The Nissan Z engine is a series of automobile and light truck four-cylinder engines that was engineered by Nissan Machinery, manufactured by the Nissan Motor Company from 1979 through August 1989. All Z engines had 4 cylinders, a total of 8 valves and a single overhead camshaft (SOHC). Displacements ranged from 1.6 L to 2.4 L.The Z series' engine blocks were nearly identical to those of the earlier L Series with the exception of the Z24. While the Z16 and Z18 engines had a deck height similar to the earlier L13/L14/L16/L18 variants, the Z24 had a taller deck height to accommodate a longer stroke. The most notable difference between the Z-series engine and its predecessor was the introduction of a new crossflow cylinder head which reduced emissions by moving the intake ports to the right side of the engine opposite the exhaust ports. This change allows the exhaust port velocity to more effectively scavenge the cylinder and reduce reversion pulses to enhance induction. This change also limits maximum valve lift/lobe lift profiles rendering the cylinder head and valve train configuration undesirable for high-performance uses. The Z series evolved into the NA and KA engines which, along with the smaller CA series, replaced the Z series . Z16 The Z16 made its first appearance in 1978 in the Nissan Violet A11. Offered only in selected overseas markets, this version of the engine came with a single downdraft carburetor. Later it was also available on low-end model Datsun Bluebird 910s for the Japanese domestic market and some Nissan commercial vehicles in a single-plug configuration. Reference specifications (twin plug): Displacement : Bore × stroke : Compression ratio : 8.8:1 Maximum output (JIS gross) : at 6,000 rpm Maximum torque (gross) : at 3,600 rpm Car models: 1982-1986 Datsun 720 (single plug specification) Nissan Navara (D21) (Japan name: Datsun truck / single plug specification) 1979 Nissan Bluebird 810 Nissan Bluebird 910 Nissan Atlas (F22) (single plug specification) Nissan Skyline (C210) Nissan Violet (A10) The Z16E is an EFI version of the Z16S, fitted with Nissan's EGI system. Released at the same time as the Z16S, it was used on the Nissan Violet. It has almost the same internal structure as the less powerful Z16S. Reference specifications: Maximum output (JIS gross): at 6,000 rpm Maximum torque (JIS gross): at 4,000 rpm Other numbers are equivalent to Z16S. Car models: Nissan Violet (A11) Z18 The Z18