Here's why:
* Different Engine Mounts: The 2.7L engine will almost certainly have different mounting points than the 2.4L. You'll need custom engine mounts fabricated or sourced.
* Transmission Compatibility: While both engines might *seem* compatible with the same transmission (depending on the specific transmission in your 2.4L Stratus), there's no guarantee. The 2.7L engine may require a different transmission or significant modifications to the existing one to accommodate its different torque output.
* Wiring Harness and Computer: The engine control unit (ECU) and wiring harness are completely different. You'll need to either find a 2.7L harness and ECU, or attempt a very complex custom wiring job. This is likely the most difficult aspect of the swap.
* Exhaust System: The exhaust system will likely need modification or complete replacement to fit the 2.7L engine.
* Other Components: Other components like the air intake, cooling system, and possibly even the drive shafts might require alterations or replacements.
* Cost: The cost of the engine itself, plus the fabrication of mounts, wiring, and other necessary parts will likely exceed the value of the vehicle.
In short, while not technically impossible, swapping these engines requires a high level of mechanical expertise and fabrication skills. Unless you have considerable experience with engine swaps and access to the necessary tools and equipment, it's not recommended. It would be much more practical and less expensive to find a used 2.4L engine if your current one is beyond repair.
