Exhaust

Producing 235 to 325 horsepower and up to 610 pounds-feet of torque, the 24-valve 5.9-liter Cummins is considered to be one of the most reliable light-duty diesel engines produced. However, the engine is prone to exhaust issues.

With a long inline-six engine block, the 24V Cummins exhaust manifold is prone to cracking. As the cast-iron block routinely expands when heated and contracts during cooling, it puts strain on the cast-iron manifold. Once the manifold has cracked, exhaust pressure cannot build up, resulting in power loss, a poor idle, and misfires. Once this happens, the exhaust manifold needs to be replaced before there is further damage.

Shop for a new 5.9 Cummins exhaust manifold, stud kits, gaskets, and more at ProSource Diesel.