The 153-cubic-inch 153 was a straight-4 engine which was designed for use in the entry-level Chevy II/Nova. Usage of the 153 lasted until 1970 when the inline six was made the base powerplant with the Chevy II/Nova. Currently, descendants of the 153 are used with industrial (forklifts or generators) or marine applications.
The 153 had a bore of 3.875 inches and a stroke of 3.25 inches. The firing order is 1-3-4-2. A later variant of the 153, the 181, used a larger 4 inch bore and a longer 3.6 inch stroke. The 181 (branded by GM as the Vortec 3000 for marine or industrial usage) was not installed in passenger cars. This engine is entirely different from the later Pontiac 151-cubic-inch (2.5 L) Iron Duke

GM Iron Duke engine

Iron Dukes were fitted with fuel injection in 1982. This version was christened the Tech IV, though Car and Driver later ridiculed it as the low-Tech IV. Power output remained at ....

, but the two are often confused today.

Applications:

• 1962–1969 Chevy II
• 1967–1971 Postal Jeep
• 1968–1973 Chevrolet Opala
  Chevrolet Opala
  The Chevrolet Opala was a mid-size car sold by General Motors do Brasil from 1969 to 1992. It was derived from the German Opel Rekord and Commodore, but used GM USA sourced engines, two four-cylinder engines: the Chevrolet 153 4-cylinder from Chevy II/Nova which later got a new crankshaft and...
  
   (Brazil)
• 1964 Chevrolet Van
  Chevrolet Van
  The Chevrolet and GMC G-Series vans were made by General Motors for North America. They are in the same vehicle class as the Ford Econoline van and the Dodge Ram Van.The term "Chevrolet van" also refers to the entire series of vans sold by Chevrolet...