cheers guys, so the general consensus is that my engines fucked. strange thing is is it starts and runs ok, i only checked it beacause it was, apparently, not as fast as someone elses. i did have doubts about a burnt inlet valve though, because when i ran it without any intake pipes i could hear some popping back through the throttle body. i know whats caused the engine to go so fucked though. the last owner told me that when he got it, it still had a japanese oil filter onit. the car came to the UK four years earlier. so 4 years on the same oil and filter does no good to any engine. Its already had a set of big end bearings so i might chuck a set of rings in and do the valves. Otherwise, if its too worn to repair ill get a 5e engine to put in.