Probably, many have noticed that the temperature of turning on the fan on engines latest generation VAZ 2110 -2112 (100-105 C) is too high for the normal operating temperature of the engine (85-90 C).
First of all, this introduction is connected with the manufacturer's struggle for cleaner exhaust from the pipe of your car (requirements modern standards euro 3 and above). At this temperature, more complete combustion fuel and its constituents.
But it should be noted that, as always, this positive side for one aspect brings something negative for another. So, with a slight, but still overheating of the engine and head, irreversible physical and chemical processes occur in the metal, which ultimately affects the overall final operation of the engine hours. power unit. Apart from the fact that in the event of a failure of electrical components that affect the turning on of the fan, the time to notice this at an overestimated temperature of the nominal switching on of 105 C to overheating of 125 C will be much less than from normal operation to overheating.
For more uniform and controlled operation of the engine, it is proposed to do parallel circuit turning on the fan. A positive contact is always connected to one of the fan contacts, and for the second negative contact, it is proposed to connect via a parallel wire with a switch according to Fig. 1.
Figure 1 Electrical circuit diagram for connecting a radiator fan VAZ 2110 2111 2112
Figure 2 Wire connection point in engine compartment to turn on the radiator fan VAZ 21102
Figure 3 Alternative location for installing the radiator fan switch VAZ 2110 2111 2112
After implementation this decision it only remains to mention additional features control operating temperature power unit with all subsequent positive arguments given above.
PS Many, due to the prevailing conservative views, may have the idea that in wiring diagram a relay is required to turn on the cooling fan. I am against excess and I can say that in order for the circuit to work, it is enough just to have a powerful switch rated for a current of at least 20 A for 12 Volts, that is, 240 watts (such switches are on sale - for example, 220 Volts 16 A, as in Figure 3, that is, at 3520 watts) This scheme has been successfully operating on a VAZ 21102 car, manufactured in 2001, for 3 years already. In addition, it should be noted that this method is not a replacement regular scheme operation of the radiator fan in the car and is intended only as an alternative solution for running the engine at more than low temperatures controlled directly by the driver.
In any case, if the engine overheats, even if you have implemented the principle described above, still check the cooling system and ensure it is in full working order.
Emergency actions in case of overheating of the engine cooling system while driving.
At the first sign of overheating, if the arrow of the temperature gauge has gone into the red zone, but no clouds of steam escape from under the hood, turn on maximum mode interior heating. This is necessary in order to reduce the temperature of the coolant in the engine cooling system.
Turn on alarm, depress the clutch pedal and, using the momentum of the car, try to carefully move to the edge of the carriageway and stop as far to the right as possible at the curb, and if possible, outside the carriageway. Let the engine run for a couple of minutes at normal speed. idle move with included on full power heater, do not turn off the engine immediately. Open the hood and inspect the engine compartment.
After the overheated engine stops, local overheating of the coolant begins at the points of contact with the most heat-stressed engine parts and the formation of increased local overheating. In addition, it is better to start the car for 10 seconds after 2-3 minutes, so that the new volume of coolant begins to contact the engine parts.
Determine where the steam is coming from, if any. When inspecting the engine, pay attention to the presence of coolant in expansion tank(be careful not to burn yourself), on the integrity of the rubber hoses, radiator, thermostat.
Look under the dashboard from the side front passenger in the passenger compartment and find out if there are any leaks or traces of coolant flowing from the heater radiator under it.
If coolant leaks are found, a burst hose can be temporarily repaired with adhesive tape or band-aids from the first aid kit.
A radiator, thermostat or heater leak is quite difficult to fix on the spot, so in such a situation it is necessary to add water to the cooling system and carefully monitor the temperature gauge while driving, periodically restoring the level in the cooling system.
The engine can overheat if the thermostat fails, which controls the flow of fluid in the cooling system through the radiator or in addition to it (to accelerate the warm-up of a cold engine). To check the thermostat, on a warm engine, check by touch the temperature of the hose connecting the thermostat housing to the radiator. If the hose is cold, the thermostat is faulty and there is no circulation through the radiator.
Very often, the cause of overheating of the engine, the cooling system of which is equipped with an electric fan, is the failure of the fan. Start the engine, monitor the temperature and note if the cooling fan turns on when the engine overheats.
If the fan does not turn on, the fuse may have blown, the turn-on relay may be faulty, the motor may have burned out, or the wiring may be faulty.
Check the integrity of the wiring, the reliability of the connection of electrical connectors.
If the wiring is OK, check the fuse and replace it if it is defective.
If the fuse is good, try replacing the fan relay.
If the fan still does not turn on, check the motor. To do this, take two additional wires and power it directly from battery. Wires must be securely fastened and insulated.
If the electric motor started to work, the wiring is faulty; if not, the wiring or the motor itself is also faulty. The relay and motor are not repairable, replace them as an assembly.
VAZ 2107 is equipped with an electric radiator cooling fan. It automatically turns on when the coolant is heated to 90 degrees and in normal conditions ensures a stable engine temperature regardless of air temperature and driving mode.
But there is one problem. Sometimes the relay (sensor) for turning on the fan breaks down and radiator fan VAZ 2107 does not start. As a result, the engine overheats and the matter, in best case, is limited to boiling and leakage of coolant, and at worst - overhaul engine. To avoid problems, you can improve the design by organizing forced airflow to the radiator. There are two ways to do this: mechanical and electrical.
Mechanical forced cooling of the radiator VAZ 2107
On older VAZ models, the radiator was cooled by an impeller mounted on the water pump rotor. This solution provided a constant cooling of the radiator when the engine was stuck. Considering that the design of the VAZ 2107 differs little from its "predecessors", it will not be difficult to install such an impeller.
