2022 Ram 5500 6.7L Cummins | Hydraulic Lifter Failure & Hamilton Flat Tappet Conversion

Our technician began by examining the pistons and cylinder walls for evidence of physical damage. This inspection helps determine whether the valvetrain failure may have affected other internal engine components.

The technician examined the tops of the lifters for physical damage. Since the hydraulic lifters were identified as the source of the excessive valve lash, inspecting their condition was an important part of documenting the failure.

When the hydraulic lifters fail to maintain the correct clearance, the resulting abnormal movement can place additional stress on the pushrods and other valvetrain components.

Removing the cab allows technicians to reach areas of the engine that would otherwise be difficult to access during major disassembly and component replacement.

Fuel contamination can dilute engine oil and reduce its ability to lubricate and protect internal components. This finding was documented during the repair process; the photograph alone does not establish the source of the fuel contamination.

This step was necessary to prepare for removal of the original camshaft and installation of the replacement components.

Removing the failed hydraulic lifters allowed the technician to proceed with the replacement valvetrain configuration.

The presence of damaged components and debris highlights the extent of the valvetrain failure and the importance of carefully inspecting the affected areas.

The camshaft controls valve timing through the engine's valvetrain and must be correctly installed and timed for proper engine operation.

These sealing components help prevent engine oil from escaping at the rear of the engine.

Replacing accessible sealing components during major engine disassembly helps reduce the likelihood of having to repeat extensive labor to address future leaks.

This was part of the preparation for installing the new camshaft and completing the conversion.

This conversion addresses the failed hydraulic lifter setup by using a different valvetrain design. Proper component compatibility, installation, lubrication, and valve lash adjustment are essential for this type of conversion.

This is a precision operation involving a critical component of the engine's timing system.

This comparison documents the transition from the factory configuration to the components being installed as part of the Hamilton conversion.

The retainer helps maintain the camshaft's correct axial position within the engine.

Correct timing alignment is critical because the crankshaft and camshaft must remain synchronized for the engine's valves to operate at the appropriate points in the combustion cycle.

Proper sealing is essential for maintaining engine oil containment during operation.

These components seal the front of the engine and help prevent oil leakage around the crankshaft.

These components seal the front of the engine and help prevent oil leakage around the crankshaft.

This completed an important stage of engine reassembly before the remaining components were installed.

Banks Grid Heater Upgrade

This modification changes the original intake heating configuration. Compatibility, cold-start operation, and emissions compliance must be considered when installing aftermarket intake components.

Valve bridges help transfer rocker arm movement to the appropriate valves in the cylinder head.

Pushrods transfer motion through the valvetrain, making their condition and correct installation important for proper valve operation.

Rocker arms transfer motion from the pushrods to the valve bridges, allowing the valves to open according to the camshaft's timing.

With the Hamilton flat tappet conversion, the valvetrain now uses a different lifter arrangement from the original hydraulic system. Correct mechanical valve lash adjustment is required for the converted setup.

This filter is part of the engine's crankcase ventilation system, which manages crankcase vapors during operation.

The heater hose carries coolant through the vehicle's heating circuit.

This process removes air and moisture from the serviced refrigerant circuit and allows technicians to check whether the system maintains vacuum before charging.

The air filter helps prevent airborne contaminants from entering the engine's intake system.

Why This Repair Matters

Hydraulic lifter failure can create problems throughout the valvetrain when excessive valve lash develops.

In this case, the repair required more than replacing a single failed component. Our technicians worked through inspection, disassembly, camshaft replacement, valvetrain component replacement, engine resealing, and final reassembly.

The Hamilton flat tappet conversion was a central part of addressing the failed factory hydraulic lifter arrangement.

This project demonstrates the level of detailed mechanical work involved in repairing a major diesel engine failure.

Need Diesel Engine Repair in Northeast Georgia?

At 441 Diesel, we work on diesel trucks ranging from pickups to larger commercial vehicles.

Whether you're dealing with engine performance issues, valvetrain problems, oil leaks, or a major mechanical failure, our team is here to help.

441 Diesel

127 State Highway 164

Commerce, GA 30529

Call: 706-677-0060