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Got a 2000 Polo 6n2 1.4 8v
The engine seems to be running a bit odd, its very loud, sounds like a proper diesel and i dont think its putting out as much power as it should,
it was like this since i bought it but i always left it as a few people told me its quite typical for these mpi 8valvers to sound like that, but now its getting on my nerves a little bit.
I read online and some people said the pistons are slapping? and also it could need new tappets?? I havent tried the engine flush which should quiet down the tappets?

Just some advice needed on what it could be and if there is anything serious i need to worry about?

Cheers in advance

The tappets can be quite noisy, but thats normally only on the 16V blocks and not the 8V versions

Give it an oil change with some 10W40 - its possible it has a 5W40 or 5W30 syntehtic oil in which will make the engine louder

Engine flush, an oil change, and some Wynns Hydraulic Valve Lifter Treatment should quieten it down a treat

Oh nice one mate,
I will do definitely do this and see how that goes down.
Helped a lot, Cheers