Here's why:
* Engine Mounts: The 3.2L engine will have different mounting points than the 2.7L. You'll need custom engine mounts fabricated or extensively modified.
* Transmission Compatibility: You'll need to ensure the transmission from the 3.2L engine is compatible with the Sebring's existing transmission or find a compatible transmission and adapt it. This often requires custom modifications.
* Wiring Harness: The wiring harnesses are completely different. You'll need to either extensively rewire the entire vehicle or find a harness from a 3.2L equipped Sebring (if one even exists with the same year and other options) and adapt it – a massive undertaking.
* Computer/ECU: The engine control unit (ECU) is incompatible. You'll need the ECU from a 3.2L Sebring and possibly have it programmed to work with the specific vehicle. This is a major hurdle.
* Exhaust System: The exhaust system will need modification or replacement to fit the larger engine.
* Cooling System: The cooling system might need upgrades to handle the larger engine's heat output.
* Other Components: Many other components might require modification or replacement, including but not limited to the intake manifold, airbox, driveshafts (potentially), and more.
In short, the amount of custom fabrication, wiring, and potentially even bodywork required makes this swap a project better suited to a professional automotive shop with extensive experience in engine swaps, and even then, it would be a very costly and time-consuming endeavor. The cost likely would far exceed the value of the vehicle.
It's almost always more economical and practical to either repair the 2.7L engine or find a used 2.7L replacement engine.
