* Engine Size and Configuration: The 1987 Z24 Cavalier likely had a 2.0L or 2.5L 4-cylinder engine. The 1989 V6 Cavalier has a different, larger, V6 engine.
* Transmission Compatibility: The engine's transmission (automatic vs. manual) is a major factor. The engine from the automatic car is designed to mate with an automatic transmission and won't directly fit the manual transmission in the 1989 car.
* Computer and Wiring: These engines likely have different computer systems and wiring harnesses.
What to Do:
1. Double-Check Engine Codes: Look up the exact engine codes for both cars to confirm the engines are not compatible.
2. Consult a Mechanic: A qualified mechanic can assess the compatibility and advise you on any modifications needed.
Alternatives:
* Find a V6 Engine: You'll have the best chance of success by finding a compatible V6 engine from another 1989 or similar year Cavalier with a manual transmission.
* Swap the Transmission: It's possible, but more complex, to swap the entire transmission system from the 1989 manual Cavalier into the 1987 car, but it involves significant work and potentially additional parts.
Remember: Engine swaps are major projects that require expertise and proper parts. It's always best to consult a professional mechanic before proceeding.
