Bleeding the power steering yourself

The cars are equipped with a hydraulic power steering system, with the help of which the driver can rotate the steering wheel without much effort. Only electric and hybrid vehicles do not have this system.

The pinion and rack connect to the front wheels; A gear runs along a toothed bar, moved by fluid pressure, making the wheels turn more easily. In addition, the system consists of a plastic or metal expansion tank located inside the pump, which can also be installed separately.

If the expansion tank is not filled with fluid, the steering wheel will be difficult to turn, the pump may be damaged or the rack mechanism may break because they are not sufficiently lubricated. It is for this reason that it is recommended to constantly check the level and add it if its quantity is insufficient.

Why do you need power steering?

Power steering is a system that is part of the steering system and is aimed at reducing the effort exerted by the driver on the steering wheel when changing direction.

At the same time, this system ensures that the driving conditions of the steered wheels are transmitted to the steering wheel, the so-called “road feeling”; this system also takes on shock loads from the wheels and absorbs them without transferring them to the steering wheel.

Is there life without power steering?

Hydraulic power steering is responsible not only for comfort, but also increases driving safety. With power steering, the steering wheel turns much easier, and a slight hand movement is enough to turn, which significantly improves the driver’s maneuverability and responsiveness. In addition to convenience, the hydraulic booster smoothes out vibrations and shocks from road unevenness, and also provides additional insurance in the event of force majeure in the event of an unexpected tire puncture, allowing you to hold the steering wheel and level the trajectory.

In addition to all the advantages, power steering has another undeniable advantage - it is simple and unpretentious to maintain. It is enough to periodically check the serviceability of the elements and update the special hydraulic fluid.

Operating principle of hydraulic power steering

The hydraulic booster serves to assist the driver when turning the steering wheel. Consists of the following main elements:

pump;
expansion tank;
highways;
spool valve;
two cylindrical cavities inside the rail.

To better understand why changing the oil in the power steering is a mandatory procedure, let’s briefly consider its operating principle.

Power steering operating principle

The pump takes liquid from the tank and pumps pressure into the line. When the steering wheel is turned, depending on which direction the force is applied, the spool valve directs a flow of liquid under pressure into one of the cylinders.

Due to the pressure on the piston inside the rack, additional force is created, which helps the rod move in the desired direction and reduces the necessary force that must be applied to the steering wheel.

Oil here plays not only a lubricating and protective function, but is also a carrier of energy. Therefore, the efficiency and durability of the entire system depends on its condition.

Low-quality or expired liquid

The hydraulic booster is filled with oil, which is similar in characteristics to ATF for automatic transmissions. Just like in an automatic transmission, during operation the fluid “ages” and can no longer effectively lubricate the pump, seals and other parts. This is one of the reasons why the power steering howls .

If you hear unusual sounds in the steering column area, check the condition of the fluid. Take a little oil from the power steering expansion tank into a regular syringe and drop it onto a piece of paper. The color of the drop should be red, green or blue (depending on the brand). If the fluid has turned dark brown, gray or black, it needs to be replaced urgently.

A burning smell is also a signal for immediate replacement. The schedule for changing the power steering oil depends on the car model. The timing is indicated by the manufacturer in the technical documentation for the machine. As a rule, the interval is about 100 thousand kilometers, but at least once every two years. If you have been driving for some time with a power steering howling due to poor oil quality, after replacing the fluid, add the tribotechnical composition “Power Steering” from Suprotec to it. Approximately 30 milliliters of product should be added per liter of oil. Strictly follow the instructions for use.

Power steering device

Power steering is a closed, interconnected hydraulic system of components consisting of:

Pump.
Distribution device.
Hydraulic cylinder.
Backa.
High and low pressure hoses.

Pump

The main part of the power steering design is the pump. With its help, pressure is created in the power steering and oil circulates in the system. It is fixed near the engine and driven by the crankshaft using a belt or gear drive (drive). The most common type of pump is a vane pump, usually a vane pump; it provides high wear resistance and high efficiency. However, it has a weak link, namely the bearing, which is why it has to be repaired. The pressure in this type of pump is about 150 bar, which is very high.

Distributor

The distributor in the power steering is a kind of regulator that directs oil from the reservoir to the hydraulic cylinder and back. It can be installed both on the steering gear shaft and on some parts of the steering mechanism. There are two types of distributor:

axial - if the spool makes translational movements;
rotary - if it makes rotational movements.

