The Iron Duke was a 151 cubic inch, 2.5 litre inline four that the Pontiac Motor Division of General Motors built from 1977 to 1993. Pontiac developed it after the 1973 oil crisis as an economy engine, choosing an all new four over smaller versions of its V8, and aimed at smooth running, long life and torque at low speed rather than performance. It had a cast iron block with five main bearings and overhead valves, and it borrowed some outside parts from the earlier Chevrolet four. It first appeared in the 1977 Astre and Sunbird and in the Phoenix, was redesigned in 1979 with a crossflow head, gained throttle body fuel injection as the Tech IV in 1982, and received a balance shaft in 1988. GM also sold it to American Motors from 1980. Production is estimated at between 3.8 and 4.2 million engines.
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Fuel or Cycle Configuration Cylinder Count Connections
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Source Iron Duke engine (Wikipedia)
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Source Iron Duke engine (Wikipedia)
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Source Iron Duke engine (Wikipedia)Lead, Pontiac Motor DivisionQuote, Lead, Pontiac Motor Division
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.
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1. Iron Duke engine (Wikipedia)
Lead, straight-4
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.
Development, carburetor
limit heat soaking of the gasoline in the carburetor
Lead, Pontiac Motor Division
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.
Of Make: Pontiac, Lead, division
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.
Part Of: Pontiac Astre, Early applications
The Iron Duke's first applications were in the 1977 Astre and Sunbird subcompact cars, replacing the 2.3 L Vega engine, and in the compact Phoenix.
Part Of: Pontiac Sunbird, Early applications
The Iron Duke's first applications were in the 1977 Astre and Sunbird subcompact cars, replacing the 2.3 L Vega engine, and in the compact Phoenix.
Part Of: Pontiac Phoenix, Early applications
The Iron Duke's first applications were in the 1977 Astre and Sunbird subcompact cars, replacing the 2.3 L Vega engine, and in the compact Phoenix.
Part Of: Chevrolet Monza, Early applications
the engine's use expanded to the Sunbird's Chevrolet and Oldsmobile twins, the Monza and Starfire
Part Of: Oldsmobile Starfire, Early applications
the engine's use expanded to the Sunbird's Chevrolet and Oldsmobile twins, the Monza and Starfire
Exemplifies: Road Transport, Lead, automobile engine
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.
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