Engine Components for 2004.5-2005 6.6L LLY Duramax

Producing 310 horsepower and 520 pounds-feet of torque, GM’s 6.6-liter Duramax LLY engine isn’t immune to engine woes, especially overheating.

The LLY Duramax is prone to head gasket failure due to an insufficient cooling system and large Garrett VVT turbocharger. Symptoms of a bad head gasket include white smoke, overheating, and a loss of coolant. +Read more

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