hi
ive got a problem with the tappets on 1.6 turbo. at higher revs the tappets seem to drain of oil and take a while to fill back up. i recently rebuilt the engine and checkrd the tappets when they were out and they were ok. i used to have this problem before i stripped the engine. ive got good oil pressure and running 10w40 oil. anyone had this?

 

sounds like your cams fucked mate..

 

If you have good oil pressure, then either you have a supply problem to the top end, knackered tappets or duff cam.
Out of these I would say if it has done any miles and the cam looks ok the tappets are shagged, they don't last forever even if they look good as new, you can't see inside them, which is where the adjusty bit is, it's only a tiny spring on that pushes a tiny ball bearing onto a seat to hold the pressure.
tabetha