What should be monitored closely after an engine overhaul during the break-in stage?

Monitoring oil pressure and coolant temperature closely after an engine overhaul during the break-in stage is crucial for several reasons.

First, oil pressure is vital for ensuring that all moving components within the engine are adequately lubricated. After an overhaul, the engine components are being re-seated and may experience varying levels of friction as they adjust. Low oil pressure can indicate inadequate lubrication, which could lead to increased wear or potential engine damage.

Coolant temperature is equally important as it helps to manage the operating conditions of the engine. During the break-in period, the engine may generate more heat due to increased friction and the settling of components. If the coolant temperature rises too high, it can indicate that the cooling system is not functioning properly or that the engine is running too hot, which may also lead to overheating and damage.

In contrast, while fuel efficiency and tire pressure are important aspects of vehicle maintenance, they are not as critically affected during the initial break-in phase of an engine overhaul. Monitoring brake fluid levels and transmission fluid is also significant for overall vehicle operation but does not directly relate to the immediate concerns of the freshly rebuilt engine. Observing engine color and overall appearance does not provide actionable insights into engine performance and health during the break-in process, hence it is