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Shock absorbers are a kind consumable your vehicle. Moreover, the cost of maintaining the suspension in working condition is inversely proportional to the quality of the roads. Car owners are constantly looking for ways to save on the repair and maintenance of their car. We will talk about self repair and restoration of the characteristics of the shock absorber struts.
When front and rear shock absorber struts need to be checked
Typical malfunctions of this node are known to everyone:
- Depressurization of the stem seal. Causes oil to leak from the rack. May leak at any time. Characteristics change up to a complete loss of performance.
- Too free movement of the stem in the pipe. In fact, the shock absorber strut turns into a guide for the suspension spring. The fault is related to the internal valves.
- Backlash in compression or rebound. Associated with the development in the rod or cylinder. The consequences are similar to broken valves. The shock absorber does not fulfill its function in the car, it knocks, rattles and makes other unpleasant sounds why driving in such a car becomes uncomfortable and dangerous.
- External damage - dents on the case, cracks in the lug. They affect the chassis as a whole and can lead to more serious damage.
If any malfunction is detected, it is necessary to remove the rack and release it from the spring. Dismantling is carried out in the garage, without the use of special tools.
Sometimes the owners of foreign cars, noticing that their racks are leaking, turn to the service station for diagnostics, where they will check it at the stand.
Repair or replacement? What can be done with your own hands
In fact, this is not such an easy task. Before carrying out work, you should carefully study the material and observe safety precautions. First of all, you need to determine whether you have a collapsible shock absorber or not. The monolithic body is not repairable, opening with a grinder and brewing is unacceptable.
If there is a nut or a retaining ring at the place where the stem enters the pipe, such a shock absorber strut can be serviced and repaired.
This is what a repair stand looks like
Required Tools
Attention! You need to take care of security. Work related to high pressure therefore eye and hand protection is required.
Rack gas pressure recovery
The process can be seen on the video.
Video on how to pump gas in a gas-oil rack
There are different opinions: how to fill a car shock absorber. Nitrogen, carbon dioxide or just compressed air? In a garage, there are few options. Compressed air will not greatly degrade the performance, especially considering that this is a repair, and not the manufacture of a rack at the factory.
Shock Absorber Bleeding
Video: how to restore the operability of a non-separable mechanism and does it make sense
Replacing the rod, valves, adjusting the stiffness of shock absorbers
The next malfunction is damage to the stem, seals, valves inside the rack. There is a range of spare parts available on the market for repairing demountable shock absorbers. In addition, an experienced car enthusiast never throws away old spare parts, but tries to repair them. In addition, workable parts can always be extracted from them.
- So, we disassemble the shock absorber.
Don't forget to wear gloves, the job is dusty
- We extract and defect the rod with the piston, valves and O-rings. Parts that have become unusable must be replaced. Rubber bands can be selected from universal ones on the market. Metal parts are ordered from a turner (if you could not find the right size).
Turning work is usually cheaper than the cost of a new shock absorber
- We assemble the assembly, carefully monitoring the sequence of installation of parts.
Tip: The entire process of disassembling the shock absorber should be photographed. This will avoid assembly problems.
- It is important to ensure the cleanliness of the assembly, the ingress of dirt or solid metal particles will quickly disable the remanufactured shock absorber.
Get rid of drips, dirt and dust even in the process of parsing
- The valves must be especially carefully defected, since their proper operation sets the characteristics of the shock absorber. Softness can be adjusted by changing the number of spacer washers in the stem mechanism. For this, you need to familiarize yourself with technical documentation manufacturer. There are no universal solutions.
All parts must be meticulously checked.
- After that, install the rod in the cylinder. The oil seal is recommended to be replaced, but if it is in perfect condition, it is enough to clean it and put in new grease.
- After that, new oil is poured into the shock absorber, to the very top of the pipe. When installing the stem, the excess will flow out. Do not be afraid of overspending oil, the main thing is to prevent air from entering the pipe cavity.
After pumping the oil, the rack must be pumped, as usual
- After installing the stem, it should be gently moved to release the bubbles through the valves. Then the shock absorber is assembled and installed on the car.
Video: How to repair MacPherson strut struts
If you have basic information about how your shock absorbers work, you can save on replacing them. Most models of racks are repairable, and components are either purchased at reasonable prices or made independently.
To the landfill! Spare parts from it can be useful in everyday life.
1 of 17
Car hood headboard
Look closely - the headboard of this bed is actually an old car hood! Built-in shelves behind the hood offer convenient storage for books and small items.
2 of 17
Bench made of springs and parts of a pickup truck
The product of a collaborative effort between an interior designer and a mechanic, this is a one-of-a-kind bench made from an old tailgate, springs and leaf springs.
3 out of 17
Holder for papers and small things
The space between each coil spring can be easily used to store files, documents and small items on your desk.
4 out of 17
Antique car cans and canisters
Old jars, canisters and oilers from Europe, America or the USSR can decorate your shelves and give them a vintage charm.
5 out of 17
License plate like a birdhouse roof
Even our feathered friends appreciate good treatment and Beautiful design! Make them a birdhouse, an old license plate will come in handy for the roof. The cheerful one from the States is best suited. It is more colorful and wider than our counterparts.
6 out of 17
Use the ramp as table legs
Yes, you can turn old parts into amazingly chic furniture.
7 out of 17
Decorative car caps
A little imagination and diligence, and such beautiful plants can appear in your garden in the country. It is not necessary to water them. The stems are from a broken shovel handle, the flowers are from car hubcaps, the leaves are from a shovel's canvas.
8 out of 17
Steering wheel instead of cornice
Run the curtains through an old tractor wheel mounted on the wall and you have some pretty curtain rods. Screw tighter, the steering wheels from tractors are heavy.
