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Generator Blog — breakin

Diesel Engine Break-In Period

Diesel Engine Break-In Period 0

*This applies to ALL engines, not just diesel.

The ultimate goal of a "break-in" period is to allow machined surfaces in the engine combustion chamber to conform to each others shape. "Break-in" helps to creates a tight seal that is essential to preventing the escape of unburned fuel and pressurized gases from entering the crankcase. It also prevents engine lube oil from getting into the combustion chamber. It is perfectly reasonable and acceptable in new engines to see some small amount of engine oil consumed. While it is acceptable at first, it is essential that this loss of engine oil does not continue after the engine is broken-in. 

For a break-in to occur, a moderate amount of