Need Help With 02 Gt Engine Swap

Stop. You have made a mistake and you need to get the correct engine. Don't do something that will ultimately result in having to re-do the entire project.

Yes it will fit between the rails. And yes most everything will bolt up. And yes you will have some "additional" issues that everyone else won't have.

I'm fairly sure that if this swap is done, it will start but won't make good power. Why? Because the PCM has the timing/fuel curves for PI. For the Non-PI, the timing will not be optimal. Likely a custom tune will be needed. So expect the power loss to be even greater than the normal difference between a non-PI and PI motor.

The post does not state if you intend to use the transmission as well. Research VSS vs OSS sensor.

Just wondering how good of "deal" this really is. By time the cost of the custom tune is factored in, it seems like a Romeo out of a 2001+ Crown Vic/Grand Marquis/Town Car would be just about as cheap (without the loss of power and custom tune).

Ummmm...why not swap the heads and intake from the 02 engine? You didn't make a mistake. Just do the PI swap on the 97 and get a tune!

Do you mind sharing just how good the "deal" was on the 97?

The 97 PCM will NOT swap into a 99+. Why? Think about the differences! For example coil pack vs coil on plug. Huge difference in the electrical between 96-98 and 99+

It seems to me that if this is all about having a daily driver that "works" for the least amount of $$, then worrying about a loss of horse power is....Well...Silly. The focus should be on things like, "will it get me from point A to B".

Keep the transmission that you have. It will bolt right up the NPI 4.6. This avoids wiring harness and speed sensor issues.

Transfer the motor wiring harness, ignition, induction, front acc, fuel rails from the old motor to the NPI.

You may find it easier to swap valve covers and PCV system from the 02 as well.

You will have an issue with the heater return as the nipple is different. Either get an O-ring style block nipple or a heater return from a 97. Which in your case shouldn't be hard as you have the whole 97 parts car.

Get NEW motor mounts!

Drive it. Think of the $$ saved. See how it drives and see if a custom tune is even needed.

But........ Think about doing your home work next time before buying.

You'll definitely have the slowest PI New Edge GT in town with this swap. Sell it, and invest in the correct PI motor for the car and save yourself the trouble. Just my 2 bits.

Maybe you can make a little profit selling the parts car and have all the money you need to get a good PI motor. Wheel and deal that stuff.

Have you every done any major motor work before?

Have you considered that when it comes to motor failure, rarely does just one part fail. Ask yourself, HOW did the valve get bent? PTV contact perhaps? Will what else happened after?

Often when a part fails it will spread the debris throughout the motor. So unless you are prepared to disassemble, clean, and re-assemble how can you "KNOW" there isn't any debris inside the motor?

Bottom line, only after the motor is on the engine stand and partially disassembled will you be able to tell if the motor you have can be rebuilt. Then compare the cost of rebuilding to a whole new salvage motor.

Suggestion. Go to car-part.com and look for a 2001+ salvage 4.6 out Crown Vic/Grand Marquis, or Town Car. How much for a unit from your area?

Just as a point of reference, when I did my swap, I paid $800 for a 2003 motor from a Grand Marquis with 30k miles. I paid extra for a verifiable low mileage unit.

Hint on how to verify if the salvage yard is being "up front" with you. All salvage yards are required to keep records which VIN the part comes from. Run a CarFax report on the VIN. The CarFax report will have the mileage when the VIN was totaled.

Why such a negative tone on this thread? I like Mattstang04's suggestion. Part out the 97 to make a little more cash, then either take your 02 heads to the machine shop, source a set of heads off another salvage unit or if you make enough cash, get a set of ported PI heads! You can scrap the 97's body and make several hundred for just the metal! I dropped off 160lbs of scrap this last weekend and make 15 bucks! Roughly 9.5 cents a lb! 9.5 cents times 3000lbs is $285 bucks! My local salvage yard charges $70 for a SOHC head and $80 for a DOHC head. Don't get discouraged and stay the course!

Why take a perfectly good non-PI motor and send it back to the graveyard? You have all the parts you need for the PI swap from the 02! Why would you get another PI motor when you already have everything you need? Convenience? It is true that something other than just the valve might be damaged, but all you need is the heads. IMO you should at least take the heads off of the 02, inspect them for further damage, if there is none, then throw another valve in it! Seat it with some valve grinding compound and call it a day! Then save up if you feel like the car isn't making the power you want and get a good set of ported heads!

Many times people lose sight of the big picture. If you are wanting to go to the dyno and put down some big numbers then you might want to consider another option. If you just want to get the car going again, dive into it! What have you got to lose? You can always return to this thread to listen to people tell you that you screwed up!