I'll check the valve tolerances, but... How do you truly tell lifter noise from piston slap from rod knock?
I have heard and seen that the Subaru engines are costly to rebuild, thats out of the question. However, a used engine is not cheap either. By the looks of Car-part.com the 99ish 2.2 is a very hot item. Closest one is in PA and is over $1000. Usually I have hundreds of local hits for every other vehicle I've had, but not this oddball POS...
Yes, you can on the 1999 2.2s they have a nut/adjuster thing not HLAs. What makes you think this could be valvetrain noise?
Did your car sound like this when it was piston slapping? Doesn't piston slap go away when the vehicle is warm? What is the proper way to diagnose what this noise is for real? Its driving me nuts...