![]() ![]() The intake manifold, also known as a intake plenum, is made of two separate pieces on the 5.9 Magnum. However, the people who have no issues at all seem to outweigh the people with a lot of issues. It seems like people either have no issues at all with their 5.9 or they have a ton of issues with it. Outside of these two issues the 5.9 is generally a stout and reliable engine. The two biggest issues with the 5.9 Magnum are plenum gasket leaks and the weak cylinder heads. While the 5.3 Vortec was known for its reliability, Ford’s Triton engines were known for being more problematic. Its reputation as a gas guzzler has led to further criticism of the engine.ĭespite receiving a poor rap against the Ford and Chevy engines of its time, the 5.9 Magnum at least holds it weight with respect to reliability. A downside of the large engine size is gas mileage. ![]() of torque, the 5.9 Magnum has generally been criticized for its lack of power compared to its Ford 5.4 Triton and Chevy 5.3 Vortec competitors, despite its materially larger engine size. While the Magnum is an upgraded LA-series engine, the term “ Magnum” was purely a marketing word assigned to the engines.Īt 5.9L, producing 245-250hp and 335-350lb-ft. Its predecessor, the LA 360 V8 was produced from 1971 until 1993 when it was fully replaced for the 5.9 Magnum. The Magnum is built off of the Chrysler LA engine family, a group of pushrod overhead valve, 90 degree small block gasoline engines. The 5.9 has a little brother, the 5.2 Magnum which is also a naturally-aspirated V8 and was used as the base engine option for Dodge’s and Jeep Grand Cherokees during the same time frame. ![]() In 2003 the 5.9 Magnum was replaced with the 5.7L Hemi V8. With 360 cubic inches of displacement, the engine is also commonly referred to as the 360 Magnum. The 5.9 Magnum is a naturally aspirated 5.9L V8 engine that was produced by Chrysler from 1992 up until 2003. ![]()
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