2007 saturn aura belt diagram12/2/2023 ![]() ![]() Its bore and stroke dimensions are larger. The 2.4 LE5 engine is a larger 2.4L version of the Ecotec family. Valvetrain: DOHC four valves per cylinder.In addition to that, GM 2.4 Ecotec engine features variable valve timing extended spark plugs life, extended coolant life, and electronic throttle control. The engine has remained in the industry for 13 years and has further updates marked with unique LE9, LE5, LAF, LAT, and LUK. General Motors produced this engine to power various compact and midsize vehicles such as Equinox, Saturn Ion, Aura, Vue, Chevrolet Malibu, Pontiac G5, and Buick Regal to name a few. The GM 2.4 Ecotec engine is a four-cylinder, 2.4-liter gasoline engine. It is also efficient and economical, offering good fuel consumption averages. The engine has a power rating of 182 HP at a maximum which is pretty decent for a small N/A design. However, throughout its tenure, the engine served many vehicles, including Buick, Chevy, Saturn, Pontiac, and GM models. Honda makes good engines, we own a âKâ 4 cyl in a CRV, but they seem to have convinced the public that belt changes and valve adjustments are normal service expenses that everyone has, when they are not.The great GM 2.4 L Ecotec engine made its way to the automotive industry in 2006 and remained in the field for several years until its graceful exit in 2019 in the form of Polaris Slingshot. My â97 Saturn SW2, with a chain, has over 160K miles, a friends Honda with a belt just cost him several hundred to have the belt changed at the 100K-mile service. The only timing chain issue I have ever heard about was some first year Ecotech engines, inadequate oiling, resolved quickly. The Honda still requires that the valves be adjusted, not cheep, and if not done or done incorrectly, very expensive! The Ecotech has automatic valve lash adjusters, as does every other GM engine produced in the last four decades. Another related issue is valve adjustment. I second the opinion that all engines should use a chain, even Honda has woken up to this and the K series four cyl engines now use a chain. I can confirm that the Ecotech uses a chain in all but the smallest of displacement, the 1.8L. It would suck if that exhaust valve clashed with the piston because the VTEC system kept it open a little to long. I can see the logic of why VTEC engines would be non-interference because of the difference in valve actuation. It also uses a timing belt versus a chain. A domestic engine that comes to mind is the 3.5L Chrysler developed while they were still Chrysler Corp. Honda is not exclusive in this type of engine design, as many other auto manufactors have non-interference engines. The engine will indeed simply stop operating as the Honda salesmen stated. ![]() ![]() Meaning, if the timing is lost within the engine (timing belt breaks) none of the internal parts, mainly the valves and pistons, will come into contact with each other. VTEC Engines are non-interference engines. Some owners of cars with timing belts are not so fortunate. FWIW, a few years ago, a Honda salesman told me that VTEC engines were designed so that if the belt broke, it would not affect any other moving parts in the engine: the engine would simply stop. ![]()
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