The Cummins X15 single cam engine introduced a simplified valvetrain design.
But with that design came a very specific failure pattern:
Valve recession and valve seat wear inside the cylinder head.
This issue does not always show up immediately – but when it does, it leads to:
- Loss Of Compression
- Misfires Under Load
- Increased Exhaust Temperatures
- Premature Cylinder Head Failure
Understanding why this happens is critical to preventing repeat repairs.
Continue reading Cummins X15 Single Cam Cylinder Head Problems: Valve Recession and Seat Failure Explained










