yeah that sounds like it. it seems to be more noticable at about 2500rpm and if i hold a steady speed, it sounds like spanners in there rather than a regular knock.
Ive had a quick search for engines and can only find ones listed as "short". would mine be a short or are they all short ? mines a 94 jap import WRX GC8C48D.
this is what i'm looking at as a replacement at the moment, but i wont have the cash till next year:-
http://www.grahamgoode.com/subaru/pa...60&item=GGS918