[Maintenance operations] 15 Mercedes-Benz E260 walnut sand cleaning valves_vehicles, vehicles

[Maintenance operations] 15 Mercedes-Benz E260 walnut sand cleaning valves

September 5, 2024

Recently, the temperature dropped in the north, and I felt that the fuel consumption on the way to and from work was high. After clearing, the urban roads were driving normally. The fuel consumption per way reached 13 liters without traffic jams. When accelerating at low speeds, I felt like I couldn’t use it. It was very meaty.

Remove the air inlet pipe

After tearing it down,

Carbon deposit on cylinder 4

Carbon deposit on cylinder 3

This is the No. 2 cylinder that has not been closed, and there is a thick layer of carbon deposits on the valve stem

Carbon deposit on cylinder 1

The intake valves of 4 cylinders have been blocked with a large amount of carbon deposition

The valve is closed, and the walnut sand looks after cleaning. There is walnut sand residue

Finally, use compressed air to blow out residual walnut sand

After cleaning, the fuel consumption of the odometer was cleared and the fuel consumption was recalculated. The fuel consumption for the same journey dropped from 13 to more than 9, less than 10 oils, and the very fleshy feeling when accelerating at low speeds also disappeared.

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[Maintenance operations] 15 Mercedes-Benz E260 walnut sand cleaning valves