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The Quad 4 is the first domestic regular production DOHC four-cylinder engine wholly designed and built by GM, the only similar prior example being the Chevrolet Cosworth Vega, whose DOHC head was designed by Cosworth in England. In addition to the 2.3-liter DOHC Quad 4s, there was also a short-lived 2.3-liter SOHC variant called the "Quad OHC ...
Removed text: Many Quad 4 engines did not see over 120,000 miles (190,000 km) due to connecting rod issues [citation needed].The Quad 4 was plagued with blown headgasket issues almost from the introduction of the engine. The problems primarily arose from the fact that the cylinder head was built from aluminum and the block from cast iron, which ...
The engines were also sold for marine and stationary applications. In a 1938 reorganization, Winton Engine Corporation became the GM Cleveland Diesel Engine Division, and GM's Detroit Diesel Engine Division began production of smaller (50–149 cu in (0.8–2.4 L) per cylinder) diesel engines. Locomotive engines were moved under the GM Electro ...
Jeep with GM Iron Duke inline 4 2.5L/151 in 3 (1980-1983). These use a Chrysler custom Torqueflite 904 automatic transmission with an integral Chevrolet bellhousing. Do not confuse with later AMC 2.5 L engine that uses GM small corporate pattern . Chevrolet Turbo-Thrift engine (post-1962)
The GM Quad 4 multi-valve engine family debuted early 1987. The Quad 4 was the first mainstream multi-valve engine to be produced by GM after the Chevrolet Cosworth Vega. The NA Quad 4 achieved 1.08 bhp (1 kW; 1 PS) per cubic inch (49.1 kW/liter). [2] [20] Such engines soon became common as Japanese manufacturers adopted the multi-valve concept.
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It was offered in four different trim levels during its production run: S, SC, SL, and SCX. Available engines included different versions of the Oldsmobile-developed 2.3 L Quad 4 engine: the base single-cam L40 "Quad OHC", the DOHC LD2, the high-output LG0, and the special "W41" variant of the LG0 Quad 4 used in the SCX model. All were replaced ...
The Oldsmobile Quad 4 is a straight-four engine with four valves per cylinder and dual overhead camshafts — the first volume production engine designed entirely in the US to have these features. The factory Quad 4 produced 150 hp (112 kW) and 160 lb⋅ft (217 N⋅m) of torque in its initial configuration.