Is it possible to swap a 3.7 for a magnum 5.2(318), or even better 6.1 hemi. Aside from trans & wiring harness what else would I need to perform either swap? My Commander is a 2010 the heads warped & my extended warranty screwed me. So Im paying for this myself.
Will you be doing the work yourself? Or will you be getting screwed by a shop, in addition to getting screwed by the extended warranty?
Anything is possible with enough time, money and skill.
However, swapping a V8 into a Commander that left the factory under V6 power is probably one of the more difficult, time consuming and expensive swaps you can do. As a DIY project, a first timer would basically need a donor V8 commander as the most economical way to get all the parts you need. Since you need the entire driveline (everything is different between the two, engine, transmission, transfer case [if 4wd], final drive[s]), you pretty much need a donor that runs. At that point, the question is why not just drive the V8 one? It's probably cheaper to fix anything wrong with the V8 commander than it is to take everything over to the original V6 commander.
To swap a V8 that didn't come in (many) commanders, you'd really need to start with a V8 commander, too. Putting a 6.1L hemi where the 4.7L V8 used to be is work, but it's feasible. I'm not sure why you'd want to put a Magnum 5.2L in there, but again, swapping that into a V8 commander would also be feasible. I wouldn't do it, even if I had a brand new 5.2L still in the crate, but it's your call. The tough part of that swap would be the electronics and wiring. Commanders never came with 5.2L Magnum engines, and I don't think the Commander ECU would understand a single ignition coil and dizzy. I don't remember the 5.2L or 5.9L Magnum engines ever having coil-over-plug ignition.
If this is a DIY project, or the educational value, consider this plan:
- Fix the 3.7L engine (optional)
- Sell the V6 commander
- Buy a V8 commander. If you want power, get a 5.7L Hemi or if you want a 6.1L Hemi, find a 2006 Commander (SRT?) with the 6.1L or Grand Cherokee SRT
If You really want a DIY engine swap, follow the above, but swap your 6.1L into a V8 (probably 5.7L is best, though 4.7L is possible) Commander.
If you're paying a shop, sell the V6 "as is" and buy a V8 Commander with the engine you want. You wont recoup the shop repair bill when you sell the V6, so don't even try.