We are a small rural water company and have a CAT 125kW Generator that has overheated and seized. The repair tech that works for the dealer came out and recommended that we replace it, as the engine probably needs to be replaced because it overheated and has now seized. He didn't take it apart to confirm this. He had a sales rep. come out the same day to take a look at it and they quoted $21,706 for a new one. After some push back from us, they sent the repair tech's supervisor out who also said the engine would need to be replaced even though he didn't take it apart either... He then quoted $16,958.28 for an Engine Overhaul with Caterpillar Remanufactured Long Block. I'm still not convinced that the engine is the problem but admittedly know nothing about generators, engines etc. I just want to ensure that this dealer is being straight with me. Unfortunately there are no other dealers nearby to confirm this and after many calls, no one in the area seems to work on these CAT generators other than the dealer I am working with... I have told the dealer that I want a quote to troubleshoot the problem before we replace, repair or anything else. They said they are sure it's the engine and I would be paying at least $2000 and probably more in labor to take it apart and troubleshoot the problem, but they are willing to do that if I insist. So, the question is... what are the chances that the engine doesn't need to be replaced and that there is a less costly repair to fix it? Please help, thanks!