That's a copy of your original post, and I more than answered your questions already. The engine had to have been repaired properly. As proof, the engine ran okay when you test-drove it before buying it and for two weeks. If something had been done incorrectly, you would have noticed that right away and not bought it. I would need a couple of hours to list all the things that can go wrong with a car that mechanics and salespeople have no way of knowing are going to occur. Of course the mechanics are always to blame for not being able to foresee those things. The dealer, on the other hand, gives you some type of warranty in case something unexpected does happen. If they could be sure nothing would go wrong, there would be no need for a warranty.
The best advice I can offer now applies to any car with an interference engine. Every manufacturer spells out a recommended replacement interval for the timing belt. Some brands have a history of the belts breaking before that mileage is reached, resulting in an expensive valve job and cylinder head gasket repair. Some brands go a lot longer than their recommended interval so people get complacent and get caught with a broken belt that was ignored for too long. Some brands, like Chrysler, have an Engine Computer that will shut the engine down to protect the valves if the timing belt jumps as little as two teeth. I'm sure there are a few other manufacturers that do that too, but that still won't protect the valves if the timing belt breaks.
You are also supposed to replace any tensioner and idler pulleys when replacing the timing belt, and any tensioning devices. Some of those are just spring-loaded pulleys, and some are little pistons that fill up with pressurized engine oil to hold proper tension on the belt. On a lot of engines the water pump is also driven by the timing belt. No conscientious mechanic who has your best interest at heart will agree to replace just the belt without all those other parts, and you don't want to work with a mechanic who would cut corners like that. Those parts provide the insurance you're getting a quality repair service. You and your mechanic don't want a $2000.00 engine failure because of a failed bearing in a 20-dollar idler pulley or a 50-dollar water pump
Sunday, June 21st, 2015 AT 10:22 PM