Running in a new engine (Opel Vectra B)

The cylinder walls, as well as the pistons and piston rings, have microscopic roughness on their surfaces when new. These small irregularities can only be eliminated by the running-in process, during which the parts begin to fit together well. Too sharp an increase in the speed of a new or reconditioned engine can lead to tiny scuffs in the metal, which under certain circumstances can lead to fatal piston scuffing.

In terms of engine longevity, you will do well to heed Opel's instructions for the initial period of operation. During the first 1,000 km, the maximum speed should not exceed 4,000 rpm. The basic rule for all gears; press the gas pedal no more than three quarters of the way.

During the running-in period, the engine feels best on country roads. There, they drive at different speeds and can diligently change gears. There will be no obstacles to movement even if the speed limit recommended at the beginning is observed. From 1,500 km, you can calmly increase the engine speed once. Autobahn slopes are especially suitable for this: down at relatively high engine speeds, without loading it too much. Although the engine must be well warmed up for this, since later it should only be accelerated when the operating temperature has been reached.

Until the engine is properly run in, it will last at least 3,000 km. With predominantly urban traffic, this continues, of course, much longer.

Advice: What was said about a new engine applies even more to an engine that has undergone a major overhaul, which, as practice shows, reacts even more painfully to improper running-in.

Article posted on a web portal: OPELBOOK