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With 235-325 horsepower and 460-610 pounds-feet of torque, the Cummins 24 valve diesel engine is fairly reliable overall. Its internal components — such as the pistons, solid lifter crankshaft, and rods — should last a long time. However, it is common for the 5.9-liter ISB engine to get cracked exhaust manifolds. +Read more
The 5.9’s inline-six design features a long cast-iron exhaust manifold. During operation, the rigid cast iron will expand and then contract as it cools after the engine has been shut off. Because of its lack of flexibility, the 5.9 Cummins’s exhaust manifold can crack, resulting in poor performance and boost and misfires.
Keep your truck running its best with ProSource Diesel’s wide selection of 5.9 Cummins 24 valve parts.