Hydraulic cylinder

Or as the power cylinder is also called, it performs the function of turning the wheels. The fluid in the power steering presses against the piston under pressure and forces the rod to extend, causing the wheels to turn. In order to push the rod back, the fluid from the reverse side presses on the piston and the wheels return to their original position. The hydraulic cylinder can be located both on the steering mechanism and between the steering gear and the vehicle body.

Tank

A reservoir for working fluid, which ensures the operation and lubrication of all connecting parts of the power steering. It contains a special filter to prevent dirt from entering, since the distributor is very sensitive to this. To check the oil level there is a special dipstick and marks on it. The tank is located under the hood, usually in a visible place next to the antifreeze tank and has a cylindrical shape.

High and low pressure hoses

Of course, all fluid circulation through the power steering system is provided by hoses, which are divided into:

high pressure hose;
low pressure hose.

High pressure power steering hoses circulate oil between the pump, rotary or axial distributor and hydraulic cylinder. And low pressure returns this oil from the distributor to the tank, as well as from the tank to the pump. It is important to monitor the condition of the hoses to avoid fluid leaks and damage to the entire mechanism.

Tips for using power steering

In order for the hydraulic booster to work normally and not knock, you must follow a few simple rules:

Monitor the oil level in the power steering system , top up and change it on time. In addition, check its condition. There is always a risk of purchasing a low-quality liquid, which becomes unusable after a short period of use (check its color and smell).
Do not hold the wheels in the extreme position (more than 5 seconds) . This is harmful for the power steering pump, which operates without cooling.
When parking the vehicle, always leave the front wheels level (straight) . This will take the load off the power steering system the next time you start the engine. This advice is especially relevant in cold weather, when the oil thickens.
If problems occur with the power steering (humming, knocking, increased effort when turning the steering wheel), do not delay repairs . You will not only fix the breakdown at a lower cost, but also protect your car, you and your loved ones from possible emergency situations.
Constantly monitor the condition of the steering rack . This is especially true for the condition of anthers and seals. This way you will not only extend its service life, but also save money on expensive repairs.

Where is the power steering reservoir located?

The power steering pump reservoir (also called the power steering reservoir) is an important part of the power steering system, which is a steering system that assists steering by applying hydraulic pressure to the steering mechanism. Most cars today have hydraulic power steering.

The power steering pump reservoir contains the hydraulic fluid that the power steering pump moves to help you steer. Without this fluid, the system will not function. Often the reservoir is directly connected to the power steering pump, which is located on the front of the engine near other engine accessories; however, the exact location of the pump will vary from one engine to another. Sometimes the power steering pump reservoir is installed remotely. In either case, there will be a pair of fluid lines to move fluid into and out of the pump. An example of the location of the tank is shown in the photo below:

Low level

It is easy to diagnose this malfunction - just check the power steering expansion tank, which is located in the engine compartment. The oil level should be between the MIN and MAX marks. If there is less fluid, add, but first eliminate the cause of the leak. Carefully check the clamps and joints - in 90% of cases, leaks occur in these places. As soon as you hear the power steering howling , add the Suprotec power steering tribotechnical compound to the fluid. The product will help to minimize the damage caused to the vehicle component as a result of abnormal operation. If the damage is minor, the functionality of the hydraulic booster will be fully restored.

Tribotechnical composition Suprotek "GUR" for power steering

To restore performance and extend the life of the power steering

What types of power steering fluids are there?

Based on the foregoing, it can be understood that all elements of the system only provide fluid pressure, give the desired direction to the parts and convert pressure into force. The main working element in the power steering system is liquid.

Power steering fluid, no matter who makes it, is based on petroleum components. Essentially this is the same oil, only with certain properties.

If motor oils have the main task of lubricating rubbing parts, then power steering oil has the task of transmitting force.

And since it must be quickly transmitted through the channels, the power steering fluid should not be very viscous, but at the same time this oil should also lubricate the system elements, but to a slightly lesser extent than engine oil.

Power steering fluids are available in two types:

Mineral;
Synthetic.

Mineral is used in most power steering, synthetic is less common.

A feature of these liquids is not interchangeability, as is the case with motor oils. In this case, switching from mineral fluid to synthetic fluid will lead to power steering failure.

