The braking system is the basis for the safety of any vehicle, and Skoda Rapid this is no exception. Rear brakes often operate less aggressively than front brakes, but this is precisely why owners tend to put off servicing them until a critical moment. Wear of the guides, loss of elasticity of the sealing rings and piston corrosion lead to jamming of the mechanism, which causes overheating of the discs and uneven wear of the pads.
Replacement rear caliper repair kit - This is a procedure that you can perform yourself if you have the necessary tools and high-quality spare parts at hand. Ignoring symptoms such as squealing when braking or your car pulling to one side can lead to costly repairs to your entire brake system. In this article, we will look at how to choose the right spare parts, what steps are involved in disassembling the mechanism, and what you should pay special attention to during assembly.
Signs that a repair kit needs to be replaced
Understand that caliper requires intervention, based on a number of indirect and direct signs. The most obvious signal is a constant burning smell from under the rear wheels after a trip, even without heavy braking. This indicates that the pads do not move away from the disc, and the mechanism is in a jammed state due to a jammed piston or guides.
The second sure sign is uneven wear of the brake pads. If you remove the wheel and see that the inner pad is worn out much more than the outer pad, the problem lies precisely in the mobility of the caliper. It is also worth paying attention to the visual condition of the anthers: cracks or absence of protective caps mean that moisture and dirt have already entered the mechanism, which accelerates corrosion.
Sometimes the problem only occurs during long-term operation. You may notice that after the car stops, the rear wheel is very heated, and in some cases, the characteristic grinding of metal against metal is heard. It means that O-rings have lost their properties and cannot ensure the return of the piston to its original position after pressing the brake pedal.
- π₯ Constant overheating of one of the rear wheels after the trip.
- π Uneven wear of brake pads (internal worn is stronger).
- π The car pulls to the side during emergency braking.
- π Screaming or grinding coming from the back axle when moving.
β οΈ Note: If you notice that the rear brake disc has a bluish hue from overheating, simply replacing the remix may not be enough. In this case, it is necessary to check the geometry of the disk and possibly replace it, since thermal deformations are often irreversible.
Choosing a quality repair kit for Rapid
The auto parts market offers a huge range of kits, but not all of them are suitable for the market. Skoda Rapid with its specific rear axle. Cheap analogues are often made of low-quality rubber, which quickly smacks in the cold or gets soaked from brake fluid. Savings on this site can turn into a re-repair after a couple of thousand kilometers of run.
The best solution is to choose original components or products of proven brands, such as: TRW, Brembo, Febi or SWAG. In the original remakes of VAG All manufacturer tolerances are taken into account, and the rubber withstands high temperature loads and the aggressive environment of the DOT 4 brake fluid.
When buying, be sure to check the equipment. In a high-quality set should be not only rubber seals, but also guide pins, if they are sold in the kit, as well as lubricant for guides. Pay attention to the date of manufacture of rubber products - old rubber, even in packaging, can lose its properties.
- β Original VAG parts β maximum reliability and compliance with standards.
- π TRW and Brembo brands are excellent value for money, often used on the conveyor line.
- βοΈ The kit should include lubricant for guides and anthers of the piston.
- π Check the expiration date of rubber products on the packaging.
- Original VAG
- TRW/Brembo
- Febi/SWAG
- Budget analogues
Necessary tools and preparation
Before you start, make sure you have a complete set of tools. To take off the caliper. Skoda Rapid You will need a standard set of keys, including hexagons and 13, 15 and 17mm heads. Pay special attention to the key for the rotation of the piston, as the rear caliper on this model has a hand brake mechanism that requires scrolling.
Do not forget about the jack and reliable stands under the body. Working with the brake system requires the stability of the car. You will also need a clean rag, a can of brake cleaner and a container for draining old brake fluid if you plan to replace it.
To work with the piston, you need a special tool - a rattle key for calipers or a simple remover with a set of adapters. Trying to push the piston without scrolling is strictly forbidden, since you will break the hand brake mechanism inside the caliper body.
βοΈ Preparation for repair
If you donβt have a special key to scrolle the piston, you can use a handbrake adapter, which is often sold bundled with a remix or as a standalone tool. A flat screwdriver and vise will also work, but this requires more care and can damage the piston thread.
Step-by-step replacement instructions
Start by removing the wheel and removing the brake caliper. Unscrew the guide bolts holding the caliper bracket, and carefully remove it without damaging the brake hose. If the hose is too short, the caliper can be hung on the wire to prevent it from sagging.
Next, remove the old brake pads and carefully examine the guide pins. If they jam or have traces of corrosion, they must be replaced or cleaned thoroughly. Remove the anther from the piston and unscrew the old sealing cuff. The piston must be gently squeezed out with compressed air or a special remover.
Now start installing a new remake. Insert new sealing rings into the grooves of the caliper body, pre-lubricating them with silicone lubrication. Set a new anther on the piston and gently squeeze the piston into the body, while rotating it clockwise to stop.
