My 1997's engine was replaced about 1800 miles ago with one from a sideways smashed deville with 23000 miles. I paid $2400 for it, which to me is very reasonable. About a week ago the starter started acting up. The starter was from the Deville engine, not my original one. It would just refuse to turn over. I could hear the relay click (near the fuses in the engine bay) but no solenoid click. This was only after a prolonged drive (1/2 hour or more). It would start after waiting 10 or 15 minutes. After a few days of very light use (I cut down on driving the car to a couple trips per day until I would have time to fix it) it simply refused to start after not being run for a day and a half. I pushed the car into my garage (they say this car is light? Maybe it is by Cadillac standards... But I guess 30' of pushing makes anythign heavy) and took it apart. The starter is an easy change. I put it back perfectly, the hardest part was finding the torque specs for the manifold bolts.
I swapped it with the one off my old engine, and it worked fine for a few more days. Now it has a new problem. When the key is turned to start, the starter operates, then does not cease to operate when the key is released. The starter motor keeps running for 3 or 4 seconds, then stops. It does not stop if put into gear while the starter is still turning but the engine is running.
My feeling is that it is stuck, physically, and the gear is not retracting from the flywheel. Does this make sense? Or could it be something else? It's somewhat cold here, and my garage is heated only by a kerosene machine, and takes forever to warm up. I would hope for some input before I go out there for an hour or two and take it apart again, especially as I cannot test it with the starter exposed.
Am I missing something? Perhaps I am drunk on coffee again?