And all because synthetic fluids contain additives that negatively affect the service life of rubber-based rubber elements, but there are enough such elements in power steering.

Ford synthetic power steering fluid “DP-PS”, 1 l.

Usually in those The vehicle documentation indicates that synthetic power steering fluid is used, and only that should be used.

If there is no information on the fluid in the documentation, then the car uses mineral by default.

Power steering oil requirements

Heat resistance.

Since the oil is intended not only for lubricating mechanisms, it acts as a heat sink from heated parts and parts of the hydraulic booster. The liquid must be resistant to high temperatures up to 110⁰C, and also not lose its properties at low pressure and at temperatures down to minus 35⁰C.

Stable viscosity.

Power steering oil contains additives that control the level of fluid viscosity under conditions of changing ambient temperatures. Thanks to this, at low temperatures the oil retains its properties and does not thicken, which allows you to rotate the steering wheel without extra effort.

Transparency and homogeneity.

A distinctive property of good and high-quality oil is its transparent appearance and uniform consistency. Even after the machine has been idle for a long time, additives should not precipitate and clog the oil.

Wear resistance.

Oil still has an aggressive effect on the rubber parts and mechanisms of the machine. It is worth choosing a type of fluid that has special additives with the function of a protective film, thereby reducing the wear life of rubber parts.

Slight foaming.

An undesirable phenomenon in the power steering oil tank is foaming. The appearance of bubbles can have a bad effect on the steering wheel turning mechanism, namely, the process of transferring force from the steering wheel to the turning mechanism will be difficult. So you should pay attention to this important criterion when choosing oil.

Color characteristics of liquids

Also, power steering fluids are divided among themselves by color. Interestingly, initially they were all red - Dexron.

According to their class, power steering fluids are classified as automatic transmission fluids (ASF), but power steering fluids have a different designation PSF

At the same time, PSF is the same as ASF, but only the latter’s additives are slightly different, and are designed to work with gearbox clutches, which power steering does not have.

But these additives do not in any way affect the operation of the power steering, so Japanese cars often come from the factory with ASF poured into the power steering reservoir.

Why bleed your power steering system?

Perhaps the steering wheel has become noisy, or the steering wheel has become difficult to turn. These are potential signs of air getting into the power steering system.

Signs of trapped air in the steering system:

You hear a whistling sound from the steering pump.
Bubbles appear in the formation fluid.
The reservoir fluid is low and foamy.
The steering wheel is difficult to turn.
The steering system is leaking.
You hear a wheezing or growling sound at low speeds when turning.
The steering wheel groans when it turns left or right.
You hear a whirring noise when you turn the steering wheel.
The steering system makes noise when operating.

Air can enter the system in different ways:

due to damaged hose, fitting, seal or component
after you have replaced some system component
after you have disconnected and reconnected the hose

The following sections will help you check for trapped air and, if necessary, bleed the power steering system. You will find more than one method that you can apply, depending on your specific model.

Only add power steering fluid recommended by your vehicle manufacturer for your specific application.

Checking the steering system for trapped air

You may not be sure if there is air in your steering system. Here are a couple of simple tests you can do at home to check your system for air.

Why is pumping needed?

As noted above, the power steering system is airtight . It must be free from moisture, air, dust or dirt, because only in this case can it fully perform its functions - apply the required pressure to the piston, lubricate the system’s spare parts and remove heat. Not only external factors have a detrimental effect on the operation of the hydraulic booster system.

The first hydraulic power steering was manufactured in 1925. Its creators were Francis Davis and George Jessop. The scientists installed the power steering on a Pierce-Arrow Roadster, owned by Davis.

Careless operation of the machine can cause a number of problems, resulting in:

parts of parts wear out, which causes particles of steel chips to enter the liquid;
rubber elements collapse and become unusable, as a result of which the seal is broken;
the composition of the oil mixture changes under the influence of high temperatures;
Hoses and pipes are destroyed.

All the factors described above lead to the fact that after a certain time the power steering system depressurizes.

This situation is very dangerous for vehicles, because:

is capable of completely changing the operating technical properties of the drive;
leads to the steering wheel being blocked in the right or left position, due to which it is not possible to control the vehicle;
provokes uneven rotation of the steering wheel, which significantly complicates the precise execution of the maneuver.

