Nissan pickups were among the original compact trucks in America, as the automaker released its first small pickup in the U.S. way back in 1959. Known as the Datsun 1000, this pickup had just 37 horsepower coming from its 1,000 cc engine. In 1987, Nissan released the D21 Hardbody pickup, which ended up being one of the automaker’s most popular models. The 1992 D21 Hardbody had a pair of engines — one four-cylinder and one V-6 — and each had its own required spark plug gap.
Spark Plug Gap
The 2.4-liter, four-cylinder engine in the 1992 D21 pickup requires a spark plug gap of 0.044 inch. The D21’s optional, 3.0-liter V-6 requires a plug gap of 0.032 inch.