of oil sludge is a common issue that plagues this engine. 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 . The 2.7 L V6 engines have suffered from oil sludge contamination. In February 2009, five separate class action lawsuits related to the alleged oil sludge defect were consolidated to the District of New Jersey. During the Chrysler bankruptcy proceedings, there was concern among consumer advocate groups that Chrysler's proposed "free and clear" sale of assets to "New Chrysler" would allow the automaker to avoid liability for the oil sludge defect. The engine was affected by an oil sludge problem and premature timing chain tensioner failure. The oil sludge issue appears to have been caused by issues with the crankcase ventilation system, and while it affected a minority of engines, it could cause complete failure In some cases, neglected maintenance aided in premature failure (missed oil changes or increased intervals between oil changes). Also this engine was plagued with issues regarding the water pump gasket leaking coolant internally and diluting the oil. Such coolant leaks must be addressed instantly or engine failure is imminent. See also List of Chrysler engines Chrysler LH platform References External links Allpar's page on the 2.7 L V6 LH V6 engines Gasoline engines by model