Important! Pumping the power steering is a very serious and responsible undertaking, which guarantees the stable functioning of the steering. It is for this reason that it is extremely important to entrust the procedure to professional craftsmen.

To rid the system of air, they practice bleeding it, which allows you to restore the full functioning of the steering. At the same time, it is important not only to properly pump the power steering, but to maintain its performance for a long time.

To do this, experts advise:

use only high-quality oils recommended by the manufacturer;
remove air from the system, strictly following the instructions;
replace the working mixture in full;
monitor the condition of the steering rack boot and systematically clean the parts from dust.

Power steering hums when cold

Troubleshooting power steering and steering rack

There are several reasons why the power steering hums when cold. The first is that air is leaking through the low pressure lines . To eliminate it, it is enough to put two clamps on the tube going from the reservoir to the power steering pump. In addition, it is worth replacing the ring located on the suction pipe of the pump itself. After installing the clamps, we recommend that you use an oil-resistant sealant to coat the clamps and joints.

You can also conditionally identify another reason, the probability of which is low. Sometimes there are cases when insufficient (poor quality) pumping of the power steering system . In this case, an air bubble remains at the bottom of the tank, which is removed using a syringe. Naturally. that its presence can cause the indicated hum.

Elimination methods may include replacing oil hoses and/or racks, replacing the power steering pump, installing additional clamps on all hoses in order to prevent air leaks into the system. You can also perform the following procedures:

replacing the O-ring on the expansion tank supply spout;
installing a new hose from the reservoir to the pump using oil-resistant sealant;
perform the procedure for expelling air from the system (when performing the procedure, bubbles will appear on the surface of the liquid, which must be given time to burst) by turning the steering wheel with the engine not running;

Another repair option is to replace the O-ring in the power steering pressure suction hose (and, if necessary, the hose itself and both clamps). The fact is that over time it loses elasticity and becomes rigid, that is, it loses elasticity and tightness, and begins to let air through, which enters the system, causing knocking and foam in the tank. The way out is to replace this ring. Sometimes a problem can arise because it can be difficult to find a similar ring in a store. But if you find it, be sure to replace it and place it on the mount and lubricate it with oil-resistant sealant.

For some cars, a special power steering repair kit is available for sale. If problems arise with this unit, the first thing you need to do is buy a repair kit and change the rubber gaskets that are included in it. Moreover, it is advisable to buy original kits (especially important for expensive foreign cars).

Power steering pump bearing

It is also necessary to ensure that there is no dirt in the system fluid . If it is present even in small quantities, over time this will lead to wear on the parts of the power steering pump, which will cause it to begin to make unpleasant sounds and work worse, which will be expressed in increased effort when turning the steering wheel, as well as possible knocking. Therefore, when replacing the fluid, be sure to check for dirt deposits at the bottom of the expansion tank. If they exist, you need to get rid of them. Check the filter in the tank (if there is one). It should be relatively clean and intact, tightly adjacent to the walls of the tank. In some cases, it is better to replace the entire tank and filter rather than try to clean them. Also in this case, it is necessary to remove the rail, disassemble it, wash it from dirt, and also replace the rubber-plastic parts. To do this you need to use the mentioned repair kit.

An unpleasant sound may come from the outer bearing of the power steering pump . Its replacement is easy, without the need to completely disassemble the unit. However, sometimes it can be difficult to find a replacement for him.

There are special additives that are added to power steering fluid. They eliminate the hum of the pump, relieve effort on the steering wheel, increase the clarity of the power steering, reduce the level of vibration of the hydraulic pump, and protect system parts from wear when the oil level is low. However, motorists have different attitudes towards such additives. They really help some, but they only harm others and speed up the time for replacing the power steering pump or replacing it.

When choosing a liquid, pay attention to its temperature characteristics so that it works normally in severe frosts (if necessary). Since oil with high viscosity will create obstacles to the normal operation of the power steering system.

Signs of malfunctions in the power steering system

There are several signs that the power steering system is airy, in which case it is necessary to bleed it. Among them:

the appearance of strong noise in the area where the power steering or its pump is installed;
increased pressure on the steering wheel , difficulty turning it;
leakage of working fluid from the power steering system.

In addition, there are several other signs that indicate the system is becoming airy - the appearance of foam on the surface of the working fluid in the expansion tank, spontaneous turns of the steering wheel to one side. If you encounter at least one of the described symptoms, it means you need to bleed your power steering.

