Reference Details
- Common issue
- A correct-looking engine code or displacement can still belong to another car if the serial-number/VIN relationship and paperwork do not agree.
- Confidence
- documented
- Correct value
- Team Buick's Buick engine-identification page states that, for 1968-1972 400/430/455 engines, the engine serial number is just below the deck on the left driver's side and should match the VIN plate.
- Where to check
- Inspect the engine serial-number stamping below the deck on the left driver's side and compare it with the vehicle VIN plate and supporting paperwork.