alam_elsyarat

02/05/2026

Important Information:

https://m.facebook.com/groups/511538902354162/
Tires have an expiration date printed on the sidewall. For example, if you find the number (1415), this means the tire was manufactured in the 14th week of 2015. The recommended lifespan is two to three years from the date of manufacture.

Each tire has a specific speed rating.
The letter L indicates a maximum speed of 120 km/h.
M indicates 130 km/h.
N indicates 140 km/h.
P indicates 160 km/h.
Q indicates 170 km/h.
R indicates 180 km/h.

H indicates speeds above 200 km/h. Unfortunately, many people buy tires without knowing this information, and even worse, most shop owners don't know it either. Here's a picture of a car tire:

3717: This means the tire was manufactured in the 37th week of 2017. The letter H indicates that the tire is rated for speeds exceeding 200 km/h.

11/04/2026

CVT Transmission

https://m.facebook.com/groups/511538902354162?ref=bookmarks

A CVT transmission consists of two pulleys connected by a sliding belt (metal or rubber). The pulleys change diameters so that one represents the smaller gear and the other the larger gear, thus determining the different gear ratios.
* Advantages:
- Infinite gear ratios, which delivers optimal engine torque at the correct ratio.
- The engine operates smoothly and doesn't always rev to its maximum power.
- Good fuel economy.
- Extremely smooth shifting. So how do the pulleys change diameters if there are no gears inside?

A conventional automatic transmission has actual gears with fixed values.
In a CVT, however, there are no fixed values; the value is determined based on the situation and your acceleration.

As you can see from the pictures, each gear is essentially two cones facing each other. Bringing the cones closer together increases the gear diameter, and moving them further apart decreases it. This is how the transmission controls the gear ratios. So, how exactly do the cones of each gear move closer and further apart to change the gear ratios?

When we press the accelerator pedal, we want acceleration. The drive wheels move closer together or further apart to achieve the optimal acceleration ratio. Now, let's look at how the two cones on each wheel move. This is achieved through oil pumps.

The oil pumps in newer generations of Xtronic CVTs (like the one in Nissan) have been modified to be smaller and have higher pressure. This makes gear changes 20-25% faster than previous generations, reducing gear adjustment time and minimizing the rubber band effect (a common complaint among those unfamiliar with the transmission). This effect occurs when you press the accelerator hard, causing the engine noise and RPM to increase before the transmission engages and the car accelerates.

Using the new oil pumps greatly reduced this feeling because previously there was a significant lag (this is the nature of the transmission; it needs a few seconds to determine your needs and calculate the optimal acceleration and fuel consumption ratios). Now, let's get to the most important part... How do we use a CVT transmission?

When we press the gas pedal hard, the engine responds instantly, increasing its sound and RPM. The problem with CVT transmissions is that they don't have fixed gears; instead, they adjust their gear ratios based on your pedaling (as mentioned above, the optimal gear ratio with fuel consumption). This is where the delay lies. As long as you're pressing the gas pedal, the transmission is constantly shifting until it determines the torque you're aiming for. This causes a delay in acceleration because the current usage is incorrect. (The transmission doesn't understand your intentions because it calculates from the very first pedal press. Each time you press a little harder, it makes calculations; the more you press, the more it calculates for the next press, and so on.) The solution is to press the gas pedal a certain amount and then hold it down momentarily. This gives the transmission a chance to quickly understand the situation and adjust itself. You'll find the engine sounds quieter, its RPMs slower, and it starts to provide optimal engine response and fuel efficiency. For this pedal... and then you pedal again or press a little harder, and it readjusts itself to the new setting based on the new pedal, giving you the best response to the new pedal, and so on.

In other words, instead of pressing the gas pedal from first to last in one go, which makes the engine louder without a quick response from the transmission... instead, press it in stages so the transmission can follow the acceleration stages with you, and you'll find its response is faster and its preparation time is shorter, with a quieter engine sound and better fuel consumption. In other words, instead of making it shift from first to sixth gear in one go and then delaying it until it goes through all six gears in a row... instead, let it shift from first to third gear as a first stage with the first pedal, and then shift from third to sixth gear as a second stage with the second pedal. This way, you'll find the engine sound is smoother... the RPMs are lower... the transmission response is much faster and less... What is possible in terms of consumption.

Okay, some people say that the CVT in other cars has less delay than this!

I'll tell you that's true because, as we explained, there are modern CVT transmissions where the oil pumps have been replaced with newer ones, which reduces the delay.
The second thing is that CVT transmissions are almost all mechanically similar, but the transmission software differs. Each manufacturer uses a specific software version developed by them. That's why we find four-speed CVTs, six-speeds, and so on. However, this transmission actually has an infinite number of gears, and the specific number of gears is determined by the software.

