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Production on the 3.3 was stopped in 2010 after a run of 5,076,603 [2] engines, while the 3.8 remained in production until May 2011 in Trenton, Michigan for the Jeep Wrangler. Both use a cast iron block and aluminum heads .
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 engine features a cast iron block, and pistons with shallow crowns to save weight. The block uses a bedplate featuring a perimeter wall with transverse webbings for durability and quiet operation at high engine speeds. The pistons are attached to fracture-split forged, powdered metal connecting rods using semi-floating press-fit pins.
In engine blocks made of gray cast iron, weight can be reduced by optimizing the structure and thin-wall casting. With this casting technique, a wall thickness of as little as about 3 mm is generally possible. In comparison, the walls of cast iron engine blocks are usually from 4.0 to 5.5 mm thick. Using vermicular graphite cast iron (GGV), a ...
The engine had a remarkably low idle speed of 450 rpm with standard transmission and 375 rpm (while in drive) for the automatic; [5] a modern engine is usually tuned to a minimum 600-700 rpm. The electrical system was a 6-volt primary with a negative ground, and a conventional mechanical ignition , with the firing order 1-6-2-5-8-3-7-4.
This was so named because it began with Chevrolet's V8 engines. Chevrolet big-block V8s; Chevrolet small-block V8s; GM Vortec 4300 90° V6; GM Iron Duke RWD inline 4 (early RWD Variants, later versions may use a FWD pattern, and have two possible starter locations) Jeep with GM Iron Duke inline 4 2.5L/151 in³ (1980-1983).
1,423 cc inline-four, bore 76.5 mm (3.0 in) × stroke 77.4 mm (3.0 in) head SOHC 2-valve per cylinder, 10:1 compression block cast iron, five bearings output 62 kW (84 PS; 83 hp) at 5,500 rpm, 118 N⋅m (87 lb⋅ft) at 4,200 rpm fuel electronic injection [SPI] or carburettor aspiration cast aluminum intake manifold, cast iron exhaust manifold
The "GEN-3" engines were available in Jeep utility vehicles starting in 1971. [3] It is not the same as Chrysler's 360 V8. [ 4 ] Chrysler continued production of the AMC 360 engine after the 1987 buyout of AMC to power the full-size Jeep Wagoneer (SJ) SUV that was produced until 1991. [ 5 ]
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