Q: i cannot find a used engine for my truck,will a engine from a grand marquis fit in the truck?

asked by on

as i cannot find a low mileage truck engine i was wondering if the car engine would swap into place without to much modification. the car engine is from a 98 grand marquis and looks somewhat similar
both engines are 4.6 My car has 260000 miles.
My car has an automatic transmission.

I looked up the two applications. Those two engines use completely different castings for both the heads and the block and the flywheel (flex plate) is different as well which will make it incompatible with your transmission. If you search at Car-Part.com you will find an exact match for your truck. Engine swaps on modern computer controlled vehicles must be exact matches because if you attempt to use an engine that is not cataloged as a direct cross reference for your car or truck, you will find that the engine computers are not interchangeable. Consequently, even if you can get a "different" engine to physically fit, it won’t start and run. And, you cannot flash re-program your existing computer to work with a new engine because all of these engines use different computer hardware, that is physically different PCM’s. In addition, the engine wiring harnesses are completely different, and the TCM (transmission control module) will have to be completely changed as well. As if that isn’t enough, if and once you substitute a new PCM and TCM they won’t work seamlesly, if at all, with the other computers on the vehicle such as the body control module but there are many other microprocessors involved as well. In the modern era, really the only way engine swaps using non cataloged, non interchangeable engines can work is if you literally carry over all electronic controls and wiring that are associated with the engine and the vehicle to your vehicle. Obviously, that makes it very impractical and so few people do it. If you have further questions or concerns, do not hesitate to re-contact YourMechanic.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. i cannot find a used engine for my truck,will a engine from a grand marquis fit in the truck?

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Car won't start or stay in park.

Hi there. The issue could be the shifter cable not adjusted properly or the transmission position sensor could have failed. If the transmission is not shifting into park, then check the shifter cable to see if its loose on the...

Q: Heater only works on high

It sounds like you may have a faulty blower motor potentially drawing too much power from the resistor causing it to burn itself up. As you know, the individual blower motor resistor inside the pack are usually wire wound and...

Q: Engine control modules replaced on a newer car

Hi there. These modules are common failures on the Jaguar XF. I am sure that this does not make you feel any better about it, but from my experience, once the modules are replaced you usually do not have any...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...