There's no single answer to how much a 1987 El Camino engine weighs. The weight depends entirely on *which engine* was installed. A small, fuel-efficient four-cylinder will weigh significantly less than a large, powerful V8. Chevrolet offered several engine options for the '87 El Camino.
To find the weight, you'd need to know the specific engine code (found on a sticker or stamped on the engine itself) and then consult a service manual or a reliable online resource for that specific engine's weight.
