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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 袁春凤 (Tiffany)
The mechanism of cavitation is surface fatigue damage caused by impact force, but the chemical and electrochemical action of liquid and abrasive inclusion in liquid may accelerate cavitation damage. For example, the cylinder liner cavitation is caused by the action of piston lateral thrust because the combustion pressure in cylinder varies with crankshaft angle. The elastic deformation and high-frequency vibration of bubbles produce great impact force (tens or even tens of thousands of high pressure) and high temperature (hundreds of degrees) at the instant of collapse, and the collapse speed can reach 250m/s.
Feilong jiangli will update analysis of more auto parts failure models.
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.
Advance Auto Parts, Inc. (NYSE: AAP) has acquired the DieHard brand from Transform Holdco LLC (“Transformco”), for $200 million utilizing cash on hand.
“We are excited to acquire global ownership of an iconic American brand. DieHard will help differentiate Advance, drive increased DIY customer traffic and build a unique value proposition for our Professional customers and Independent Carquest partners. DieHard has the highest brand awareness and regard of any automotive battery brand in North America and will enable Advance to build a leadership position within the critical battery category,” said Tom Greco, president and CEO, Advance Auto Parts. “DieHard stands for durability and reliability and we will strengthen and leverage the brand in other battery categories, such as marine and recreational vehicles. We also see opportunities to extend DieHard in other automotive categories. We remain committed to providing our customers with high-quality products and excellent service. The addition of DieHard to our industry leading assortment of national brands, OE parts and owned brands will enable us to differentiate Advance and drive significant long-term shareholder value.”
AmazonBasics High Mileage Motor Oil - Synthetic Blend
AmazonBasics high-mileage synthetic-blend motor oil offers an enhanced level of protection for engines over 75,000 miles. Its synthetic blend combines conventional oil with synthetic for cost efficiency with some of the benefits of a full synthetic. An important part of routine maintenance, the motor oil works well for anything from topping off levels to complete oil changes. Whether it’s a beloved older vehicle or one with an uncertain maintenance history, help protect its engine with AmazonBasics high-mileage, synthetic-blend motor oil.
When selecting parts for a car repair, it pays to know the differences between original and aftermarket parts. Whenever possible, get estimates for both.
Choosing between original and aftermarket car parts — and even used parts of either type — is all about squaring your priorities with your budget.
You’ll have different options depending on the part and the shop. And the best choice will depend on whether you’re trying to keep repairs cheap, restore your car’s appearance after a wreck or soup up your ride.
Original equipment manufacturer (OEM) parts match those that came with your car, and are of the same quality as its original parts. They’re also the most expensive.
The factory-recommended replacement intervals for filters can vary quite a bit depending on the year, make and model of the vehicle, as well as how it is driven. As a rule, older vehicles (those more than 15 to 20 years old) typically have more frequent service intervals than newer vehicles. Why? Because late-model vehicles require less maintenance, thanks to improvements in motor oils, transmission fluids, engine design and filter media.
Many long-life air and oil filters use synthetic fiber media or a blend of cellulose and synthetic fibers to extend filter life.
Changing the oil and filter every 3,000 miles was standard practice decades ago. But it’s no longer necessary because most multi-viscosity oils today are a synthetic blend or a full synthetic that resist viscosity breakdown and oxidation for a much longer period of time. Late-model fuel-injected engines also run much cleaner than their carbureted ancestors, which reduces oil contamination in the crankcase.
Air filters, cabin air filters, oil filters and (sometimes) fuel and transmission filters are important maintenance parts that typically are replaced according to a time and/or mileage schedule. A vehicle’s service schedule recommendations can be found in the owner’s manual or in a separate brochure. Unfortunately, many motorists never read – or totally ignore – the recommendations.
Factory service schedules are designed to prolong the life of the engine, transmission and cooling system, to reduce premature wear and breakdowns, but also to minimize maintenance costs while the vehicle is still under warranty. That’s why factory oil change recommendations have been stretched to 7,500 to 10,000 miles or more on many late-model vehicles. Most late-model cars and light trucks no longer have recommended change intervals for transmission fluid and filters, or for fuel filters. These so-called “lifetime” fluids and filters are supposed to last a long time – but they won’t last forever. Experience has shown that “lifetime” filters and fluids don’t live up to the hype.
Fuel filters always should be replaced when a fuel pump is replaced (unless the filter is part of the fuel pump module assembly). Likewise, transmission filters should be replaced if a customer is changing the fluid in their transmission.
Last Line of Defense Against Contaminants
Filters are the first line of defense against contaminants. Air filters keep dirt and abrasive particles out of the engine. A good-quality air filter will trap about 98 percent or more of the particles that can cause trouble inside an engine. As the filter media becomes saturated with dirt, it’s efficiency actually increases. But, as the filter becomes clogged with more and more dirt, it also becomes more restrictive to airflow. The greater the pressure drop across the filter, the more it hurts performance and fuel economy.