Isuzu Oasis Brake Hydraulic System Bleed Cost
How Much Does a Brake Hydraulic System Bleed Cost?
Brake Hydraulic System Bleed Service and Cost
Nearly all passenger vehicles use the very reliable hydraulic brake system. At a minimum, the system is composed of a master cylinder, which pumps brake fluid through brake lines, wheel cylinders or brake calipers that actuate the brake pads or shoes, and brake rotors or brake drums that rotate with the wheel until acted upon by the pads or shoes. In order for the brake system to function properly and reliably, the brake fluid must be serviced regularly, including flushing and bleeding the brake fluid to prevent corrosion, air, or water from causing damage in the brake system.
Flushing and bleeding the brakes is performed, most commonly, during a normal brake service, or as part of factory scheduled maintenance. Brake fluid becomes contaminated over time, and will change from a clear, clean fluid, to a dirty, dark fluid. When the brake fluid is dirty, it acts as a corrosive agent to the many rubber components of the brake system. Also, air or water in the brake system may necessitate component replacement. This will also require the brakes are flushed and bled. Many technicians use a vacuum bleeder, a specialty tool designed to suck dirty fluid out of the brake system while new fluid is added to the reservoir. This tool attaches to the bleeder valve of each individual brake caliper or wheel cylinder, and when the valve is turned, suction pulls the fluid from the brake system, preventing air from entering. Once the extracted fluid is completely clean and new, the valve is closed. This is repeated for each wheel.
The most common cause necessitating flushing and bleeding brake fluid is a standard brake service. However, if the fluid is noted to be extremely old, dirty, and hazardous to rubber brake system components, a flush and bleed service should be completed. Also, when there is a brake fluid leak, this service will be completed to remove air from the system. Lastly, if the brake pedal feels too soft or spongy, and the service brakes are not performing to standard, the brake system will be bled and flushed to eliminate air from the system. This will be performed after verification and repair of the source of air.
It is not safe to operate any vehicle with any braking problem. If there is any sign that the brakes are not performing as originally intended, the vehicle should immediately be placed out of service, and repaired. If the brake fluid is being flushed and bled as part of routine maintenance, with no symptoms noticed, the vehicle can safely be driven to a repair shop.
Service of the brake system is part of factory scheduled maintenance, and the schedule is located in the owner’s manual of most vehicles. Most brake services are performed between 40,000 and 60,000 miles, and the brake fluid will be flushed and bled at that time. Notice, failure to adhere to factory schedule maintenance guidelines may result in premature failure of various brake system components.
Brake Hydraulic System Bleed Repair Information
Brake fluid bleeding requires no diagnosis. It is performed at the completion of a repair, as part of a brake system flush, or as a step in testing the brake system if a diagnosis requires.
Many dishonest shops will recommend these services before they are due, when not performing a brake service, and at the expense of the owner. Any time you feel the service is not warranted, ask why it should be performed now and consider contacting one of our certified repair facilities for a second opinion. If you are completely uncertain, you can always ask us for advice here on RepairPal.com.
During a scheduled brake service, the fluid is normally changed and bled. This is because technicians understand the necessity of releasing brake fluid from the brake calipers and wheel cylinders to prevent damage to anti-lock brake components by pushing fluid or debris into the ABS module. When this is done, the fluid may appear clean and clear, but if the factory recommends changing, the best course of action is to follow that guidance.
The braking system can be maintained by a DIYer with a complete knowledge of hydraulically actuated systems. This is important as testing brake operation, and safely servicing braking components rely on this knowledge. If the complete braking system is not understood, damage to the expensive braking components, or injury is likely. Especially when poor braking performance is the symptom, failure to perform this task can lead to a collision. Trusting a professional technician with the replacement of any braking component is normally the best course of action.