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If i have a 2002 dodge ram 1500 with 4.7 motor can replace the 2003 5.7 motor?

No, you cannot directly replace a 2002 Dodge Ram 1500's 4.7L engine with a 2003 5.7L engine without significant modifications. While both are V8s, they have different dimensions, mounting points, and wiring harnesses. The 5.7L is significantly larger and heavier. You'd need to address:

* Engine Mounts: The engine mounts are different and won't align. New mounts would need to be fabricated or sourced, which is a complex task.

* Wiring Harness: The wiring harness for the 5.7L is different and incompatible with the 4.7L's system. You'd likely need a complete 5.7L harness or extensive rewiring.

* Exhaust System: The exhaust system is different and won't fit. A new exhaust system would be needed.

* Transmission: While the transmission *might* be compatible (depending on the specific transmissions in both vehicles), it's not guaranteed and may require adjustments or modifications.

* Computer/ECU: The engine control unit (ECU) is entirely different and incompatible. You would need the ECU from a 5.7L-equipped vehicle, and it might still require programming to work correctly.

* Cooling System: The cooling system might need modifications to accommodate the larger engine.

In short, the project would be extremely complex, expensive, and likely impractical for a typical automotive mechanic. It's far more cost-effective and easier to rebuild or replace the existing 4.7L engine.

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