bad hesitation on my new mkII

[SolidStateS15]

i think i found the problem. the timing is really bad, umm the crank pully bolt wasn't even tight at all so it's been spinning on it's own and throwing off the timing. so now i just need to strip it all down and set it right. just sux on this thing because there is too much crap in the way so u have to remove it all. gonna take longer to remove all the belts and fan then to set the timing itself . i just hope there are no bent valves, is this an interference engine? that could also explain the loud tapping when the engine did run, i though it was just the HLA's but it could be valves.