It's possible but it's a complex and not-recommended project for most people. Here's why:
* Engine compatibility: The 2.4L engine is physically larger than the 2.0L, so it won't just drop in. You'll need to modify engine mounts, possibly the firewall, and potentially other components.
* Wiring and electronics: The 2.4L engine uses a different ECU (Engine Control Unit) and wiring harness. You'll need to modify or replace these systems to make the engine work properly. This is a highly complex task for anyone not experienced with automotive electrical systems.
* Transmission: The 2.4L engine may not be directly compatible with the transmission in your 850. You may need to swap transmissions, which adds another layer of complexity.
* Exhaust system: The exhaust manifold and downpipe are different between the 2.0L and 2.4L. You'll need to modify or replace these components.
Here's why it's generally not recommended:
* Complexity: The work involved is significant and will require advanced mechanical skills, specialized tools, and a good deal of time.
* Cost: Sourcing the engine, the necessary parts, and paying for professional help if needed can be expensive.
* Reliability: If the swap is not done correctly, you could end up with a vehicle that is unreliable and prone to problems.
Alternatives:
* Rebuild the 2.0L: This is a simpler and often more cost-effective option than a full engine swap. You could rebuild your existing engine with new components to increase power and reliability.
* Find a complete 850 with a 2.4L: If you want a 2.4L, you might be better off looking for a car that already has the engine you want. This will save you a lot of work and potential headaches.
If you're determined to do the swap:
* Do your research: Learn as much as you can about the specific engines and how they differ.
* Find a reputable mechanic: Get the help of a professional who has experience with these engines.
* Be prepared for challenges: Engine swaps are complex projects. Be prepared for setbacks and unexpected costs.
Overall, while it's possible to swap a 2.4L engine into an 850 2.0L, it's a project that's best left to experienced mechanics. If you're considering this, carefully weigh the costs, complexities, and potential risks.