In the winter should pay attention to the engine maintenance

The temperature is gradually cool, autumn’s footsteps approaching in the imperceptibly, winter cold is undoubtedly a severe test for automobile parts, want the car safely through the winter in autumn must be comprehensive maintenance on the. Currently on the market of automobile maintenance product variety, quality uneven, some good and some bad, owners tend to see things in a blur I do not know how to choose. For the automobile deep maintenance products, select a reliable with good reputation of the brand is very important. Unlike the summer heat insulation, winter maintenance should pay attention to the main engine maintenance and maintenance, the timely removal of carbon deposition, the replacement of antifreeze and select the appropriate oil, second air conditioning cleaning and brake maintenance are matters before winter car maintenance needed to pay attention to.
Various types of engines in the work, because of the influence of related factors, are more or less carbon deposition. Coke is a product of fuel or lubricating oil is formed in the high temperature and oxygen under the action of. The cylinder cover parts of the coke, will reduce the cooling effect of the engine. Because the thermal conductivity of carbon 1/50 range, its thermal conductivity is only cast iron or steel, it will cause overheating of the engine, the engine performance and fuel economy are greatly reduced. The top of the piston deposits, a hot surface, cause preignition and detonation, knock, knock and abnormal wear, shorten the service life of the engine.

In addition to the usual for the car to do maintenance can reduce the carbon production, regular cleaning is to extend the life of the vehicle, in terms of cleanliness should choose must use special engine cleaning agent, such as a high performance engine 3M carbon removal agent (PN08989), it can restore the shape of combustion chamber, the fuel, air, ignition timing and combustion path between the balance recovery, reducing the compression ratio, avoid knock or pre abnormal combustion phenomenon, the phenomenon of improved cold start is not smooth, unstable idle speed, fuel consumption, knock and insufficient horsepower.

In the winter should pay attention to the engine maintenance, also can not forget the car details maintenance. After the winter, automobile air conditioner is used less, the refrigerant in the air-conditioning stopped working after hydration. Separated in the refrigeration system, fluoric acid generating strong corrosivity, evaporator, condenser corrosion of metal parts. Again after the summer, dust will retain more air-conditioning air duct, air humidity and the summer is relatively large, will cause the air passage is wet, it will cause a lot of mold. Cleaning will affect driving indoor air quality. If not, it may cause respiratory system disease.

For the air-conditioning system of cleaning, recommend the use of 3M professional automotive air conditioning system cleaner, the air conditioning evaporator which mainly in cleaning the car, dirt adhesion in the evaporator of dust, dirt, bacteria survival of lipid nutrients, odor source, to provide protection for you and your family’s health. At last, car tools like Launch X431 and GM Tech 2 Scanner may help you more!



The vehicle maintenance tips on the rainy day

Wading height depends mainly on the car itself factors, and a car of their own design also has a great impact, including ground clearance, wheel radius, the exhaust pipe, the inlet height, then how models can have better fording ability?
The wheel half: this number is half the height of the vehicle tire numerical reference factors, is a wading ability.

The exhaust pipe height: all the time, people think that once the water more than the height of the exhaust pipe, will put water into the engine to stall, in fact is not like this, because the engine to produce the enormous pressure in the exhaust, enough to intrusion into the exhaust pipe of the water out. Vent height can intuitively reflect the level reached much water, not only in uniform through the water will appear when the inverted water.

The inlet height: This is the ultimate value of wading vehicle, once more than this value, the water will directly lead to flameout, in more serious cases, will be the water sucked into the engine and cause permanent damage. Therefore, this value is absolutely reliable “rain” index based on.

Rainy day, the owners often encountered engine not easy to start trouble, sometimes barely started up, and the feeble. This problem may be the largest leakage from the ignition system for wet and produce. In addition, may be a rainy weather is cool, and a small flood in the hot air distributor plate may condense into droplets and composition of disk, and thus the loss of ignition function.

Humid environment in the rainy season, also let the car circuit fault. This failure is often caused by two situations, one is the fuse burned out, one is the circuit fault pure.
Want to avoid the car circuit problems, the most important point is to avoid the installation, modification. Because, in the process of installation and modification of the whole car circuit, the voltage and current are changed, in this case, once the line heat, moisture, it is very easy to generate fault.

To solve this problem, usually with various control devices on the car, once found because the ignition system ignition failure, humidity and the engine performance decline, it is best to use dry towel or dry cloth to the distributor and wire wipe, and then use special desiccant spray in the distributor cap, battery joint, the spark plug and ignition coil, high-voltage wire with a desiccant spray cans, etc. after a while can start the engine. And stalled in the water, never again to start the engine, so as not to damage the engine circuit.

If your car is a new car, the rainy season chassis maintenance could spend less time. For the new car in the factory before, have already done some rust treatment. While some age longer, and some had a major accident car, we need to pay special attention to maintenance work chassis.

Before the rainy season, can consider to give the car a chassis rust treatment, if conditions allow, can be armored chassis. So not only can protect the tank and other devices, but also to rust, sound insulation, collision avoidance action.

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Lock-up clutch failures on vehicles equipped with automatic transmission will have a huge impact

Common faults of lock up clutch: lock up clutch engagement, not separation, not poor bonding and slipping. Multiple fault phenomenon is diverse, so to grasp its working principle, characteristics and the method of fault analysis is very important.
First, the road test, the vehicle without the law appear jitter between 40 – 80km / h. The first detection of the engine, but found no fault. This may be caused by other factors. So the computer detecting instrument reads the data flow, found that when the locking clutch (TCC) joint, especially the ground station to the 40% – 60%, the vehicle will appear jitter phenomenon. The fault is composed of TCC binding caused by bad. But the results are caused by bad and which part?Fault may lie electronically controlled, hydraulic and mechanical systems which part. Of course, there are some special circumstances, such as when the throttle is closed, apply the brakes, acceleration or deceleration, shift, oil temperature below 60 ℃ Rotary temperature is too high and gear in the following block 3, etc., because these time lock the clutch is engaged.

The locking clutch engagement and separation by computer (PCM) through the lock up clutch (TCC) to control electromagnetic. Computer analyzed according to the solar term door position sensor, speed sensor, a turbine shaft, gear shift moment sensor, and brake switch signal, to the TCC electromagnetic valve provides a duty cycle signal, changed the TCC electromagnetic valve opening, thereby controlling the action of clutch. For the TCC work, computer is through the rotational speed of the engine and the turbine shaft (input shaft) of the speed difference to monitor.When the locking clutch does not work, the engine speed should be greater than the turbine shaft speed is 200 300r / min; in the lock up clutch engagement process, both the differential speed should be reduced gradually; when the locking clutch is completely engaged, the rotational speed difference should be zero. Therefore, can be observed through the engine speed and the rotational speed of the turbine (input shaft speed difference between the clutch) to determine the working state and extent.

On the hydraulic part of the fault can be determined by measuring the hydraulic pressure. So this car gearbox oil pressure test carried out. Road test, jitter occurs when the TCC engagement and found no oil pressure fluctuations and anomalies. To further determine if this part is faulty hydraulic transmission, fold down the valve and install test template, using compressed air to be tested. The results showed that the TCC various hydraulic valves and valve oil works well, the hydraulic part of the fault can be basically ruled out the possibility.

As for the mechanical part, due to the inability of dismantling, so only through the exclusion of other aspects of the failure to determine. The detection and analysis of the above several aspects, determine the fault is likely only in mechanical parts, namely the torque converter lockup clutch.

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