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By Jacky Xine
In last November, the much-anticipated Wrangler pickup Jeep Gladiator officially debuted at the Los Angeles International Auto Show. According to Jeep's plan, the new Gladiator will be officially delivered in the second quarter of this year. Recently, some foreign media reported that in addition to the three models already launched, Jeep will also launch a high-performance version of the gladiator.
By Mengjuan Zhu
According to the different driving mode, the pump is generally divided into mechanical pumps and electric pumps. Most of the engines now use mechanical pumps, and electric pumps have been used in some newly developed, technologically high engines, such as the BMW 6-series (E63) engine.
The mechanical water pump is driven by the engine crankshaft through the driving tape, and its rotational speed is proportional to the engine speed. The working methods of mechanical pumps have both advantages and disadvantages. When the engine is working under high speed and heavy load conditions, the heat produced by the engine, the high speed of the pump makes the circulating flow of the coolant increase, so that the cooling capacity of the engine can be improved. When the engine is working under low speed and heavy load, such as traction other vehicles or open air conditioner, the engine speed is low and the speed of pump is low. , which lowers the engine's cooling capacity.
Electric water pump has brushless electric pump and brush electric pump. The electric pump is controlled by the engine control unit through the current, which is not affected by the engine speed, and can be flexibly operated according to the actual cooling of the engine. Because the electric pump consumes very little engine power, the fuel consumption of the engine can be reduced after the electric pump is used.
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By Mengjuan Zhu
When the pump is damaged, we should pay attention to the following items when replacing.
（1） The real cause of the pump damage should be clear. Before replacing the pump, the radiator fan, thermostat and coolant should be determined.
（2） It is likely that pumps with similar shapes but suitable for different types of engines will occur, so before installing the pumps, a comparison should be made between the new pump and the old pump removed, or a check should be made on the part number of the pump and the type of the engine to determine whether the selected pump is suitable for the model being repaired.
（3） Water pump installation surface should be carefully cleaned and leveled.
（4） When installing the pump, wet the seal ring with coolant first. If you need to use sealant, be careful not to apply too much.
（5） Do not use the way of percussion pump shaft to install the pump. You should check the real reason for the difficulty of pump installation. If the excessive scale in the cylinder water channel leads to the difficulty of pump installation, steel wire brush or fine sand paper should be selected according to the scale situation. When installing bolts in water pumps, they should be tightened progressively in the direction of diagonal according to the prescribed torque, excessive tightening of bolts or causing damage to gaskets.
（6） The tension of the pump belt must be strictly controlled according to the adjustment standard. Excessive tension of the belt, will cause bearing overload operation and early damage; and too small tension, easy to produce noise, serious pump can not work properly.
Feilong Jiangli warm notes: If you can't replace it by yourself, please go to the warehouse.