That's why we find differences in response delay from one car to another, but the principle and method of operation are the same.

09/04/2026

When you're sitting with your friends talking about the power of a particular car, and the topic of engine power comes up.
https://www.facebook.com/groups/511538902354162/?ref=share_group_link
And you don't know how to participate in the discussion because the basic terms don't know what they mean. Or when you want to buy a new car and the sales person tells you about the difference between engines of the same class, and you also don't understand the explanation because the basic terms don't know what they mean.

What is CC?
CC is the liter capacity of the combustion chamber of an engine. The word or symbol CC is an abbreviation for cubic centimeter in English.
CC =Centimeter Cube
The bottom line is that CC is the liter capacity of the engine, for example, we have a car engine with a capacity of 2000 CC and consists of six cylinders, which means that each internal combustion chamber in this engine is 333.3 cc in volume
What does the number of horses in an engine mean?
Number of horsepower in an engine: HP = HorsePower is the unit of measurement of power and torque, i.e. the kinetic energy of a car. There are many who associate the liter capacity of the CC engine with the number of horsepower in an HP car, which is wrong.

21/03/2026

Globally, every year --- about one million three hundred and fifty thousand people die on the road and about 20 million are injured at least and economic losses reach 520 billion dollars - ------)----))))
https://m.facebook.com/groups/511538902354162/
But the surprise is that these losses do not occur equally in countries, as about 92% of car and vehicle accidents occur in developing countries that lack many things in the road safety system -- and some think that the elements of this system are limited to building and expanding roads only - - - - One of the reasons for the recurrence of car accidents is that traffic departments in these countries do not apply the method of scientific investigations of accidents --- to reach the main causes, but they are satisfied with reaching the apparent and superficial causes just to fill a box in the accident file - - - And if the experts reach the main causes, there is no management and will to implement corrective measures - - - issued by the World Health Organization Safety reports Ways

02/03/2026

Important Information...

https://www.facebook.com/groups/511538902354162/?ref=share
For those with automatic cars, if you hear a clicking sound when shifting into reverse (R) or drive (D), it could be due to a broken or cracked engine mount, transmission tensioner, or axle bushing. It could also be due to the control arm bushings, though this is less likely.

- If you hear a clanking sound while driving, it could be due to a broken or cracked engine mount, transmission bushing, brake pads, rotors, or dust cover.

- If you experience tire blowouts while turning and hear a repeated clicking sound, it could be due to the outer CV joints.

- If the car vibrates between 60 and 120 kilometers and then disappears, it could be due to the inner CV joints.

- If there is vibration at high speeds, it could be due to the tires, rims, wheel alignment, or balancing.

- If there's a rattling noise in the steering wheel at low speeds and on rough surfaces, check the steering box and the inner and outer tie rods.

- If there's a rattling noise from underneath the car at low speeds and on rough surfaces, check the front and rear control arm bushings and the stabilizer bar bushing.

- If you hear a squealing sound while turning the wheels, check the strut mounts and strut bearings.

- If you feel a rattling noise under your foot when you press the brakes, check the brake pads and rotors.

- If you hear a whistling sound from the wheels, check the brake pads and rotors.

- If you hear a whining sound from the wheels, check the wheel bearings and hubs, and also check the tires, rims, wheel alignment, and balancing.

- If you press the brakes and the car doesn't engage, check the brake pads, rotors, brake fluid system, and tires.

13/02/2026

Motor life: https://m.facebook.com/groups/511538902354162?ref=bookmarks
First, we need to understand a few things
The bastam is a cylindrical part inside the motor of the car and we all know it, of course, and in order to approach the explanation, we will consider it as a cup, but hold this cup upside down, this is the shape of the bastam.
It is available on some 3, 4, 6 or 8 motors. And this is what we call a 4 cylinder car, a 6 cylinder car, and so on..., and the piston keeps moving up and down along a cylindrical tube also called the shirt (shirt). To prevent the piston from eroding, three rings are placed in the middle of the piston, one of them wide. It is small and has holes, and this is the oil spring, and this is responsible for scraping the oil from the shmeez and not leaking the oil to the top of the surface of the basmati, i.e. into the combustion chamber.
The core of the piston itself is an arm called the connecting rod (the piston), which has two upper ends of a small diameter installed in the piston, and a lower one of a large diameter that holds the crankshaft and is responsible for converting the reciprocating movement of the piston into a circular movement used to move the car.
When the oil bezel or the chimney or both is eroded, the oil leaks upward into the combustion chamber and burns with the combustion components of air and gasoline, and thus the motor starts consuming the oil and the exhaust of the car meets a bluish outside as a result of the combustion of the oil.
If the problem of the motor is a loss and consumption of oil only, this means that we need a suspension kit and salvation.
But if there are strange sounds inside the motor (implantation), this means that there is erosion in the crankshaft and the oil cam, and therefore here we are talking about a complete Umrah, and this will need:
1- Mathematics: the shafts/blocks for the shafts/camshafts/crankshafts/fuel and exhaust valves and making bases and guides.
2-Change: the alloy for the crankshaft / the pilings / the spring kit / the piston kit

