Automotive Engine Rebuild

Symptoms

The vehicle was purchased with a noticeable ticking noise from the engine and excessive oil consumption. It was also stuck in limp mode and would not rev past approximately 2500 RPM. Despite these issues, the engine ran smoothly and the car could still reach highway speeds, suggesting the problem was isolated rather than a complete mechanical failure.

Diagnostics

A check-engine scan revealed a “fuel rail pressure low” code. The low-pressure fuel pump was tested and confirmed to be operating within normal pressure range. A compression test was then performed, and all cylinders showed normal readings. Since compression was healthy but oil consumption remained high, this pointed toward worn valve stem seals as the most likely source of oil entering the combustion chamber.

The repair began with replacing the high-pressure fuel pump to address the fuel rail pressure fault. The engine was then disassembled to remove the cylinder head so the underlying oil-consumption issue could be addressed. While the engine was apart, several supporting components were replaced, including the lifters, head gasket, timing chain, chain tensioner, timing guide, and all associated gaskets. The water pump and thermostat were also replaced, and all fluids and filters were changed before reassembly. After the rebuild, the engine ran smoothly with no ticking noise and no check-engine light.