Power steering hums when hot

If the power steering hums when hot, then there may be several problems. Let's look at several typical situations and methods for solving them.

If the steering wheel begins to vibrate while the engine is warming up, it is necessary to replace the pump or repair it using a repair kit.
When a knocking sound appears on a warm engine at low speeds, and disappears at high speeds, this means that the power steering pump has become unusable. In this case, there may be two ways out - replacing the pump and pouring thicker fluid into the power steering system.
If you pour counterfeit liquid into the system, this may cause it to lose its viscosity , and accordingly, the pump will not be able to create the necessary pressure in the system. The solution is to replace the oil with the original one, after flushing the system (pumping with fresh fluid).
Steering rack malfunction . When heated, the fluid becomes less viscous and can leak through the seals if they are damaged.

How to pump power steering

How to fill oil and bleed power steering

The procedure for replacing fluid and pumping power steering is carried out in strict accordance with the existing algorithm. Some automakers may add their own features to it. If you have a manual for your car, we recommend that you read the relevant section. In general terms, the steps must be performed in the following sequence:

Raise the vehicle completely on a lift or with the front wheels off the ground.
If necessary, drain the old fluid from the expansion tank. To do this, remove the return hose (going to the power steering system) from the expansion tank and put a plug on it so that liquid does not spill out of the hose. A hose leading to an empty bottle is connected to the released tap on the tank, where the old hydraulic fluid is supposed to be drained.
It is most convenient to pump out the main volume of liquid with a syringe and pour it into a separate bottle. When there is very little liquid left, move on to the next point.
Fill the expansion tank with working fluid to the top.
Next, you should turn the steering wheel from side to side (from lock to lock) several times so that the old fluid remaining in the system flows out through the hose. Since the new fluid displaces the old, do not forget to monitor the oil level in the tank so that air does not get into the hose.
If the fluid level drops, add it again.
Start the engine for 2-3 seconds and turn it off. This is done so that the liquid begins to spread throughout the system.

It is important to remember that if you have aired the power steering system, the air can be expelled by bleeding it by rotating the steering wheel from side to side. However, do not start the engine under any circumstances, since the air in the system is critical for the power steering pump and can cause its failure.

Pumping out oil with a syringe

Next, add working fluid to the tank to the MAX level and repeat the procedure by starting the engine. Repeat this cycle 3-5 times.
The signal to stop pumping is the fact that air from the return hose stops entering the drain bottle. This means that there is no more air left in the hydraulic system and fresh, clean fluid enters the reservoir.
After this, you need to reinstall the return hose (connect it to the expansion tank where it was originally installed).
Refill the reservoir to the MAX level, then start the engine.
To pump the hydraulic booster, you need to slowly turn the steering wheel 4-5 times from the left to the right stop. At the stop points, pause for 2-3 seconds. If there is any air left, it should escape into the expansion tank. During the inspection process, we make sure that the pump does not make any extraneous noise.
An indicator that pumping has ended will be the absence of air bubbles on the surface of the liquid in the tank.
After this, close the expansion tank tightly.

Bleeding the power steering system

can also be pumped without starting the engine , “cold”. To do this, just rotate the steering wheel from the left to the right stop . At the same time, old fluid and air leave the system. However, most automakers still recommend bleeding the system with the engine running.

The fluid level in the reservoir should be between the MIN and MAX marks . Remember that when heated, the liquid expands, so you should not pour it beyond the existing mark.

Causes of hum

An unpleasant power steering hum can occur under various circumstances. Let's look at the most basic reasons why the power steering hums when turning:

Low fluid level in the power steering system. You can check this visually by opening the hood and looking at the oil level in the power steering expansion tank. It should be between the MIN and MAX marks. If the level is below the minimum mark, then it is worth adding fluid. However, before doing this, you must definitely find the cause of the leak. Especially if a little time has passed since the last top-up. As a rule, leaks occur at clamps and at joints. Especially if the hoses are already old. Before topping up, be sure to eliminate the cause of the leak .
The filled liquid does not match the one recommended by the manufacturer. This can cause not only a hum, but also more serious malfunctions. The power steering also due to the fact that, although the fluid meets the specification, it is not intended for operation in special temperature conditions (in significant frosts).

