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The Iron Duke engine (also called 151, 2500, Pontiac 2.5, and Tech IV) is a 151 cu in (2.5 L) straight-4 piston engine built by the Pontiac Motor Division of General Motors from 1977 until 1993. Originally developed as Pontiac's new economy car engine, it was used in a wide variety of vehicles across GM's lineup in the 1980s as well as supplied ...
The GM Iron Duke was a predecessor I4 engine in some AMC vehicles, but it shares nothing in common with the AMC 2.5 L. The Chrysler 2.5 L I4 shares nothing, and this successor engine family was designed to improve emissions and fuel economy.
Chevrolet 153 Inline 4 (Chevy II, pre-Iron-Duke - includes the Vortec 3000/181 industrial/marine crate motor) Detroit Diesel V8 6.2L and 6.5L; Duramax V8; Generation III V8s with modifications. These modifications include an additional bolt hole at the top of the pattern, and attachment points for cast oil pans to lower bellhousing extensions ...
A magazine advertisement for the 1983 Chevrolet Celebrity with standard 2.5-liter Iron Duke engine. Skip to main content. 24/7 Help. For premium support please call: 800-290-4726 more ways to ...
This 2,471 cc variant of the engine was in production in the Opala until 1992. Coincidentally, the bore and stroke are the exact same as the Pontiac Iron Duke engine introduced in North America in 1977, but the two engines are otherwise unrelated and do not share parts. [4] As is customary in Brazil, the engine was refit to accept ethanol fuel.
The 5.0 liter (305 CID) engine was the only V8 option for the 1977 model year. The standard Vega 2.3 aluminum-block engine was discontinued at the end of the model year, replaced with the Pontiac 2.5 "Iron Duke". The 1978 Monza line expanded to include rebadged holdovers from the Vega line, which ended production after the 1977 model year ...