How do you insert a piston?
The rear caliper piston has a threaded cut for the hand brake mechanism. When pressed, it must be slowly rotated clockwise, combining the thread with the body. Do not use excessive force so as not to break the thread.
Collect the caliper in reverse order, install new guide pins and rubber anthers on them. Be sure to use a special lubricant for guides, avoiding hitting it on brake discs and pads. Set the pads and twist the guide bolts with the desired tightening moment.
- π οΈ Use only a special silicone lubricant for calipers.
- π Rotate the piston when pressed in to catch the handbrake mechanism.
- π§Ή Carefully clean all seats of old dirt and rust.
- π§ Observe the moment of tightening of bolts according to the manufacturer's specification.
β οΈ Warning: Before assembly, be sure to check the condition of the brake disc. If it has deep furrows or is worn below the minimum thickness, installing a new remap will not solve the safety problem.
Proper assembly of the caliper in compliance with the order of installation of seals and the use of specialized lubricant is the guarantee that the mechanism will not jam after a month of operation.
Features of servicing the Skoda Rapid rear caliper
Rear caliper on Skoda Rapid It has its own design features associated with the integration of the hand brake mechanism. Unlike the front calipers, here the piston not only moves linearly, but also rotates, which creates an additional load on the sealing elements. That is why the replacement of the remake should be carried out with the utmost care.
Pay special attention to the lubrication of guide pins. If you use conventional lithium lubrication or WD-40, the rubber of the anthers will quickly collapse and the pins will jam. Use only silicone or synthetic lubricants specifically designed for brake systems.
It is also important to remember the procedure for pumping the brake system after replacement. Air entering the system can lead to a failure of the pedal and loss of braking efficiency. Pump the system in the correct sequence: from the far wheel to the near.
| element | Recommended Lubricant | Check frequency |
|---|---|---|
| Guide pins | Silicone lubricant (e.g., PTFE) | Every time you replace the pads |
| Piston and seals | Special grease for calipers | Replacement of the remake |
| Brake pads | Copper lubrication (only on metal parts) | When installing new pads |
β οΈ Warning: Never apply lubrication to the working surfaces of brake pads or discs. The oil hitting the friction material will lead to a complete loss of the braking effect.
Before starting work on replacing the remplekt be sure to disconnect the battery's negative terminal to avoid accidental operation of the electronic hand brake, if it is installed in your configuration.
Typical repair mistakes
One of the most common mistakes is to ignore the condition of the guide pins. Many craftsmen only change rubber rings, leaving old pins that may already be worn or have micro-scratches. This leads to a rapid re-jamming of the caliper.
Another mistake is the wrong installation of the piston. If you do not rotate it when pressed, the thread of the hand brake mechanism may be damaged, which will require replacing the entire caliper assembly. Also often forget to replace the anther guides, which leads to the entry of dust and moisture inside the mechanism.
Incorrect tightening of bolts can also lead to problems. Too weak puff will cause backlash and vibration, and too strong will break the thread or deform the caliper body. Use a dynamometer key to control the moment of tightening.
What to do if the piston does not press in?
If the piston fails, check if you are rotating it correctly. Sometimes it helps to pre-unwind the pumping fitting to facilitate the course, but this should be done with caution so as not to damage the seals.
Owners sometimes try to save money by using remixes of unknown manufacturers. This can cause the rubber parts to not withstand the temperature or chemical composition of the brake fluid, which will end in a rupture of the seal and leakage of liquid.
- β Do not use generic lubricants instead of specialized ones.
- β Do not leave old guide pins when replacing the remplek.
- β Do not ignore checking the brake disc for wear and beat.
- β Do not use force when pressing the piston without rotation.
The quality of repair depends not only on new parts, but also on the condition of all the mated elements, including guides, anthers and brake disc.
FAQ: Frequently asked questions from owners
How long does it take to replace the rear caliper remake?
On average, the replacement of the remake of one rear caliper takes from 40 minutes to 1 hour for an experienced master. If you are doing this for the first time, set aside 1.5-2 hours to work with each wheel, including preparation and inspection.
Can I replace the car without removing the caliper from the car?
Theoretically possible, but extremely uncomfortable and risky. For high-quality cleaning and installation of new seals, it is better to remove the caliper. This will provide access to all elements and will allow you to check the condition of the case.
Do I need to change the brake fluid after replacing the repair kit?
It is desirable, especially if you have unscrewed the pumping fittings. Brake fluid is hygroscopic and absorbs moisture over time, which reduces its boiling point. If the replacement was carried out without opening the hydraulics, a complete replacement is not required.
What if the caliper still clinks after replacement?
Check the correct installation of the piston and lubrication guides. Also make sure that the handbrake mechanism is not blocked by the cable. If the problem persists, it is possible that the caliper body is deformed or there are hidden defects inside.
Once the work is done, be sure to drive a few meters in neutral gear to make sure the wheels rotate freely and there is no braking before driving on the road with active traffic.