You need to make sure that the engine isn't froze up for some reason. I would start with using a socket and ratchet on the crank bolt and make sure you are able to turn the engine over, if you can't then you're looking at pulling the engine to figure out why it's locked up. The other thing is that if the bendix gear meshes too tight with the flexplate that could break a starter nose as well. About the only way that would happen is if you're buying rebuilt starters. When a starter gets rebuilt the company building them machines the mating surface of the starter nose which now puts the bendix gear closer to the flexplate and after a couple rebuilds you end up with issues. I only buy NEW starters because of this and besides a NEW starter isn't much more than a rebuilt POS.I had to replace my starter on my 94 caprice cause the nose of the starter broke off. I put on the new starter yesterday and it wouldn't start. It sounded like it wanted to but the starter seemed to not be working with the flywheel. I put on jumper cables just in case the battery was low in the caprice. Then I even put in my Truck (Yukon SLE) battery in and tried it. Nothing!!!! So I quit out of frustration. Today I go to take another stab at it and noticed this new starter had cracked and another turn of the key it broked completely off again. I don't want to keep buying starters. Anybody have a idea of whats going on??? Thanks in advance!