Written by Sydney Jones, General Service Technician for HomeTowne Auto Repair & Tire
The most crucial safety device in your car is the brakes.
As Newton’s first law of motion tells us, an object in motion will stay in motion until stopped by an external force such as friction. We can’t rely on friction to stop our cars while going 70 miles per hour on the highway, so we have brakes to stop our wheels from turning.
It’s not as simple as “hit the pedal, stop the car,” though. Laws of physics and elements of chemistry come into play, as well.
You hit the brake pedal with your foot, yes. This action then sets off a chain of reactions. When you push down the brake pedal, you tell the master cylinder to apply pressure to the brake fluid running through the brake lines underneath your car.
You have four brake lines, each one going to one of your four wheels. The pressurized brake fluid causes the calipers to press inward on the brake pads, which provide a much greater level of friction than the road and stop your car much faster.
Overtime, the fluid running through your brake lines will get old and obtain air bubbles, and condensated water is created when liquid is on the brake pads. More liquid in the system causes the brake fluid boiling point to decrease whereas it is normally very high to withstand the heat produced from braking.
The lower boiling point will allow for metal pieces to begin to deteriorate. Since the brake lines are made of copper, they leave copper residue in the fluid, resulting in lower braking power and eventually the costly replacement of calipers and brake lines.
To combat this you should have your brake fluid serviced every 30,000 miles. The BG Brake Service is done by taking contaminated fluid out of the master cylinder, pressurizing it, and adding DOT 3 or DOT 4 Ultra Drive Flushing Formula Brake Fluid — depending on the needs of your car — into the master cylinder until only new fluid is coming out of the lines at each wheel.
This removes air and condensated liquid, leaving only your incompressible brake fluid and giving you maximum braking power.
It is important to get this service done every 30,000 miles in order to be covered under the BG Lifetime Protection Plan, which will protect your Master Cylinder, Brake Lines, and Calipers up to $4,000 should they ever fail.
You can have brake service performed at any BG Certified shop, such as Hometowne Auto Repair & Tire.
HomeTowne Auto Repair & Tire is an authorized Michelin and BFGoodrich tire dealer located in Woodbridge, Virginia. Automotive repair services are performed on all makes and models, including oil changes, brakes, alignments, inspections, and computer engine diagnostics.