Spark plug gap for a 98 Chevy 5.7 liter?
The recommended spark plug gap for a 1998 Chevy 5.7L (most likely a Vortec 350) is 0.040 inches (1.0 mm). However, always double-check your owner's manual or a reputable repair manual specific to your vehicle's year and engine code for the most accurate information. Slight variations can exist depending on the specific spark plug used.