Reasons for air entry

In most cases, air enters the hydraulic system at the moment when car maintenance activities are carried out. For example, when replacing fluid in a hydraulic system. To avoid airiness, experts advise pouring the mixture at a rate of approximately 5.5–6 l/min.

If foam or bubbles form in the distribution tank during replacement, then you need to let the liquid sit for at least 20–30 minutes so that the air is completely released. Another common cause of air ingress is wear and tear of high-pressure pipes. To remove air from the power steering in such a situation, it is necessary to completely replace the unsuitable elements.

Typical power steering malfunctions

Malfunctions in the operation of the hydraulic booster can be easily identified by characteristic signs. Among them:

The steering wheel turns hard . Probable causes are failure of the power steering pump, use of unsuitable working fluid, sticking of the spool mechanism channels.
, a high-frequency sound (similar to a whistle) is heard while driving The probable cause is a loose drive belt.
The steering wheel turns jerkily . Probable causes of the malfunction are the working fluid not meeting the specifications declared by the manufacturer, a malfunction of the fluid distributing mechanism, or a pump malfunction.
The presence of intense foaming in the expansion tank. Probable causes are mixing of different types of fluids, failure of the power steering pump.
When the engine is running, the steering wheel spontaneously turns in any direction . The probable cause is malfunction of the spool mechanism, most often, clogging of its working channels, incorrect assembly (for example, after installing a repair kit).

Is it worth pumping yourself?

The question is purely individual. It depends on your skills, capabilities and desire to save. The cost of the working fluid itself for power steering depends on many parameters, and therefore prices vary from 4 to 15 dollars per 1 liter. In total, pumping and replacement will require from 1 to 3 liters.

When you contact a car service center, they will charge you at least 1,000 rubles for pumping work. The replacement procedure costs about 2000 rubles. Now decide for yourself whether it’s worth spending money on this, or take everything into your own hands and solve the issue yourself.

Bleeding the power steering cannot be called difficult. Many inexperienced car owners easily perform this work. It is only important to follow the manufacturer's recommendations and use high-quality fluid suitable for your specific power steering.

Liquid leakage, where to look and how to fix it

Let's move directly to the technical part. So, the force on the steering wheel when driving has increased significantly. The most common cause of this phenomenon is the loss of fluid from the system.

There are not so many reasons for this phenomenon: damage or leakage of the system tank, possible weakening of the fastening of pipelines at the entrances to the components of the system, breakdown of the pipelines themselves.

These faults are easy to detect; just carefully inspect all pipelines and fastening elements for leaks.

If a leak is detected, it can be eliminated by tightening or replacing the damaged pipeline.

But that’s not the only place where a leak can form. It is much worse if the leak occurs due to worn rubber products included in the design of the pump or distributor.

It is more difficult to eliminate these leaks due to the need to remove the power steering units from the car and carry out repair work with the replacement of damaged elements.

Replacing power steering fluid

The fluid replacement process here is relatively simple and is similar in principle to many cars. You just need to make sure that air gets into the system, it disrupts its normal operation and can even damage the hydraulic pump.

Partial

During a partial replacement, only liquid is removed from the tank, after which it is filled with fresh fluid.

During operation, the remaining oil is mixed with the newly poured:

the tank is opened, and the liquid present there is pumped out from there using a suitable syringe, onto which a flexible plastic or rubber tube is attached;
the tank is filled with a new product to the maximum mark on its transparent wall or on the dipstick;
the engine starts and the steering wheel is turned several times in both directions until it stops; it is better to carry out this operation with the front wheels hanging out;
if necessary, the level is brought to normal;
the operations can be repeated, the more liquid that takes part in the exchange, the purer the product remaining in the system will be.

With this method, it is very desirable to know what exactly was poured into the power steering and to prevent mixing fluids that have not been tested for compatibility.

Incorrect choice

If you mistakenly or in a hopeless situation filled in a liquid that is not on the list of brands recommended by the manufacturer, there is only one way out - urgently replace it. Operating the car in this case will lead to the fact that the power steering will not only howl , but will generally fail.

To neutralize the consequences of operating the hydraulic booster with unsuitable oil, after replacing the fluid, fill the system with the Suprotec “GUR” tribotechnical compound. This development of domestic engineers protects rubbing and friction parts from wear. The product restores minor damage and forms a layer that retains more lubricant on the surfaces of mechanical components.