The specified spark plug gap for a 1986 Chevrolet Caprice depends on the engine. There were several engine options available that year. You
must consult your owner's manual or a reliable repair manual specific to your Caprice's engine (e.g., a small-block V8, a large-block V8).
Without knowing the specific engine, I cannot provide the correct gap setting. The gap is typically between 0.035" and 0.060", but this is a broad range. The correct value is crucial for optimal engine performance and is engine-specific.
