Car will turn but it wont kick over? and it doesn't sound healthy when trying to kick over. I was thinking timing belt, just because i purchased the car when it roughy had 250k on the clock, it now has 320k and i havent changed the timing belts

Tommorrow im going to take the covers off and see if theres a broken belt?
I've had a lot of bad fuel/spark problems, where the car wont kick over, this time i think its something a bit more though as the big thud and it really doesnt sound like normal when trying to kick over?