New Engine?

The vehicle has a VIN, or Vehicle Identification Number. That number is referenced to the chassis. The odometer indicates how many miles that chassis has traveled. You wouldn't change the odometer every time you replaced the tires or the fenders or the transmission or the axels or seats or radio - or the engine. Those are parts that make up that vehicle. Tampering with the odometer is against the law. Now, if you must change the odometer because of a failure - that is legal. However, you're supposed to have the new speedometer flashed with the memory of the old speedometer to reflect the correct mileage.

There IS a way to change the mileage in the memory but it involves knowledge of computers on a component level and knowing what codes to look for and change. There ARE places that know how to do that. And if you're tech savvy then yes, you can do it with the equipment you likely have in your home. But it's against the law for the simple reason that representing a vehicle with fewer miles on it than is actual - is FRAUD.

No. You don't change or reset the odometer when you swap engines; new or used. The engine makes the car go. It doesn't make the car.

Only if you keep a record of the mileage when you changed it, and when the car is sold you enter the actual mileage since new on the title. Its much easier to do the other way around because you don't have to do anything but write down the mileage at engine change. It's illegal to do it and claim that those are the actual miles on the vehicle. I suggest adding an hour-meter as well, since that is a more accurate measure of total engine use. https://www.amazon.com/Automotive-Replacement-Hour...

No. Installing a new engine DOES NOT make it a whole new car. The miles shown on the odometer are for the entire vehicle, NOT just the engine.

No. Federal law requires the actual mileage on the vehicle, not just the motor, to be displayed. In the event the odometer needs to be replaced it has to be set to the actual mileage by a shop that does speedo repair. Years ago with mechanical speedometers a tag had to be riveted to the inside of the drivers door below the door latch with the mileage listed at the time the new zero reading odometer was installed.

No' it's not okay. Even if the engine is a brand new engine ( not a rebuilt ), the rest of the vehicle, including the rest of the powertrain components, is still older and has the accumulated mileage on it.

You could but that would likely be cheating as the rest of the car has suffered wear and tear not just the engine

simply put, no...........................

not worth the expense by law u must give correct miles when selling it

The undercarriage chassis other stuff like heater ac seats and other stuff are new are they? just leave the mileage and tell everyone the engine is new

If you replace the speedometer, you must fill out a form that tells the original mileage from the old speedometer, and this information will be shown on the title.