Let's talk about something critical for all San Diego drivers: your brakes. Your vehicle is heavy, and it takes a lot of muscle to bring it and your passengers to a safe stop – so everything needs to be in good working order.

Here's an explanation on how your disc brakes work:

The wheel hub keeps your wheel attached to your vehicle. The brake disc – or rotor – is attached to the hub and rotates with the wheel as you drive around San Diego. Your brake pads clamp onto the rotor to slow the wheel.

The brake caliper straddles the rotor and squeezes the rotor to slow it down. The calipers contain brake pads which press on the rotor when you put your foot on the brake. The brake piston causes the calipers to squeeze and release as you use your vehicle brakes.

Your brake pads start to wear the first time you step on the brakes. Eventually the pads wear out and need to be replaced. If you don't replace the pads when they're worn out, the metal parts of the brake will grind against the rotor and carve grooves into the surface. We've all heard grinding brakes and it's not a pretty sound.

If a rotor isn't scored significantly, your friendly and knowledgeable John's Automotive Care technician can put it on a lathe and smooth it out. If the grooves are too deep or if the rotor is warped or cracked, you need to replace it.

Sometimes brake pistons can stick and must be replaced. Typically it's cheaper to replace the entire caliper at John's Automotive Care in San Diego than to rebuild the piston.

So there you have it – an important lesson on how your disc brakes work. If you replace brake pads on time, it will not only keep your vehicle stopping safely but could save you cash on unnecessary repairs down the road.

John's Automotive Care
6267 Riverdale St
San Diego, CA 92120
619-280-9315
http://www.johnsautomotivecare.com