help please
 

I'm about to buy a 95 integration and it doesn't run. The Guy I'm buying it from said he was driving to work and it started tapping. On his way home it got worse so he said he pulled it over and had it towed to not destroy the motor. Could this be just a bearing problem. He said it never smoked and it ran great before this. It has 75 k on the block from what he was telling me. He said he pulled the oil panand there wasn't any metal shavings present so that leads me to believe he didn't throw a rod...correct? Never owned one before so I need some help please. It does have a aem fuel rail and can gears and that's about all I can tell. I have thoroughly inspected the rockers and cans from what I could see and it all looked great. Is there anything else that can
be wrong?