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Your Brake caliper repair kit worn out? » Read more about common malfunctions • Repair • Replacement manual
Where is the guide sleeve located?
The guide sleeve is a component that is part of a disc brake. A guide sleeve receives the guide piston, which is screwed onto the brake caliper. It ensures secure lateral support and a smooth sliding of the piston. The brake caliper holds the brake pads. Consequently, an intact and clean guide sleeve is essential for safe operation of a brake.
Guide sleeve defects
The guide sleeve is the weak point in a caliper. Penetrating moisture results in corrosion. Particles of dirt promote abrasion. This can lead to the brake pistons jamming, which would have disastrous consequences. Blocking brakes won't merely reduce the braking action. They also affect the directional stability, which may in particular result in a loss of control over the vehicle during sharp braking maneuvers. This can lead to a roll-over of the vehicle.
In itself, a broken sleeve is not detectable. A jammed caliper, however, can be determined by the squeaking or a strong heat generation at the wheel. If one front wheel is much hotter than the other after use of a vehicle, it can be assumed that a brake piston is jammed.
The cause of a defective guide sleeve is always a damaged seal. The seal serves to keep the lubricant within the piston guide and protect from dirt particles. The seal is composed of rubber and can become brittle and cracked as a result of aging or foreign particles. The seal is located in close proximity to the brake line, where it is exposed to strong temperature changes, moisture and abrasive particles. Thus, a seal can be expected to wear sooner or later on every vehicle.
Repairing a guide sleeve
A guide sleeve set is included with any brake caliper repair kit. The guide sleeve set can also be purchased separately. However, when overhauling the brake caliper, we recommend always overhauling the entire unit.
However, there can be use cases in which a guide sleeve set suffices for a repair. For example, if a new guide sleeve was damaged while overhauling a caliper.
You can find a wide range of low-cost guide sets in our shops. When assembling the guide sleeve, please ensure the correct seat of the seals. Proper lubrication is also essential to ensure the longevity of the guide sleeve. Only use the permitted lubricants for this purpose! Unsuitable lubricants may attack the rubber seals and dissolve from the inside out!
If you are working on a used car, which you are planning to subsequently sell, painting the brake calipers is a clever way of increasing the car's value. For one, a brightly painted brake caliper looks very stylish. Furthermore, a freshly painted brake caliper is evidence of the fact that work was recently performed on it. It creates a trustworthy impression. Brake caliper repair kit The generally massive design of brake calipers makes repairs relatively easy. Repair kits can be purchased from the online shop with prices starting at 20 euro. The entire unit can be disassembled in a few simple steps and restored to a proper condition with the help of a repair kit. Diligence and cleanliness are essential here. Nothing will destroy a piston quicker than penetration by dirt or moisture! In addition to numerous step-by-step manuals readily available online, it is crucial to closely follow the manufacturer's instructions. The piston must be tightened with a particular vendor-specific torque and secured with the prescribed adhesive (usually, but not always, "Loctite Blue"). If the caliper is already laying on the workbench in its disassembled state, a paint job would be an easy way to visually enhance the vehicle following a thorough cleaning.