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Q: about the engine on 1995 Chevrolet Lumina APV

what can be done if the motor is locked up
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Rebuild it - costly but more reliable.
Replace it with a used one - less costly and less reliable since no maintenance and driving history is available.

Mine the cam had a piece flake off 3.8 L. Got caught in oil pump behind harmonic balancer behind cover. Cheap way other than overhaul is to put a big wrench on harmonic balancer and give a big pull. Or take off harmonic balancer and water pump and cover. Remove oil pump around crank. Probably will need new cover
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