Qaeda]

This is easy. By the sound of it, it's gone wrong. You need to get it to sound right again.
Issue identified by sound.

Seriously though, that sounds like kicking a skeleton eating corn down stairs.

 

[longboy]

At 200 000km it's about time to sell it and get a lower mileage in my opinion - BUT if you did belts and timing, pumps, major service etc... it will easily take you to 300 000km after you sort the lifters and take a look at the condition of the engine.

 

[TheChamp]

Pulled through it's arse, you mean? I see you have OPC and Sport in the name...

The OPC has always been a 2.0l iirc, I don't recall if there was ever an "OPC line".

 

[pinball wizard]

The OPC has always been a 2.0l iirc, I don't recall if there was ever an "OPC line".

Yikes, even worse, the OP has a 1.8 with a OPC sticker on it. Some boy racer's wet dream or something.

 

[marbro]

If I need the lifters replaced, is it a major and expensive job?

total should be under 4k, Its not something I would recommend doing at home,

Rather find a mechanical shop willing to do it for you.