The Magnum version featured a variable intake system to create a "supercharging" effect at different engine speeds.

Higher than average operating temperature, an insufficient oil capacity and the timing chain driven water pump leaking into the crankcase are all factors in why this occurs .

[4][5][6] In February 2009, five separate class action lawsuits related to the alleged oil sludge defect were consolidated to the District of New Jersey.

[8] The engine was affected by an oil sludge problem and premature timing chain tensioner failure.

Also this engine was plagued with issues regarding the water pump gasket leaking coolant internally and diluting the oil.