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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 ...
Starting around 1925 engine blocks and cylinder heads were now developed at each brand but were cast at Saginaw Metal Casting Operations. [3] In the mid-1960s, there were 8 separate families of GM V8 engines on sale in the USA. [4] [1] By the 1970s, GM began to see problems with their approach.
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.
The GM Ecotec engine, also known by its codename L850, is a family of all-aluminium inline-four engines, displacing between 1.2 and 2.5 litres.Confusingly, the Ecotec name was also applied to both the Buick V6 Engine when used in Holden Vehicles, as well as the final DOHC derivatives of the previous GM Family II engine; the architecture was substantially re-engineered for this new Ecotec ...
Quad 4 engine; S. Oldsmobile straight-6 engine; Oldsmobile straight-8 engine; V. Oldsmobile V8 engine This page was last edited on 20 June 2024, at 09:01 (UTC) ...
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 for 1996 by a revised 2.4 L version.
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