27/12/2025

Big shout out to my newest top fans! 💎 توفيق محمد رعدان

Drop a comment to welcome them to our community, fans

26/12/2025

What is the difference between crossovers and SUVs?
It was definitely the beginning of an SUV, then the global mood shifted with the rise in the price of gasoline and the growth of infrastructure and road paving. It became clear that many SUV owners simply did not need the heavy-duty towing or the ability to go off-road on a weekly basis. In addition, these cars lacked a modern design. Other than the high prices and the costs of owning it, such as periodic maintenance, fuel consumption, and registration of plates.

Conventional SUVs are built in a Body-on-Frame method, while crossovers are built in the same way as regular cars using a Uni-Body.

The economic factors pushed the auto industry to move operations and deal with similar SUVs with the aim of obtaining similar benefits from SUVs while avoiding its shortcomings and giving up its unique strength. The crossover car industry began and marketed it as:

Relatively efficient cars (compared to an SUV)
Cars with a more modern design (as an alternative to family minivans)
Vehicles with soft suspension and luggage, designed for on-road use (as opposed to SUVs)
A good alternative for families who want a bigger payload than a sedan
Cars with complete accessories and equipment with relatively low prices
Cars that are able to provide some features such as four-wheel drive vehicles, such as the seating of the third row, the ability to tow, the simple towing, the elevated seating position, and the distance from bumps and rough roads.

These franchises have already succeeded in crossing and supporting the automotive sector by raising sales. Today, we find that the growth of small and medium crossover cars exceeds SUVs of all sizes...

17/12/2025

22/11/2025

Ordinary water problem in use to cool the car and identify the colored water:
https://m.facebook.com/groups/511538902354162?ref=bookmarks

First, there is the percentage of salts and Ptbaky from 150 to 500 mg and salts Pttrakm on the surface and in contact with her Ptaml to eat at intervals and of course all Mptsud Mieh in Bagpipes hard-Lanta Ptsud Salts Tani ratio on the radiator and Ptsud corrosion. ....

The problem Altanih over time erosion Baady that the reaction to the radiator Asdy Maiya with iron or copper
Here says much good if I knew Agip water distillery and of course, free from any Ptbaky Salts remains the salvation of Mesh Hibaki I have a problem in corrosion ....

Unfortunately, not because the water-free salt water Ptbaky closer to the acidic and of course friendly Ptnhr in the radiator is keda uniform like this before that what you mention iron or copper Batvaal with any Mieh whether it was Salts or not Basdy over time
Finally boiling point not exceeding 100 ° C

Negi water colored GENERAL:

1. Ptbaky Mieh pillory Mvihash any proportions of salts Bs Mtaaljh Ashan Mtconcy closer to the acidic and Mtdhav the proportion of ethylene glycol guardian inhibitor freeze Petrf boiling Mieh degree

From 100 to 107 ° C if Mafeesh pressure from the cover Bagpipes
From 100 to 130 degrees Celsius if Bagpipes cover airtight compressor kid so Benninsah to ensure that the cover Bagpipes Original Mesh factorial.
The scientists have discovered what raises the pressure to the level of a very high standard of accommodation reached boiling point as possible to 198 ° C

2. There is a water colored small percentage of a substance called (sodium nitrite) Article Friendly Ptaml isolate any iron or copper works to be covered Ashan Mutenharc friendly idea of corrosion inhibitors in which material friendly Bs in high concentrations and of course in other materials Bs friendly months material in them.
3 Ptbaka where additions Tanih special color and materials for its comparative water pumps.

In an important need to focus Tanih material itself .... most Arab focus of the most suitable matter is 50/50 means 50% with the quality of the pressure cover Bagpipes Baousel boiling point to 130 degrees ....... increasing concentration to 70% Perfa to the boiling point 135.5 degrees

Medicine if the concentration of more than 70% ..... Unfortunately Hihsal mesh cooling because the material itself Mbnbardash necessary Taatkhalt Distilled water violin works problem Tanih that the viscosity of water and Htzad Trmbh mesh Htkdr and injected in the volatile radiator pipes.

Since we are in a relatively warm area we follow the focus of the first 20% is very enough because we Mbenouselh to cold temperatures to freezing