By Volgen Power Team | Last Updated: May 22, 2026 | Reading Time: 15 min Volgen Power has supplied Cummins 6CT cylinder heads and parts to fleet operators and diesel shops across North America since 2010. The information below reflects OEM specifications verified...
⚡ Quick Answer With over a decade of experience supplying Cummins replacement parts to fleet operators across 60+ countries, Volgen Power has seen every failure mode the Cummins 6BT 5.9L cylinder head can develop. The most common failures are injector sleeve...
A diesel engine cylinder head is the component that seals the top of each cylinder, houses the valvetrain, and forms one wall of the combustion chamber. When it cracks from thermal stress, warps from overheating, or fails due to head gasket blowthrough, the...
Quick Answer The Cummins NT855 and KTA19 cylinder heads most commonly fail from overheating (freeze cracking in cold climates, warpage in hot climates), head gasket blowthrough from improper installation, and valve seat wear after extended service. These are...
A diesel engine cylinder head is one of the most failure-prone components in heavy-duty engines. Unlike simpler parts, the cylinder head operates under extreme thermal stress, combustion pressure, and coolant system pressure simultaneously. When it fails, the entire...
Bottom line up front: A professionally executed cylinder head repair can restore 95–100% of OEM compression and sealing performance at a fraction of the cost of a new unit. However, not every damaged head is serviceable. As a certified heavy-duty diesel powertrain...