The advantage of such a solution is reliability. Forced mechanical cooling of the radiator ensures that the car does not boil while standing in a traffic jam on a hot day. But at the same time, the efficiency of blowing at low speeds is reduced in comparison with electric blowing. In winter, another disadvantage of forced cooling manifests itself - cold engine additionally blown by a fan, which slightly slows down its heating. The fact that the fan blows over the radiator on a cold engine does not affect the warm-up rate in any way, provided the thermostat is running. The fact is that before the engine warms up, the coolant circulates along a small circuit, bypassing the radiator.
The mechanical drive of the VAZ 2107 cooling fan can be improved:
- Install a diffuser that directs air flow through the radiator honeycombs. This will improve the cooling efficiency.
- Move the radiator a little back, closer to the impeller. To do this, you can tilt its upper part, using hard steel straps for fastening. The slats must be calculated so that the distance between the radiator and the impeller is approximately 2040 mm.
Thus, you can protect the car from overheating.
Electric radiator cooling fan (forced)
So that a breakdown of the VAZ 2107 fan sensor does not bring problems, you can organize forced cooling without replacing the standard electric fan with an impeller put on the pump pulley. To do this, it is enough to provide a backup switch on the fan with a button. You will need the following parts and materials:
You will also need new sensor fan if the old one is faulty. You can check the serviceability with an ohmmeter or continuity. If the fan does not turn on when the lower part of the radiator heats up, it must be changed.
First you need to reduce the current passing through the contacts of the thermal relay that controls the fan on. To do this, the VAZ 2107 fan switching circuit must be changed so that it is not powered directly from the sensor, but through an additional relay. In this case, the contacts of the fan sensor (thermal switch) will not burn, and in case of failure additional relay, the latter will be much easier to replace.
It is also necessary to connect the fan on button so that when turned on, it duplicates the sensor, applying voltage to the relay coil when turned on. In this case, if the sensor breaks down, it will be possible to manually turn on the VAZ cooling fan and protect the engine from overheating.
Improving the cooling system with an electric fan
To improve cooling, you can replace standard fan cooling VAZ 2107 to a more powerful and perfect. In this capacity, fans from viburnum or priors are suitable. The eight-bladed fan is particularly efficient, providing particularly strong airflow.
It is worth considering that the VAZ 2107 cooling system was originally designed for effective work. If it fails, the reason lies not in ineffective standard battery, but clogged radiator cells or lack of coolant in the system. Therefore, in case of engine overheating with the fan running, it is worth checking the coolant level and cleaning the radiator cells (or replacing it).
With the active use of laptops, especially in the hot season, users often experience strong heating. Systematic overheating leads not only to slowdown of the OS and periodic self-shutdown of the PC, but also to premature exit failure of the processor, motherboard or other structural elements. To reduce the temperature of the laptop, you can force the fan included in the laptop cooling system to turn on by programmatically changing some of its settings.
Ways to control the operation of the cooler on a laptop
In portable computers, the BIOS is responsible for the normal functioning of the cooling system. At the same time, the factory settings provide for the operation of the fan only at 50% of its maximum power . This is done so that during operation the cooler does not buzz a lot and does not consume a lot of electricity.
In almost all motherboards the possibility program control performance of the cooling system. There are several ways to force the fan on a laptop to turn on:
- Through BIOS.
- With the help of special software.
Changing the cooler settings can cause unpleasant noise during its operation, as well as accelerated battery discharge. Therefore, before starting radical measures, you should disassemble the laptop, and then clean the fan and motherboard from dust, because it reduces heat transfer and, accordingly, leads to an increase in PC temperature.
Force fan start via BIOS
To make the cooler on a laptop work more efficiently, you can change the speed of its rotation and set the temperature of the CPU, which it needs to maintain. To do this, you must perform the following steps:
The software shell of the Hardware Monitor tab may differ in different BIOS builds. However, if you know what parameters need to be changed, you can easily switch the fan to the required operating mode:
In intelligent mode, the cooler can work with the following parameters:
- Silent - the emphasis is on the silent operation of the system and saving battery power;
- Standard - the fan will operate at half its capacity;
- Performance and Turbo - produced maximum acceleration fan (in this case, the autonomy of the laptop will slightly decrease, since the cooler will consume a lot of energy).
Forced fan on with SpeedFan
Another way to increase the efficiency of the cooler is to use a special software, which includes the free utility SpeedFan. To overclock the fan using this application, you must:
There are other programs that allow you to force the laptop fan to start. So, using the AMD OverDrive utility, you can make changes to the operation of a PC cooler assembled on the basis of an AMD processor. The Riva Tunes application has been developed for Intel processors.
The delay in turning on the 2111 fan can be considered one of the many flaws in the design this car. But despite this decide this problem, however, like everyone else, it is not difficult, it is important to have “straight hands”, and be well versed in the device.
Now about the problem of the late radiator. The optimum working temperature should not exceed 90°C. But on the VAZ 2111, the inclusion additional cooling occurs at a temperature of 100-105°C. Thus, we can say with certainty that the fan starts at the moment when it has already overheated. As you know, the operation of the engine at critical temperatures negatively affects its service life.
The solution to the existing problem could be forced inclusion engine cooling radiator fan by installing a button in the mobile.
Before you start finalizing the VAZ, prepare the following components:
Power button
Instructions for finalizing the inclusion of a VAZ 2111 radiator fan
After forcibly turn on the cooling fan VAZ 2111 it is possible not only with the engine running, but also with the engine turned off at.
