Hi all I'm about to buy a polo 1.9tdi car... I've seen two that are almost identical, late 90s with I guess the AHU engine.

Both low mileage and seem good, one is better in some ways, the other in others...

One of them I noticed is tapping, and its clear it's from the injector pump.. The guy said its just the pump and its normal, but I'm sure the other one I saw didn't have the noise...

I've also had a few diesels with old bosch injector pumps and never noticed that tapping, only tapping with loose injectors etc...

Is it normal for the ip to tap with the piston moving up and down, or is it a sign of failure?

Also both rocker cover gaskets are leaking one around the right sensor, the other out of the middle bolt on the top, both just a simple gasket change?

Thanks!