9 out of 17
Motorcycle headlight as a lamp
Let the old headlights continue to glow, turn them into retro lamps with extraordinary retro charm.
10 out of 17
Tractor rim for ottoman
To give the tractor rim new life as a cozy piece of furniture, paint it and install an upholstered seat. The ottoman is ready.
11 out of 17
Tire instead of a flower bed
Have you ever thought that an old tire can look so beautiful? All you need is a can of spray paint, a chain and a hook to make this amazingly beautiful flower bed.
12 out of 17
Tires instead of a bench
Tired of the bench by the porch? Take car tires, color them in bright colours, add padded seats and beautiful pillows. Comfort created!
13 out of 17
Old shock absorbers - throw away or leave?
Everything breaks and fails someday, so shock absorbers need to be changed in a timely manner. But with old shock absorbers, you can experiment and do something.
And you can do the following with them: cut the spring a little and stretch it a little, and the old shock absorbers will continue to serve you, and you won’t have to buy new ones. But for this you need special equipment.
If there is no such equipment, then it is better not to risk it, but throw them away and just buy a shock absorber instead. What else can be done with old shock absorbers? Yes, in principle, you can do a lot of things! The main thing is that there would be a desire and time where to apply them.
I changed the shock absorbers on my motorcycle Izh Planet 5, and handed them over for metal)), I just didn’t find another use for them, they were heavily planted and could not be restored.
Springs from a car, of course, are more difficult to apply anywhere, as they are very tight and stiff. But, for example, springs from a bicycle can be found where to attach. In our country, there are enough craftsmen who can make something not only from shock absorbers, but also from any other piece of iron that comes to hand.
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When repairing or adjusting the suspension of a car, it becomes necessary to fix the spring in a certain position.
For these works, there is a service device: a spring puller, with which you can remove the chassis elements both in a specialized workshop and in garage conditions.
Various tool concepts:
Let's consider the second option in more detail.
How does a spring puller work, and what are they?
What is a puller for? It overcomes the straightening force of the springs. The applied force on the puller arms is commensurate with the weight of the car, but this does not mean that its design is too expensive and high-tech.
There are many options, but they are divided into only two types: mechanical and hydraulic drive.
Mechanical spring extractor
Most often it has a threaded drive mechanism. 
With a sufficient diameter of the stud (providing a good gear ratio on the thread), and a long wrench handle, it is possible to compress the springs manually without excessive force.
The technology is as follows: two pullers are symmetrically put on the rack. By turning the threaded stud, you bring the grips to the middle of the spring right on the shock absorber, compressing it to the required size.
Important: Why can't the mechanical puller be used alone? When compressed, the spring bends, it is impossible to control this process.
Installing one puller on the spring will break it
Pullers fitted on both sides ensure uniform compression. When working on the suspension of trucks or heavy SUVs, experienced craftsmen install 3 or even 4 pullers.
Correct installation of pullers on the spring
Semi-fixed racks
Service stations often use semi-permanent struts to remove springs from shock absorber struts. 
The tool is quite versatile, suitable for most pendants. Thanks to the gearbox of the drive mechanism, it is convenient and safe to work with it.
Popular: How to use a micrometer, and what are the types of the device?
The only drawback is that it is not always possible to compress the spring directly on the car. Still, this is a bench device: the puller works with the suspension removed from the car.
lever type
A similar "problem" with lever-type pullers. The mechanism is reliable and safe, but its dimensions do not allow crawling into the space under the wing of the car. 
Hydraulic puller
Can be portable and stationary. It works on the principle of a jack: there is a main and working cylinder. By pumping liquid with the help of a lever handle, the operator compresses the power brackets, between which there is a spring. 
A compact two-section puller can become an assistant in a home garage, but a floor-mounted stationary machine is only suitable for a car service. 
The hydraulic system is pressurized with a foot lever. At the same time, the hands of the car mechanic are free, it is convenient and safe to work.
Of course, there are pullers with compressors, electric drive, and other devices that make life easier when servicing a car. All this is good until you see the price tag.
Sometimes it is more profitable to visit a car service several times than to purchase an industrial puller for personal use. Which exit? Make a tool with your own hands.
Making a shock absorber spring puller
Many car enthusiasts use a regular chain: wind a few turns around the coils of the spring, and tighten the chain. When the vehicle is jacked up, the suspension strut expands while the spring remains compressed. This dangerous way CAUTION: If the chain slips, the unfolded spring could cause serious injury.
How to make a simple puller by analogy with an industrial one
A mechanical semi-stationary "machine" can be created from a "Volgovsky" jack.
Materials used:
Drill, grinder, file, welding machine- such a set is either in the garage, or available from a neighbor for a couple of beers. To the top of the jack (where the turntable with the gearbox is located) a platform is assembled from the corner. Then a bracket is welded to it according to the size of the support cup. 
We fasten the connecting rod to the standard support lever of the jack, the shock absorber strut will go into it. 
No need to worry about the strength of the structure. The jack raises the car, the connecting rod also withstands a huge load. And to enhance cantilever design bracket, weld the rods from the shock absorber rods. 
The puller is universal: the length of the shock absorber allows you to service any racks for cars, as well as most SUVs. 
The next spring puller, which is easy to do with your own hands, is a tightening type. Suitable for small sizes of springs, since it is unrealistic to develop a large force on such a device. 
Components are even more affordable than in the previous design. A piece of pipe, a corner and a long bolt M14 - M18. You can use a pin.
We weld the brackets from the corner and sawn pieces of an inch pipe. The puller consists of two identical ties, so there should be four brackets. 
Be sure to weld the guide bushings for the stud. Otherwise, when tightening, the brackets will wedge. 
The spring is compressed by synchronously tightening the nuts on the studs. If you use a set of 2 ties, they should be installed strictly symmetrically.
